Wind
Experiment 1

Water and air can be used interchangeably for some experiments. In this experiment we will use water. The results will show how warm air reacts in cool surroundings and how cool air reacts in warm surroundings.

Materials needed:
1. clear fish bowl (or any fairly large, see through container which will hold     liquid)
2. blue food coloring
3. red food coloring
4. brown food coloring
5. source of heat (a hot plate will work well)
6. plenty of ice
7. water
8. three (3) small cups

Part I
Step 1. Fill the fish bowl with tap water, not hot or cold
Step 2. Fill a small cup with the same temperature tap water
Step 3. Place a generous amount of brown food coloring into the cup of water
Step 4. Pour the cup of brown water into the fish bowl
Step 5. Record your results

Part II
Warm Air (or water) Rises
Step 1. Rinse the fish bowl
Step 2. Fill the fish bowl with Ice (Only fill the bowl ¼ full)
Step 3. Fill the fish bowl with water
Step 4. Stir the ice and water until the ice is nearly(or completely) melted
Step 5. If warm/hot tap water is available. The water doesn't have to be extremely hot, but warmer will work better
Step 6. Place a generous amount of red food coloring into the cup of warm water
Step 7. Pour the cup of red, warm water into the cool water of the fish bowl
Step 6. Record your results and compare them to Part I

Part III
Cool Air (or water) sinks
Step 1. Rinse the fish bowl
Step 2. Fill the fish bowl with hot water
Step 3. Fill the cup with ice and water
Step 4. Stir the cup of ice water until the ice is nearly (or completely) melted
Step 5. Place a generous amount of blue food coloring into the cup of cold water
Step 6. Pour the cup of blue, cold water into the warm water of the fish bowl
Step 7. Record your results and compare them to Part II

The results from the activity should reflect the rising of warm water and sinking of cold water. The atmosphere behaves in much the same way.