Problem 1: Does hot water or cold water freeze first?
Hypothesis: I predict in this experiment i will find that cold water will freeze faster than hot water because the temperature of the cold water is closer to waters freezing point than the hot water.
Materials:
1. Freezer
2. 1 Cup Measuring Cup
3. Sharpie Marker
4. 2 18oz plastic cups
5. Clock for timer
6. Masking Tape
Controlled Variables:
1. Same amounts of water each time
2. Used same freezer
3. Used same size cups
Procedure for Experiment:
1. Take the two plastic cups and label them with the tape and marker. One cup being hot water, one being cold water.
2. Measure out 1 cup of hot water and place the water in the plastic cup labeled hot water.
3. Measure out 1 cup of cold water and place the water in the plastic cup labeled cold water.
4. Place the two cups of water into the freezer
5. Every 15 minutes check the cups to see if ice has formed
6. Use the data you gathered to determine if the hot water or the cold water froze first.
7. Repeat steps 2-6 two more times to make sure you have accurate results.
Pictures of Experiment:
Data:
Theory: In all three trials the cold water froze first because the temperature of the cold water is closer to the freezing point of water than the hot water its. Hot water needs to cool far more degrees than the cold water does so it takes longs.
Materials:
1. Freezer
2. 1 Cup Measuring Cup
3. Sharpie Marker
4. 2 18oz plastic cups
5. Clock for timer
6. Masking Tape
Controlled Variables:
1. Same amounts of water each time
2. Used same freezer
3. Used same size cups
Procedure for Experiment:
1. Take the two plastic cups and label them with the tape and marker. One cup being hot water, one being cold water.
2. Measure out 1 cup of hot water and place the water in the plastic cup labeled hot water.
3. Measure out 1 cup of cold water and place the water in the plastic cup labeled cold water.
4. Place the two cups of water into the freezer
5. Every 15 minutes check the cups to see if ice has formed
6. Use the data you gathered to determine if the hot water or the cold water froze first.
7. Repeat steps 2-6 two more times to make sure you have accurate results.
Pictures of Experiment:
 |
| Cups in freezer |
Data:
Trial
|
First to have Ice
|
Trial 1
|
Cold Water
|
Trial 2
|
Cold Water
|
Trial 3
|
Cold Water
|
Problem 2: Does hot water or cold water boil first?
Hypothesis: I predict in this experiment that i will find that hot water is going to boil faster because its temperature is closer to waters boiling point than cold water will be. The molecules of the hot water will be moving faster than those of the cold water.
Materials:
1. Stove and kettles
2. 1 Cup Measuring Cup
3. Clock for timer
Controlled Variables:
1. Same amounts of water each time
2. Used same stove and kettle
3. Same temperature to heat water
Procedure for Experiment:
1. Measure out 1 cup of hot water and place the water in the kettle on the stove. Turn the heat on to the HI setting.
2. Record the time of how long it takes the water to start boiling.
3. Empty contents of kettle and wait for kettle to cool.
4. Measure out 1 cup of cold water and place the water in the kettle on the stove.
5. Record the time of how long it takes the water to start boiling.
6. Compare the two sets of date you have, one for cold water and one for hot water. Determine which boiled faster.
7. Repeat steps 1-6 two more times to get accurate results.
Pictures of Experiment:
Theory: The hot water's temperature is closer to waters boiling point than the cold waters temperature this is why after all three trials the hot water boiled faster, even though cold water boiled soon after. Hot water has a head start to get to boiling than the cold.
Materials:
1. Stove and kettles
2. 1 Cup Measuring Cup
3. Clock for timer
Controlled Variables:
1. Same amounts of water each time
2. Used same stove and kettle
3. Same temperature to heat water
Procedure for Experiment:
1. Measure out 1 cup of hot water and place the water in the kettle on the stove. Turn the heat on to the HI setting.
2. Record the time of how long it takes the water to start boiling.
3. Empty contents of kettle and wait for kettle to cool.
4. Measure out 1 cup of cold water and place the water in the kettle on the stove.
5. Record the time of how long it takes the water to start boiling.
6. Compare the two sets of date you have, one for cold water and one for hot water. Determine which boiled faster.
7. Repeat steps 1-6 two more times to get accurate results.
Pictures of Experiment:
 |
| Cold Water Boiling First |
 |
| Cold Water and Hot Water, You can see the cold water boiling first |
 |
| Trial 2 Cold Water boiling first |
 |
| Water boiling |
Data:
Water
|
Time
|
Trial
1
|
|
Hot
|
1:59
|
Cold
|
2:40
|
Trial
2
|
|
Hot
|
2:24
|
Cold
|
2:51
|
Trial
3
|
|
Hot
|
2:33
|
Cold
|
3:00
|
Theory: The hot water's temperature is closer to waters boiling point than the cold waters temperature this is why after all three trials the hot water boiled faster, even though cold water boiled soon after. Hot water has a head start to get to boiling than the cold.
Problem 3: Does salt water or regular water freeze first?
Hypothesis: I predict in this experiment that the regular water will freeze first, salt changes the properties of the water and makes it harder for it to freeze. This is because salt breaks down ice, which is why people use it on their sidewalks in the winter to melt ice. With the salt in the water i do think that it will take longer for the water to freeze because the salt is working against the ice.
Materials:
1. Freezer
2. 1 Cup Measuring Cup
3. Salt
4. 2 18oz plastic cups
5. Clock for timer
6. Masking Tape
7. Sharpie Marker
Controlled Variables:
1. Same amounts of water each time
2. Used same freezer
3. Used same size cups
Procedure for Experiment:
1. Take the two plastic cups and label them with the tape and marker. One cup being salt water, one being regular water.
2. Measure out 1 cup of water and place it in the plastic cup labeled salt water. Add 1 Tsp of salt and mix it in with the water.
3. Measure out 1 cup of water and place the water in the plastic cup labeled regular water.
4. Place the two cups of water into the freezer
5. Let the cups sit in freezer for 45 minutes then check every 5 minutes for ice. Be sure to not open the freezer in the 45 minutes that way you do not warm the water. Record data when ice forms.
6. Use the data you gathered to determine if the salt water or the regular water froze first.
7. Repeat steps 2-6 two more times to make sure you have accurate results.
Pictures of Experiment:
Data:
Theory: The regular water froze first because the salt changed the properties of the water, with the salt mixed with the water it froze slower than the regular water.
Other Information:
Hot and Cold Water atoms while in motion:
In my experiment for this activity I had the goal of answering the three questions. To answer the first question if cold or hot water will freeze first; to do this I placed hot water in one solo cup and cold water in another. I checked the cups every 15 minutes to see when ice was forming. I found in this experiment that cold water froze first in all three trials I did. In conclusion for this experiment I found that cold water will freeze faster than hot water because the cold waters temperature is closer to the freezing point than hot water so it will form ice faster. To answer the second question if hot or cold water boiled first, to answer this question I boiled and timed how long it took to get both the hot and cold water to boil. I found that in all 3 trials the hot water boiled first, this can be explained with a similar explanation to question one. Because the temperature of the hot water is closer to the boiling point than cold water the hot water will get to the boiling point faster.. Question three was asking if regular water or salt water will freeze first. To find the answer to this question I took two solo cups and filled one with regular water and one with the same temperature of water but added one tablespoon of salt and mixed it in. I found that the regular water froze first in all three trials. This is explained because salt changes the properties of water and makes it harder for ice to form.
Both of the first two experiments are related to the real world because these tips are very useful in the kitchen. Knowing what temperature water will freeze and boil first is a great piece of information to know to save you time when you are busy and needing to cook a meal. The third experiment can be linked to the real world by looking at the one main thing that is used in Wisconsin to fight ice on the roads, salt. People use salt on the roads, sidewalks, and even when cooking to change the properties of the water to get the desired effect that they want.
Materials:
1. Freezer
2. 1 Cup Measuring Cup
3. Salt
4. 2 18oz plastic cups
5. Clock for timer
6. Masking Tape
7. Sharpie Marker
Controlled Variables:
1. Same amounts of water each time
2. Used same freezer
3. Used same size cups
Procedure for Experiment:
1. Take the two plastic cups and label them with the tape and marker. One cup being salt water, one being regular water.
2. Measure out 1 cup of water and place it in the plastic cup labeled salt water. Add 1 Tsp of salt and mix it in with the water.
3. Measure out 1 cup of water and place the water in the plastic cup labeled regular water.
4. Place the two cups of water into the freezer
5. Let the cups sit in freezer for 45 minutes then check every 5 minutes for ice. Be sure to not open the freezer in the 45 minutes that way you do not warm the water. Record data when ice forms.
6. Use the data you gathered to determine if the salt water or the regular water froze first.
7. Repeat steps 2-6 two more times to make sure you have accurate results.
Pictures of Experiment:
 |
| Cups in freezer |
Data:
Trial
|
First to have Ice
|
Trial 1
|
Regular Water
|
Trial 2
|
Regular Water
|
Trial 3
|
Regular Water
|
Theory: The regular water froze first because the salt changed the properties of the water, with the salt mixed with the water it froze slower than the regular water.
Other Information:
Hot and Cold Water atoms while in motion:
Water Atom:
The 3 states of matter of water:
3 Paragraphs
Everything in this world has molecules, and these molecules are always
moving. The only thing that differs between how the molecules are moving in the
different states of matter is the temperature. Water has three states of matter
solid (ice), liquid (room temperate or normal water), and gas (steam or heated
water). When water is cooled the atoms slow down and freeze into a regular
pattern, while when the water is heated the atoms get faster and move more
irregularly. In my experiment for this activity I had the goal of answering the three questions. To answer the first question if cold or hot water will freeze first; to do this I placed hot water in one solo cup and cold water in another. I checked the cups every 15 minutes to see when ice was forming. I found in this experiment that cold water froze first in all three trials I did. In conclusion for this experiment I found that cold water will freeze faster than hot water because the cold waters temperature is closer to the freezing point than hot water so it will form ice faster. To answer the second question if hot or cold water boiled first, to answer this question I boiled and timed how long it took to get both the hot and cold water to boil. I found that in all 3 trials the hot water boiled first, this can be explained with a similar explanation to question one. Because the temperature of the hot water is closer to the boiling point than cold water the hot water will get to the boiling point faster.. Question three was asking if regular water or salt water will freeze first. To find the answer to this question I took two solo cups and filled one with regular water and one with the same temperature of water but added one tablespoon of salt and mixed it in. I found that the regular water froze first in all three trials. This is explained because salt changes the properties of water and makes it harder for ice to form.
Both of the first two experiments are related to the real world because these tips are very useful in the kitchen. Knowing what temperature water will freeze and boil first is a great piece of information to know to save you time when you are busy and needing to cook a meal. The third experiment can be linked to the real world by looking at the one main thing that is used in Wisconsin to fight ice on the roads, salt. People use salt on the roads, sidewalks, and even when cooking to change the properties of the water to get the desired effect that they want.
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