Activity 1

Activity 1

1. Does hot water or cold water freeze faster?

Answer: Cold Water

Questions:

1. Pictures of your experimental materials

 

Ice cube tray

Masking tape

Pen

Timer Cell Phone  

Sink

Freezer

1 cup measuring cup

Sauce pan

Stove

2. Your procedure/method.

1. Collect all materials

2. Turn one stovetop burner on high

3. Measure out 2 cups of water and pour into saucepan

4. Place sauce pan on stove; wait until water is just starting to boil

5. Take saucepan off stove

6.  Label 2 ice cube tray slots with the following: hot and cold

7. Use 1 cup measuring cup to pour hot water from saucepan into ice cube tray slot that is labeled “hot” until it is about ¾ full

8. Pour water from sink into one ice cube tray slot that is labeled “cold” until it is about ¾ full

9. Place ice cube tray into freezer

10. Set timer for 5 minutes

11. Check Ice Cube Tray every 5 minutes until both cubes are completely frozen, keep track of what relative time each cube froze at.

3. Data in the form of a graph or table with independent and dependent variables

Tests	Hot Water (Dependent)	Cold Water (Independent)
1	105 min.	60 min.
2	100 min.	55 min.
3	115 min.	60 min.

4. Show data of experiment repeated three times.

See table above

5. List your controlled variables for your experiment

My controlled variable for this experiment would be the hot water.

6. Formulate a theory that answers the questions posed.

Hypothesis: Cold water will freeze faster than hot water.

7. What are the average values?

The average values of this experiment are as follows:

Average Freeze Time of Dependent	Average Freeze Time of Independent
106.67 min.	58.33 min.

2. Does hot water or cold water boil faster?

Answer: Hot water

Questions:

1. Pictures of your experimental materials

 

Timer Cell Phone

Sink

1 cup measuring cup

2 Sauce pans

Stove

3 Ice cubes

1 glass

Pot holder

2. Your procedure/method.

1. Collect all materials

2. Fill glass with 2 cups water and 3 ice cubes

3. Turn stove top burner on high

4. Fill one saucepan with 2 cups water; place sauce pan on stove top burner

5. Take sauce pan off burner just before water starts to boil.

6. Place saucepan with hot water on pot holder to cool down for 2 minutes; set timer

7. Keep burner on while waiting

8. Place saucepan back on stove top and start timer. Record time of full boil. Take sauce pan off stove and place on pot holder

9. Take two cups of cold water and place in empty sauce pan.

10. Place cold water saucepan on stove top burner and start timer. Record time of full boil.

3. Data in the form of a graph or table with independent and dependent variables

Tests	Hot Water (Dependent)	Cold Water (Independent)
1	63 sec.	72 sec.
2	49 sec.	78 sec.
3	54 sec.	73 sec.

4. Show data of experiment repeated three times.

See table above.

5. List your controlled variables for your experiment

My controlled variables in this experiment would be the hot water and the cold water.

6. Formulate a theory that answers the questions posed.

Hypothesis: Hot water will boil faster than cold water.

7. What are the average values?

The average values of this experiment are as follows:

Average Boil Time of Dependent	Average Boil Time of Independent
55.33 sec.	74.33 sec.

3. Does salt water freeze faster or slower than regular water?

Answer: Slower

 1. Pictures of your experimental materials

Ice Cube Tray

Water

Salt

Freezer

Sink

Spoon

One glass

¼ measuring cup

Tablespoon

Timer on Cell phone

Masking Tape

Pen

2. Your procedure/method.

1. Collect all materials

2. Label two ice cube tray slots: regular and salt

3. Fill glass with ¼ cup water

4. Pour tablespoon of salt into glass of ¼ cup water

5. Mix salt and water with spoon for 30 seconds

6. Pour water from sink into one ice cube tray slot until it is about ¾ full

7. Pour salt water solution into one ice cube tray slot until it is about ¾ full

8. Place ice cube tray into freezer

9. Set timer for 5 minutes

10. Check Ice Cube Tray every 5 minutes until both cubes are completely frozen, keep track of what relative time each cube froze at.

3. Data in the form of a graph or table with independent and dependent variables

Tests	Salt Water Solution (Dependent)	Regular Water Solution (Independent)
1	160 min.	65 min.
2	145 min.	55 min.
3	155 min.	60 min.

4. Show data of experiment repeated three times.

See table above

5. List your controlled variables for your experiment

My controlled variable would be the salt that is added to the water.

6. Formulate a theory that answers the question posed.

Hypothesis: Regular Water will freeze faster than regular water.

7. What are the average values?

The average values of this experiment are as follows:

Average Freeze Time of Dependent	Average Freeze Time of Independent
153.33 min.	60 min.

Talk about the repeat-ability of an experiment? 

Because there are so many different variables to every experiment and so many possibilities for human error, it is important to repeat an experiment in order to ensure the most accurate results. It is also important to be very detailed in writing the procedure so that another scientist could repeat the experiment themselves to compare results.

These are the atoms that make up water molecules:

Video that shows how water molecules are arranged and behave in the three states of matter for water: https://www.youtube.com/watch?v=v12xG80KcZw

               

Conclusion:

Through these experiments, I was able to test the concepts of temperature and solution-base in relation to freezing and boiling points. Water freezes at thirty-two degrees Fahrenheit, while water boils at two-hundred and twelve degrees Fahrenheit. These experiments timed how fast water reached these points after changing specific variables.   

                These experiments all revolved around the same concepts, although they focused on a different point of them. The first experiment tested if cold water or hot water froze faster. I predicted that cold water would freeze faster and this was the case. The average freeze time for cold water was 58.33 minutes, while the average freeze time for hot water was 106.67 minutes. The second experiment tested if cold water or hot water would boil faster. I predicted that hot water would boil faster and this was the case. The average boil time for hot water was 55.33 seconds, as compared to the average boil time of cold water which was 74.33 seconds. The third experiment tested if salt water would freeze faster or slower than regular water. I predicted that salt water would freeze slower than regular water and this was the case. The average freeze time for salt water was 153.33 minutes, while the average freeze time for regular water was 60 minutes.

                The first experiment can be connected to the real world by how we need to have our ice in our water when we drink; if I want to have ice water at 5 P.M. and I fill up the ice tray at 4 P.M., will it need to be filled with very cold water or very hot water to speed up the process? The answer to this question would be very cold water due to the results of this experiment. The second experiment can be connected to the real world by how we cook our dinner at night. If I need to make pasta in quick amount of time before the family is ready to eat, which will boil faster: hot water or cold water? The answer is hot water due to the results of this experiment. The third experiment can be connected to the real world by how it connects to our oceans. Our ocean water never freezes due to the fact that it is in such large quantities and that it is filled with salt.