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- 1. Multiple Choice
What types of phase changes will take place when we are making ice cream? (Choose all that apply)
freezing
melting
vaporization/boiling
condensation
sublimation
- 2. Multiple Choice
Why do we add salt to the ice?
To add flavor to the ice cream
to lower the temperature at which water freezes
to melt the ice faster
to completely stop the ice from ever melting
- 3. Multiple Choice
What phase change occurs when the milk mixture goes from liquid to solid ice cream?
melting
sublimation
freezing
condensation
- 4. Multiple Choice
How do the molecules in the milk mixture respond to the addition of ice & salt?
the molecules speed up
the molecules slow down
the molecules come to a stop
the molecules return to normal
- 5. Multiple Choice
What state of matter is the milk when you begin?
solid
liquid
gas
plasma
- 6. Multiple Choice
What state of matter should the milk be when you were finished?
solid
liquid
gas
plasma
- 7. Multiple Choice
What happened to the heat energy that left the milk?
the heat energy disappears
the heat energy transfers to the ice
the heat energy energy changes to electricity
the heat energy becomes a liquid
- 8. Multiple Choice
Why did the outside of the bag get wet? (Choose the best response)
condensation occurred because the moisture in the air cooled when it came in contact with the cold ice
bags leak
- 9. Multiple Choice
How could you turn your ice cream back into a liquid?
remove heat from the ice cream
freeze molecules
put it in the freezer
add heat to the ice cream
- 10. Multiple Choice
At which phase do molecules move the fastest and spread apart?
solid
liquid
gas
plastic
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