Activity 1: Scientific Method/States of Matter

1. Hypothesis:  This experiment is to find out what freezes faster hot or cold water. I predict that the cold water will freeze faster due to the fact that the temperature of cold water is closer to freezing than hot water.

A. Materials:
1.  2 - solo 18oz plastic cups
2.  measuring cup
3.  timer
4.  freezer
8.  thermometer

B. Setup
1. Two solo cups are filled with 1/2 cup hot or cold water. Each cup is labeled with masking tape hot or cold accordingly.
2. Temperatures are recorded before putting cups in freezer. 
3.  Both cups are put in the freezer.
4.  Timer is set for 15 minutes.
5.  Temperatures are recorded or thermometer is used to tap water to check for ice.
6.  Set timer for another 15 minutes.
7.  Temperatures are recorded or thermometer is used to tap water to check for ice.
8.  Set timer for another 15 minutes.
9.  Temperatures are recorded or thermometer is used to tap water to check for ice.

C. Pictures of Experiment:

Hot and Cold Supplies

Hot and Cold in freezer

Results with Hot not freezing (left) and Cold freezing (right)

D. Data:

E. Controlled Variables:
1. Cups were the same for both hot and cold
2. The same freezer was used for both hot and cold.
3.  Both hot and cold water were measured at the same amount



2. Hypothesis:  This experiment is to find out what water will boil faster hot or cold. I predict that the hot water will boil faster due to the fact that the temperature of the water is closer to that of boiling than the cold water.

A. Materials:


B. Setup


C. Pictures of Experiment:

D. Data:

E. Controlled Variables:




3. Hypothesis:  This experiment is to find out whether salt water will freeze faster or slower than regular water. My prediction is that the regular water will freeze faster since salt lowers the freezing point of ice when we dump salt on it in the winter time.

A. Materials:
1.  2 - solo 18oz plastic cups
2.  measuring cup
3.  timer
4.  freezer
8.  thermometer
9. 1 tablespoon of salt

B. Setup
1. Two solo cups are filled with 1/2 cup tap water of the same temperature. Each cup is labeled with masking tape salt or regular water. The salt is mixed well to completely dissolve.
2. Both cups are put in the freezer.3.  Timer is set for 15 minutes.
4.  Temperatures are recorded or thermometer is used to tap water to check for ice.
5.  Set timer for another 15 minutes.
6.  Temperatures are recorded or thermometer is used to tap water to check for ice.
7.  Set timer for another 15 minutes.
8.  Temperatures are recorded or thermometer is used to tap water to check for ice.

C. Pictures of Experiment:

Supplies

Regular and Salt water in freezer

Regular (left) frozen and Salt (right) not frozen

D. Data:

E. Controlled Variables:
1. Cups were the same for both salt and regular water.
2. The same freezer was used for both salt and regular water.

3.  Both salt and regular water were measured at the same amount