Pure Water Project:
Part A: Watch this video on the Structure of Water (click here) and answer the questions in your performance task.
Part B: Watch this video on the Properties of Water (click here) and answer the questions in your performance task.
Part C:
Step 1: Watch this demonstration on cohesion (click here) and answer the questions below.
1. What is cohesion?
2. Describe what the scientist did during this demonstration.
3. What was your observation of the water on the penny as the scientists added more drops of water?
4. How many drops of water did the penny hold?
5. Explain why the water formed a dome over the penny and prevented the water from falling off?
6. What force caused the water to eventually fall off the penny?
Step 2: Watch this demonstration on surface tension (click here) and answer the questions below.
1. Describe what the scientist did during this demonstration.
2. Describe your observations during the experiment.
3. What occurred in the water that allowed the penny to float?
4. What occurred in the water that forced the penny to sink when the detergent was added?
Step 3: Watch this demonstration on adhesion and capillary action (click here) and answer the questions below.
1. What is adhesion? How is it different than cohesion?
2. Describe what the scientist did in this demonstration?
3. What happened to the water level on the piece of paper dipped into the beaker with water?
4. What happened when the dry glass slides were pressed against each other?
5. What happened when the wet glass slides were pressed against each other?
6. What evidence did you see of adhesion and cohesion in the glass slides?
7. In the graduated cylinder, what caused the water to be higher on the sides of the cylinder?
8. How does the water traveling up the paper demonstrate how water may travel upwards away from the roots to deliver water to all parts of the plant?
Step 4: Watch this demonstration on specific heat (click here) and answer the questions below.
1. What is specific heat.
2. Describe what happened during this demonstration.
3. As in the water balloon, large bodies of water (e.g. oceans, lakes, ponds, etc) absorb a lot of heat energy with only small changes in temperature. Why would this benefit organisms living in large bodies of water?
4. At a cellular level, billions of chemical reactions produce heat each second as a byproduct.
A. What should your internal temperature be? Research this question if necessary.
B. What would happen if your body didn't have water and all those chemical reactions occurred?
C. What does water allow the body to maintain? How does it do this? Hint: Look up homeostasis, which is a characteristic of life.
Part A: Watch this video on the Structure of Water (click here) and answer the questions in your performance task.
Part B: Watch this video on the Properties of Water (click here) and answer the questions in your performance task.
Part C:
Step 1: Watch this demonstration on cohesion (click here) and answer the questions below.
1. What is cohesion?
2. Describe what the scientist did during this demonstration.
3. What was your observation of the water on the penny as the scientists added more drops of water?
4. How many drops of water did the penny hold?
5. Explain why the water formed a dome over the penny and prevented the water from falling off?
6. What force caused the water to eventually fall off the penny?
Step 2: Watch this demonstration on surface tension (click here) and answer the questions below.
1. Describe what the scientist did during this demonstration.
2. Describe your observations during the experiment.
3. What occurred in the water that allowed the penny to float?
4. What occurred in the water that forced the penny to sink when the detergent was added?
Step 3: Watch this demonstration on adhesion and capillary action (click here) and answer the questions below.
1. What is adhesion? How is it different than cohesion?
2. Describe what the scientist did in this demonstration?
3. What happened to the water level on the piece of paper dipped into the beaker with water?
4. What happened when the dry glass slides were pressed against each other?
5. What happened when the wet glass slides were pressed against each other?
6. What evidence did you see of adhesion and cohesion in the glass slides?
7. In the graduated cylinder, what caused the water to be higher on the sides of the cylinder?
8. How does the water traveling up the paper demonstrate how water may travel upwards away from the roots to deliver water to all parts of the plant?
Step 4: Watch this demonstration on specific heat (click here) and answer the questions below.
1. What is specific heat.
2. Describe what happened during this demonstration.
3. As in the water balloon, large bodies of water (e.g. oceans, lakes, ponds, etc) absorb a lot of heat energy with only small changes in temperature. Why would this benefit organisms living in large bodies of water?
4. At a cellular level, billions of chemical reactions produce heat each second as a byproduct.
A. What should your internal temperature be? Research this question if necessary.
B. What would happen if your body didn't have water and all those chemical reactions occurred?
C. What does water allow the body to maintain? How does it do this? Hint: Look up homeostasis, which is a characteristic of life.