Hypothesis: My hypothesis is that the cold water will freeze faster than the hot water. The reason that I believe the cold water will freeze faster is because the temperature of the cold water will be much closer to freezing temperature.
Data from the experiment
½ cup hot water @ 118 F
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½ cup cold Water @ 58 F
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Freeze time
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Freeze time
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First Time
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46 minutes 33 seconds
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26 minutes 13 seconds
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Second Time
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44 minutes 54 seconds
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25 minutes 21 seconds
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Third Time
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43 minutes 9 seconds
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25 minutes 39 seconds
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Controlled Variables
Glasses
1/2 Cup Water
Water temperature
My theory is that cold water does indeed freeze faster than hot water. The data clearly indicates that the water at the colder temperature freezes much faster than the water at the hotter temperature. The reason for this is because the cold water is already much closer to the freezing point than the hot water is and therefore takes less energy to freeze.
2. Does hot or cold water boil faster?
Hypothesis:
Hot water is going to boil faster because it is much closer to the actual temperature that water boils at than the cold water is.
Data from the experiment
½ cup water @ 118 F
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½ cup water @ 58 F
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First time
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1 minute 45 seconds
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2 minutes 38 seconds
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Second Time
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1 minute 22 seconds
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2 minutes 46 seconds
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Third Time
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1 minute 50 seconds
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2 minutes 20 seconds
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Controlled Variables
Pan the water was boiled in was the same
Setting on the stove was the same
Amount of water used was the same
My theory is that the hot water clearly boils faster than the cold water. Based on the results from the experiments the hot water reached the boiling point at a faster rate than the cold water. This is most likely do to the fact that the hot water temperature was already much closer to the boiling point than the cold water.
3. Does salt water freeze faster than regular water?
Hypothesis
The salt water will freeze slower than the regular water because the salt will react with the water and its reaction will slow down the freezing process.
Data from the experiment
½ cup water with ½ tbsp of salt added
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½ cup water with no salt
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First time
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58 minutes 36 seconds
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27 minutes 14 seconds
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Second time
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57 minutes 44 seconds
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26 minutes 46 seconds
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Third time
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59 minutes 12 seconds
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26 minutes 32 seconds
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Controlled Variables
Amount of water
Amount of salt
Temperature of water
Glasses water was froze in
The theory for this experiment is that the salt water slows down the freezing process of water. The data from the three experiments clearly shows that with the salt water added the water froze at a much slower rate than it did without the salt water.
Step 1 Ask a question- for all of these experiments questions were asked and the goal was to find the answer to these questions.
Step 2 Do background research- I looked around online and researched what the outcomes of the tests might be.
Step 3 Construct a hypothesis- I constructed a hypothesis for each of the experiments and listed them above
Step 4 Test hypothesis with an experiment- Test were done and experiments were ran for each of the hypothesis above
Step 5 Analyze your data and draw a conclusion- All of the data was analyzed and graphed out to show what I has found. My conclusion was then listed after each experiment.
Step 6 My results were communicated with my professor as well as the entire class by posting them on this blog.
I think this experiment is an easily repeatable experiment and I think the results should come out pretty similar each time. I definitely think this is an experiment that anyone could easily repeat.
Average values for the results were as follows:
Hot water freeze average was 44 minutes 52 seconds
Cold water freeze average was 25 minutes 44 seconds
Hot water boil was 1 minute 39 seconds
Cold water boil was 2 minutes 35 seconds
Regular water freezing was 26 minutes 30 seconds
Salt water freezing was 58 minutes 31 seconds
There were many different science concepts that were addressed during the experiments that were done. First of all I looked at how to form a hypothesis when a question is asked and then I learned about how to set up an experiment when I do have a hypothesis so I can either prove or disprove that hypothesis. For this experiment we also learned about the three states of matter and why and how the move through these states.
The experiment were done to show how water reacts to different temperatures when you are freezing it and when you are boiling it. The experiment also showed what happens to water when you are trying to freeze it. The water experiments showed that if you set up the experiment well you can get consistent results that will lead you to be able to form a theory that is easily provable.
The knowledge that was gained during these experiments can have many different real world applications. Just knowing how to formulate and set up and experiment is a skill that will benefit someone in the future when they are trying to figure things out in the future. Also the knowledge that was gained about water was also very beneficial. When I am boiling water I know that i should start with hot water and if I want ice cubes I know I should start with cold water. I also now know that if there is a some water that I would prefer to freeze quite a bit slower I can just add some salt to it.
Three States of matter for water
Atoms that make up water molecules
