Name _________________________________

Session________________________________

Teacher_______________________________

Date_________________________________

Materials List
1 ice cube
1 very small block of dry ice
2 Ziploc plastic bag
Clock with a second hand.

Procedure
1. Get an ice cube and place it in a plastic bag. Seal the plastic bag so nothing can get out.
2. Get a small block of dry ice and place it in a plastic bag. Seal the plastic bag so nothing can get out.
3. Place the dry ice and bag on the table and observe what happens.
4. At the same time, see how quickly you can get the ice cube to change into liquid water.
5. Record the initial time.___
6. Record the final time (after ice is melted.)___
7. How did you try to speed up the melting? Why did you do this?

 

 

 

8. Draw pictures and describe what you think is happening when the ice changes to liquid water. Include molecules in your drawings and written
explanations.

9. Draw pictures and describe what you think is happening as the dry ice changes. Include molecules in your drawings and written
explanations.

10. Are ice and liquid water the same thing? Explain your answer.

 

 

 

11. Suppose you kept both bags with the different kinds of ice in a freezer. Would anything happen? Explain your answer.