Choose one activity from this year and identify the steps of the scientific method that were included in the activity. Be sure to include an activity that involved all of the steps.
I'm also including a form for you to fill out if you have the time.
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Tuesday, May 18, 2010
End-of-the-Year Essay
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1. Define the problem: Will a water balloon pop when exposed to fire?
2. Research: A balloon that isn't filled with water will pop.
3. Hypothesis: I think the balloon will pop.
4. Set up experiment: Mr. Hoegh filled a balloon with water and put it over a candle with a flame.
5. Analyze data: The balloon did not pop.
6. Conclusion: The balloon did not pop because the water doesn't heat up fast. Compared to a balloon not filled with water, the water absorbed the heat. Molecules did not have to find a low pressure area (outside the balloon). My hypothesis was wrong.
When we did the GPS activity and tried to find the film canisters that were hidden.
Problem: Use the GPS to find the canisters
Research: Know how to use the GPS.
Hypothesis: I believed that the smartest strategy was to try to get the ones farthest away, and get more points.
Expirement: We used the GPS and went and found as many film cannisters as we could.
Results/Analyse: We did find a lot of canisters, but we didnt recieve a lot of points because we wasted time going to the far ones.
Conclusion: My hypothesis was wrong. We should have picked canisters closer to our location instead of farther away.
Burning a Ballon!
Problem: How do you burn the outside of a balloon without it poping?
Research(and hypothesis): Water puts out a fire, so maybe water inside of the balloon will keep it from poping.
Hypothesis: Water will keep the balloon from poping in the heat of the fire
Experiment: Put water into the balloon and hold over fire to see if it pops. Add more and more water
Analyze/Conclusion: The water slowed the poping process, but still popped in the end. Adding more water, made it harder for the fire to pop the balloon, but ended up burning the outside of the balloon.
Results (hypothesis correct?):
Yes; with enough water, the balloon will not pop.
Essay Question:
The one activity that showed all of the steps for the scientific method was the GPS contest. Our purpose was to use the GPS and find all of the waypoints hidden around the school. The hypothosis was "we can find ALL of the waypoints," which was one many of us formed. The experiment proved that our hypothosis was incorrect, because not all of us found the waypoints. These were our results that we had to analyze. The conclusion to this activity was that the Fighting Squirrels won the contest in our class period
ok one of the things i did this year using the scientific method was finding out if water killed wasps. and my theory is that if you spray them with water it will not kill them it will just make them mad and they will try and sting you. so for my experiment i found the wasps nest under my deck and sprayed them with water. two days later i went back and found out that it didnt kill them. so my conclusion is that if you spray them with water it wont kill them it will just make them really mad. and they will try and sting you!!!!!! so watch out
Problem- Mr. Hoegh was pondering if A balloon filled with water put over a fire would pop.
Hypothosis-i personally believed, The water in the balloon would absorb the heat, so the balloon didn't have to do so.
Research-we had a little common knowledge, and knew that a balloon would pop if you put it over a fire.
Experiment-We experimented with an amazing balloon that had just air in it, and it popped, then we put a little water in a different balloon, of course, and it did not pop!
Analyze-The balloon did not pop with a little water inside of it.
Conclusion- If you don't want balloons to pop from heat, just put a little water in it!
Steps of the scientific Method:
1)Ask a question
2)Research
3)Form a Hypothesis
4)Expirement
5)Analyze Results
6)Draw a conclusion
Example:
1)Is it possible for a balloon not to pop over a candle?
2)Contains oxegen
3)If we add water, the balloon will not pop
4)Put water-filled balloon over candle. Did not pop
5)Balloon did not pop, but had a dark spot on the bottom.
6)The balloon did not pop because the water absorbed most of the heat so the balloon didn't have to.
WIll The Baloon Pop!!!
We wanted to know if a baloon would pop if it had water in it and we put over a candle. We knew that a regular baloon would. I hypothesised that it would pop anyways. We did the expirement and the baloon didn't pop! So, we conclude that a baloon would not pop if it has water in it. And it turns out that my prediction was wrong.
the activity I chose is the crushing can one.
purpose-to test the pressure around the can when warm air was in the can and cold was around it.
research-to see how heating the can will effect it when we put it in cold water.
hypothysis- i thought that the can wasn't going to do anything
analysis-I observed that the when you heat the can and put it in colder water the can does, in fact, crush.
conclusion- the can was crushed!!!!!!!! ahhhhh how cool was that.... see the video i recorded for extra details:)
My favorite activity from this year would be when we did the gps hunt though our gps didnt work very well.Since we could not really find the pieces of paper we had to find it our selves. though we did research by seeing where some people went and followed though we did find a few. We formed a though or inference about the general area of some canisters from people we then experimented by looking in the area people had visted or looked at. we then found the some people werent right about there they were though we did find 3 canisters out of the 15. In the end followng and looking or searching around a cetain area didnt work out very well at all. The gps did start working in the end though and we did find 3 more but unfortenently they didnt have a pencil to right on the slips of paper.
The pencil bag demo
1. the purpose was to see what would happen if you put a pencil through a plastic bag filled with water
2.research: we knew the pencil would clog the hole
hypothesis: the bag wouldn't leak
experiment: Put a pencil through a bag filled with water
analyze: no water came out of the bag
conclusion: the bag doesn't leak when you stick a pencil through it.
Lab: can you pop a balloon with water in it using fire?
Purpose: see "Lab"
Research: we talked about it a little bit in class based on what we already knew.
Hypothesis: i thought it would pop
Experiment: it didn't pop until Mr. Hoegh put a part that didn't have water next to it by the fire
Analize: the balloon didn't pop when there was water on the other side of the plastic
Conclusion: if there is water in a balloon, it will not pop because of fire where the water touches the balloon.
Purpose: Does SPF 30 sunscreen block twice as many UV rays than SPF 15?
Research: SPF 30 supposedly blocks twice as many UV rays as SPF 15
Hypothesis: SPF 30 sunscreen will block twice as many UV rays as SPF 15
Experiment:
1. Set up calculator
2. Put SPF 30 and SPF 15 sunscreen on ceram wrap to cover up circles on a piece of paper.
3. Raise the paper towards the direction of the sun and use the calclators to measure the UV ray intensity
Analysis:
SPF 15 blocked 7,490 UV rays
SPF 30 blocked 8,650 UV rays
Conclusion:
SPF 30 sunscreen does NOT block twice as many UV rays as SPF 15 sunscreen
GPS day..
1) we stated the problem, we had to locate the canisters.
2)research what we were doing, figured out our strategies and which way would work the most effiecently for getting the most points.
3) our hypothesis was that we would win
4) testing our hypothesis, we searched for the canisters
5) analazed the data, so we counted up everyones points, to see who wins.
6) the conclusion was that we lost.
so, i think i can just put my essay on here, right??? well, here goes...
1) we had a problem. we wanted to know how to smash a can.
2)we did some research, and found out that one way to smash the can was to put it over heat, then put a seal on the lid.
3) we hypothesized that this would smash the can
4) we tried the experiment.
5) we recorded our results, and analyzed the data.
6)we drew conclusions. yes, the can did smash.
=D
The problem:
There were film canisters we had to find with a GPS
Research:
Figuring out the GPS and knowing what latitude and longitude are
Hypothesis:
I think we will do very well
Test:
We found like 7-9 I can't remember
Analyze:
We worked well as a team and met expectations
Conclude:
I think we did pretty well and even though we didn't come out on top I think it was a moral victory for us. I learned how to use a GPS which will probably come in handy when I go hiking this summer
This year we did a lab involving warm and cold water. Our PURPOSE was to see what would happen when you combined the same amount of warm water with cold water, and relate this to ocean currents and density. To REASEARCH this, we had spent days before looking in our textbook in the sections about ocean currents and density as well as completing flashcards, and taking notes in our science logs. Then we got into groups and formed a HYPOTHESIS about what would happen when the water combined. I think we said the warm water would rise because it was less dense. Then we put a divider in a dish of water and filled one side with cold water and one side with hot water. Our EXPERIMENT was to take out the divider and watch how the hot water (colored red) and the cold water (colored blue) reacted with each other. Next, we ANALYZED the data by recording what happened on a worksheet and we discovered that our hypothesis was correct. Out CONCLUSION was: after the divider is pulled, the warm and cold water will circle the container for a while and eventually the warm water will rise above the cold water.
Our hydrogen lab
Purpose- Use hydrogen to make fire enlarge
Research- Learning how and why hydrogen reacts to fire oddly.
Hypothesis- Thinking that the fire will burst for a moment
Experiment- Putting as much hydrogen into a vial and putting it next to a match
Analyze- The fire burst for a second and the all the hydrogen got out of the vial
Conclusion- Hydrogen reacts with fire violently.
Sorry Mr. Hoegh for breaking your glass beaker we wont do that again. I'm Sorry.
For the essay i chose the GPS contest. The problem was that we needed to find 15 and we had 30 minutes. My research was looking at the map and choosing a route to go to find all of them. My hypothesis was that we should run the whole time and work well as a team by splitting up when we got within 5-10 feet. When we did go out and try to find all of them not everyone ran so that slowed us down and not everyone put the effort in looking hard for the canisters but we did find many canisters. Our analysis was that we found 10 out of 15 and had a 1 minute late penalty which made us lose a point overall we either had 26 or 27 points i think. My conclusion is that we worked well overall and found 2/3 of the canisters but we couldve hustled and tried harder.
The land V.S. Water experiment when we had to find out which one got hotter faster and which one kept the heat on the longest.
The problem was finding out which one got hotter fasters and which one got colder faster
The rescearch is when we went on to a gizmo and saw how they cool down faster and how they warmed up faster.
The hypothsisies is that I said the land warms up faster but the land also cools down faster.
The experiment is that we took a heat lamp and put it over a tin dish with one with water in it and one with sand in it and then we put themometers in each and recorded the temp. every min.
The analizing is that we recored the Temp. every min. with the lamp on and then again with the lamp off.
The conclusion is that land warms up faster but water keeps in all the heat for a longer time.
in the gps activity, the problem was that we didnt know where the things are located. then we had to reaserch where the things were. once we got to about where it was we had to hypothisize where it is where it was. the experment was finding where it was. to anlyze was to see who had the most points. and to conclude was to find out it was hard to find them.
Problem/Purpose: Does Diet Coke float? And Coke Sink.
Research: We looked at the contents of each pop can.
Hypothesis: Yes, the Diet coke will float
Experiment: We put a Diet coke and a regular coke in a fish tank to see if either one of them would float.
Analyze: The diet coke floated while the regular coke sank to the bottom of the tank
Conclusion:The diet coke sunk because it's contents were less dense than the water in the tank was.
At the beginning of the school year we learned the scientific method. During the school year we have done many things using the scientific method. Like yesturday for example, we had yeast and hydroproixide. We wondered what would happen if we combined them (determine the problem). Then we looked at what we already knew (research). Then we predicted what we thought was going to happen. I predicted the two were going to cause bubbles. Then we set up the experiment and test it. We record of the data during the experiement then afterwards, u and other people sit down, look at the result, and see if thats what u expected (analyze). Then after you analyze your data you conclude and decide if you hypothisis was correct or incorrect. If incorrect how might you make you hypothisis correct.
problem
research
hypothisis
experiment
analyze
conclude
The activity that I chose this year was one of he recent ones that we just did...the filled up water pouch and sticking pencils in it! The PROBLEM or QUESTION is will the bag leak when you stick a pencil all the way through it without taking it back out? The next thing to do is RESEARCH, my research was past knowledge. Like one time I saw a magic show and the guy stuck a pin through a balloon without popping it. So I figured that it probably won't pop even with water in it. Next is HYOTHESIS, my hypothesis was that he bag will not leak even with a pencil sticking through it. Next is EXPERIMENT, you actually did the experiment but I watched, so it counts. So you slowly stuck some pencils through the bag. Next is ANALYZE, we got five pencils in the bag before it started dripping. Lastly is CONCLUSION, my conclusion is that we were able to put five pencils before it started leaking, so my hypothesis was correct.
This year was the best year for science! I learned all kinds of information and did some really cool experiments. But one of the things that I am going to have to remember is the Scentific Method. For an example of the Scientific Method im going to use when we mixed yeast and hyrdrogen peoxide. First we had the question as to what will happen when the hydrogen proxide gets mixed with the yeast? Then we researched the compontents of the HP (hydrogen proxide) and make a hypothesis that it will fizz or it will turn into water cancelling out some elements. Then we performed the experiment pouring HP into some yeast and it fizzed..but not only that but when Mr. Hoegh put a match in it it flamed up and poped. So the information we got out was that the gas was flammable and fizzed. Our conclusion was part of our hypothsesis was correct, and part was incorrect.
In the pencil through the water sack lab we had to ask the question if we think the water will come out when you poke the pencil through the sack. We didnt do much backround reserch, but i made a hypothosis that the water would come out. We tested it by poking the pencil in and we analyzed that the water didnt come out so i reported the result that my hypothesis was wrong.
when we did the dencity lab with the warm red water and the cool blue water, the problem or process was will the red water go over the blue water, we resureched that warmer air is less dence then cool air and will rise over cool air, so my hypothosis was that the red would go over the blue, we then experemented with having cool blue water on one side of a container and warm red on the other with a divider in the middle. we then took out the divider and the red warm water went over the cool blue water. so we analized the resalts showing that the red warm water did rise over the cool blue water. so we then concluded that our hypothosis was right.
Yesturday we found out if Hydrogen Peroxide and Yeast mixed would make a gas.
P- Do you get a gas when you mix Hydrogen Peroxide and yeast?
R- There wasn't much done here but we found the properties of the Hydrogen
H- We each made a hypothesis stating whether or not we thought they'd make a gas
E- We did it! It got all bubbly and foamy when we added the Hydrogen peroxide to the yeast (in a beaker of course) And then we took a stick and make it smoulder over a candle flame then put it over the beacker and watched the flame start up again, thanks to the pure oxygen element that was created.
A- We found that the oxygen element was created and documented our results.
C- When you mix Hydrogen Peroxide and yeast it DOES make a gas. That is our conclusion we drew after performing this expirment.
From Des & Jenny ,
Identify the problem- I (Jenny) can't blow a bubble with gum
Research- we go onto the internet and search, how to blow a bubble out of gum, and what gum blows the best bubble.
Hypothesis- If i chew hubba bubba bubble gum, and do as this websight says ; http://www.wikihow.com/Blow-a-Bubble-with-Bubblegum i should be able to blow a bubble gum.
Expiriment- we tried blowing a bubble,,,, AND IT WORKED.
Analyze- our hypothesis worked!
Conclusions- OUR HYPOTHESIS WORKED!
Hello Mr. Hoegh,
I enjoyed the crushing cans experiment the most and i choose that to discribe the 6 steps. The first step is to identify the problem which is, would the heated can crush if placed in water. Then you gave us some back round information on what happens air leaves containers. Next you gave us some time to make a hypothesis and to explain why we thought that would happen. Next you performed the experiment and then after that you gave us time to analyze what we saw. Finally we compared our conclusions and then shared them as a class.
Thanks for being my Science teacher and it was a very exciting.
in the GPS experiment our group had to identify the problem by hearing that you put those can things and spread them out around the school grounds.... then the research was learning how to use the GPS and getting a map of where the areas are.... we hypothesized where possible cans may be.... and then the actual experiment was when we actually found the cans.... and then we analyzed who found the most cans..... and then we concluded the activity by seeing who won and seeing where all the cans were placed....
1. Identify the PROBLEM/Why did the Hindinburg burst into flames
2. REASHEARCH the problem/We looked at the engine and the gases used to inflate the Hindinburg
3. Make a HYPOTHOSIS/We thought that it was the flamable gas hydrogen
4. EXPIREMENT the hypothosis/We turned a ballon filled with said gas into a BALL OF FIRE
5. ANALYZE the data/We found that the Hypothisis and the data matched
6. Draw a CONCLUSION/The Hindinburg was burnt because of the inflating gas, hydrogen!!!
The ballon one from yesterday
1st step ask the qusetion/state the question which was will the ballon pop if it has 60mls of water in it
2 do the research, i know that the air in the ballon will exspand but in also now that water does not exspand
3 make a hypothis which is a scientific question such as will the ballon pop with water in it with a candel burning it.
4th step is doing a test or experiment on your hypothis and seeing if it all works out
5th step is analyize the data see if your gues was right
6th step is to see your results and if your guest was right your hyptheses was right which means your method was right
GPS Contest
I thought the gps contest was probably the most fun day of the year. We used the scientific method without even realizing it. I am going to explain how we used it.
1. The first thing we did was found our problem. Our problem was that we didn’t know where the little canisters were. We needed to find them using our gps. We also needed to try to get there first.
2. Next, we had to do a little research. Mr. Hoegh showed us a map that had the 3 different zones that gave us different points. We used this to do the next step.
3. The next step was to form a hypothesis. Our hypothesis was to go to the ones furthest away first so we could get the most points.
4. Our next step was the actual experiment. We tested our hypothesis. We went to the farthest canisters first and tried to get there first.
5. After the experiment we had to analyze our results. We got 2nd place in our class (I think).
6. Conclusion: Our hypothesis was pretty good. I think we could have tried this experiment again and tried a new hypothesis to see which one worked better. I also think this experiment depended on our physical ability. We could have run a little faster and maybe made it to more.
End-of-the-Year Essay
1. idenifify the problem
we are going to see if a ballon will still pop with water in it over a candle
2. research what you already Know
we know the ballon will pop with out water in it over a candle
3. make your hypothesis with materials ane the proceeders of how you are going to do this
the materials would be a couple of ballons,candles, and matches
4. preform your hypothesis by putting a little bit if water in the ballon and tie it and hold it over the candle flame, and wait and see waht happens.(expierments might not be the same)
5.Record your data of what happened
in this case the ballon did pop when we put it with the tied end down
6. Conclusion what happened and was your hypothesis correct.
yes my hypothesis was correct becasue the ballon still poped when it had water in it
Problem:Is hydrogen peroxide & yeast flammable when mixed together?
Research:
Hypothesis:Didn't think it would start on fire.
Experiment: took the splint that was blown out and placed it into the mixture.
Results: It started on fire.
Conclusion: Hydrogen peroxide & yeast together makes oxygen and stared it back on fire.
Emo mr. hoegh,
I am gonna demonstrate the scientific method by talking about the crshed cans.
well u state the problem and that is that the cans will be crushed or not crushed. Then u research and find some answers and that is wether the can will be crushed or not. Then u form a hypothesis and that is that the can will be crushed when u flip it over quickly. Then u esperiment the hypothesis and it does crush when u do flip it over quickly. Then u anylize your data. Then u conclude your crushing of the cans.
Thank u for allowing us to do this amazing experiment mr hoegh
I liked the balloon lab we did yesterday
first we asked the class what they thought would happen. next we talked about the stuff we already knew or what happened in other classes. We came up with a hypothesis on what would happen if it would pop or not the did the expirement. The baloon didnt pop. We analyzed the data on why it didnt pop and stuff then saw if our hypothesis's were correct.
When we did the GPS activity we had to analyze the problem or where we need to go to find the marker, research GPS (even though we didn't). Form a hypotheses of where to go for the GPS, test your hypothesis of where to go, analyze your results of of where to go, and then communicate on how you got there and start over.
End of the year essay:
I liked the expiriment we did yesterday with the pencils through the bag. First we asked the question: will the water leak through the bag or not? And we could have done research but in this case we did not. Next we all made a hypothesis on what would happen when we poked a pencil through the bag of water. (i guessed that it would leak)
After these syeps completed we tested out the expitiment by sticking the pencil through the bag. we analysed the bag and saw that no water leaked. so we came to the conclusion that the pencil seeled the hole and no water could come out. It was legit.
i am doing my essay on the sunscreen lab we did yesterday. the first thing we did was found the purpous, which was to see ho much sunscreen helped. next we resurched the things and found that spf 30 protects more than 15. then we formed our own hypothisis that the 30 would protect twice as well as the 15. then we did the experiment wich was the wands conected to the calculators. next we analized the results by looking at the numbers we recorded. finaly we made a conclusion that 15 protects almost as good as well as 30
Identify the problem: Will warm water or cold water rise or affect each other?
Research: Mr. Hoegh explains to us about warm air rising and cool air sinking
Hypothesis: That the warm red water will rise above the blue cold water
Experiment: Put the water in the same container
Analyze the Results: The red warm water rises
Conclusion: Warm water/air rises and cold air/water sinks
Identify the problem: is warm water denser than cold water?
Research: warm air is not denser than cold air.
Hypothesis: I think that warm water is not denser than cold water.
Experiment: Cold water is dyed blue. Warm water is dyed red. Cold water is put on one side of a container and warm on the other separated by a plastic barrier. Lift the barrier out of the container and let the water move into eachother.
Analyze the data: Warm water rose to the top while cold water sunk to the bottom.
Conclusion: Warm water isn't denser than cold water.
Yesterday, we went outside to decide whether or not 30 SPF sunscreen had twice the protection of 15 SPF sunscreen. This was our Purpose, or our reason for going outside. When we looked at past classes results, we were doing Research, or studying our problem. The information from those other classes helped us form a Hypothesis, or an educated guess, about what would happen. When we went outside to test our hypothesis, we were doing an Expirament. After we had collected all of our data, we were able to analyze our Results. From this, we could draw a Conclusion, or our final result. Our conclusion was that 30 SPF sunscreen doesn't protect twice as much as 15 SPF sunscreen does.
The purpose of trying to pop the balloon over the flame was to see if the flame would pop the balloon with or without water. Research included knowing that the flame would pop the balloon without water, and that the balloon would get to hot to stay blown up. In the experiment, we blew up two balloons. We had a burning flame on a candle to pop the balloon. We set the balloon without the water over the flame and waited tell it popped. Then, we set the balloon with the water over the flame, and it took much longer to pop. The result was, that the "only air" balloon popped faster, and the balloon with the water took more time. We came to the conclusion that because the water has to heat up before the air in the balloon will heat up, so it will take longer to pop. Plus, the heat in the water has to transfer to the air in the balloon which takes longer.
Balloon/Water Lab.
-Purpose:To find out if a balloon with 60mL of water in it will pop once coming into contact with an open flame from a candle.
-Research:Other people's guesses, what happened in other classes as a result of the experiment.
-Hypothesis:A balloon with 60mL of water in it will not pop.
-Experiment:The balloon didn't pop until we lit the bottom part of it on fire, causing the balloon to pop, even with the water on the inside of it.
-Analyze:The balloon with water in it took much longer to pop than the one without water in it, and only popped when we lit the bottom part of it on fire. :) haha
-Conclusion:My hypothesis was incorrect,a balloon with 60mL of water in it will pop once coming in contact with an open flame from a candle.
Balloon and water lab,
-The didnt pop when it had 60mL of water in it plus air. It only blew up when Mr. Hoegh lit up the tail of the balloon.
-Purpose: Balloon with no water then a balloon with 60mL of water.
-Research: To think if the balloon will pop with 60mL of water in it.
-Hypothesis: make a prediction on the clickers to see if the balloon will or wont pop.
-Experiment: Put the balloon with 60mL of water in it over a cadle that is lit.
-Analyze: What happened to the balloon and if it popped or didnt pop. The balloon only popped when Mr. Hoegh lit the tail of the balloon.
-Conclusion the balloon only blew up when the tail of the balloon was lit on fire.
Im am going to talk about the class lab we had when we put the hot water in the pop can then flipped it upside down in the cold water. Our problem was trying to crush a pop can in a cool and interesting way. We really didnt research it, but with our prior knowledge we knew that the cold air outside of the can would have to somehow get into the can where the warm water is, but the water would stop it. Our hypotheses was that the pop can would basically get crushed. We experimented with it two ways: putting the can upside down in the water, and putting a stopper on top of the can so no air could get out. We put 10 mL of boiled water in both cans. Our analysis was that the can was crushed in both experiments so we concluded that putting hot water in a can and not letting any air get out or in, would crush it.
Balloon and Balloon with water expirament:
1.Purpose-to find out if the balloon with 60mL of water would pop when put over a lit candle.
2.Research-Other people guessed on what they thought would happen.
3.Hypothosis-I think the balloon with water won't pop at all, but the one without water will.
4.Expirament-We lit a match and set a candle on fire. Then, we blew a balloon up, and then set the balloon over fire. It popped. Then we blew another one up and added 60mL. of water to it, and no matter what we did the balloon wouldn't pop.
5.Analize-The balloon didn't pop when there was water in it, but when there wasn't water in it, it did pop.
6.Conclusion-My hypothosis was correct because I said the balloon wouldn't pop when there was water in it. It didn't! I also said that the balloon would pop without water.
The Water Density Lab
In the water density lab, our purpose was to figure out whether warm or cold water is more dense. For the research I knew that warm water had less molecules that were further apart and moved faster. Cold water had more molecules that were closer together and moved slower. My hypothesis was that the cold water was more dense, so it would sink to the bottom. Our next step was to experiment. The warm water had orange food coloring in it and the cold had blue food coloring. We put a divider in a tank and put the warm water on one side and the cold water on the other side. Then we took the divider out. The results were that the warm water rose to the top and the cold water sunk to the bottom. I concluded that my hypothesis was correct and that cold water is more dense than warm water.
Crushing the pop cans.
PROBLEM: Find a way to crush cans.
RESEARCH: ?
HYPOTHESIS: The heated can will crush when it comes in contact with the cold water.
EXPERIMENT: 10 mL of water in a clinder. we heated up an empty pop can then put it upside down on the water so the top was completely sealed.
ANALYZE: The can got crushed and
the water spilled.
CONCLUSION: The can did crush all three times.
Balloon Popping.
1, Find the Problem: To see whether or not the balloon will pop with water inside of it.
2, Research: Water doesnt always get beat by heat.
3, Hypothesis: The balloon will pop within a time period.
4, Experiment: Put water in the balloon and put the balloon at at tilt over a candel.
5, Analyze and draw a Conclusion: We put the balloon to its side, and the heat just rose all around the side and water didn't get affected. We switched it to all sides, until finally the part of the balloon that dangles down set on fire.
6, Results: The balloon popped after the part of the balloon that hangs down set on fire.
We used the scientific method when we completed the UV Ray lab.
1.Problem: We wanted to find out if spf 30 sunscreen really blocked out twice as many UVA and UVB rays as spf 15.
2.Reaserch: We looked at some of the results that other classes had gotten earlier in the day.
3.Hypothesis: You asked us if we thought that the 30 spf would be twice as effective. I did not think that it would.
4.Experiment: We went outside and using the UVA/UVB detectors, we measured the light that passed through plastic with no sunscreen, with spf 15, and spf 30. We had two people doing this.
5.Analyz: We found that the spf 30 did NOT block out twice as many rays as 15 spf. Sometimes, it blocked out even less rays than the spf 15.
6.Conclude: My hypothesis was correct. The spf 30 did not block out twice as many rays. We concluded that there could have been some human eror in this experiment. The spf 15 sunscreen may have been thicker than the spf 30. Also, the spf 30 was a spray, which may have caused it to not block out as many rays.
CHRISTA GRIGGS!:
Baloon popping lab.5/18/10.
Scientific method:
-Find problem:The problem was seeing if the baloons going to pop in the fire with water on the inside.
-Research: it had popped in the fire before water was in the baloon
-Hypothisis: My hypothisis was it was going to pop because it still had oxygen in the baloon.
-Exeriment: blew up a baloon and added a litte water. tied and put it over the fire on a candle to see if it was going to pop.
Next 2 Are Grouped together.
-Analyze: >>>
-Results: what happen is that the baloon did not pop. we tried to move the water and make it pop. and it still didnt. so we started the twisty thing on fire and it finally popped.
-Conclusion:my hypothesis was wrong. it did not pop. i thought it would. it only popped because we started the baloon on fire. so no it did not pop my hypothesis was wrong because the baloon didnt pop because the water inside the baloon absorbed all the heat.
Balloon popping
Purpose- The purpose was to find out if the balloon would pop if there was a little water in it and it was put over a flame.
Research- I already knew that the balloon popped without water when it was put over a flame.
Hypothesis- My hypothesis was that the balloon would not pop with water in it when it was put over a flame. I predicted that it would not pop because if it had there would be water everywhere.
Experiment- Mr. Hoegh put 60 mL of water into the balloon and then blew the rest of it up. He put the balloon over the flame of a candle. Mr. Hoegh sloshed the water around after we saw that it wasn't popping.
Analysis- We found out that the balloon did not pop when placed over the fire and we saw that it just turned black around the area that was placed in the fire. It popped, however, when Mr. Hoegh put the part of the ballon that was tied into the fire. It popped because it started on fire.
Conclusion- We concluded that the balloon would not pop with water in it. It doesn't pop because it takes water longer to heat up and so it was absorbing the heat.
The Scientific Method-P.R.H.E.A.C.
Problem, Research, Hypothesis, Experiment, Analyze, Conclusion
The scientific method of the UV Rays Lab was first identify the PROBLEM that we didn't know whether or not a sunscreen with double the SPF would block double the sun rays. To find this out we RESEARCHED the problem of whether or not the sunscreen with 30 SPF would block more than the sunscreen with 15 SPF. Next our class formed a HYPOTHESESIS of what the outcome would be. After we formed our hypothesis', we went outside to test the EXPERIMENT. To setup this experiment, we placed the sunscreen on saran wrap and held it up to the sun to test the experiment. After we ANALYZED the data, and compared the answers. The CONCLUSION turned out to be that the SPF 30 sunscreen doesn't blosck twice as much of the UV Rays.
Purpose- Does 30 spf suncreen protect twice as much as 15 spf sunscreen?
Research- We looked at the notes that were made by previous classes and thought about the possible differnces between spray on sunscreen and lotion sunscreen.
Hypothesis- We predicted that spf 30 does not protect aganist UV rays twice as much as spf 15.
Experiment- We went ouitside and recored the amount of UV rays by useing the calculator extensions that measure the amount of UV rays, we measued the amount of UV rays with no sunscreen, the amount of UV rays with spf 15 (lotion)sunscreen, and the amount of UV rays with spf 30 (spray on)sunscreen.
Analyze- We discovered that there was actually more UV rays with the spf 30 suncreen then there was with the spf 15 sunscreen.
Conclusion- We concluded that in this case the spf 30 sunscreen did not protect twice as much as the spf 15 sunscreen, however the difference between the spray on sunscreen and lotion sunscreen could have affected the results
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