Pre-Assessment Phase Changes

1. A cold glass of water collect water droplets on the outside on a hot summer day. This is an example of what phase change?

• melting
• sweating
• condensation
• vaporization

2. A candle drips wax on a table. This is an example of what phase change?

• condensation
• freezing
• melting
• sublimation

3. Dry ice gives off carbon dioxide gas. This is an example of what phase change?

• condensation
• sublimation
• freezing
• melting

4. Which phase changes requires an increase in energy?

• condensation and vaporization
• melting and vaporization
• melting and freezing
• freezing and condensation

5. Which phase changes require an overall loss of energy?

• condensation and vaporization
• melting and vaporization
• melting and freezing
• freezing and condensation

6. Water is heated on a stove until steam is given off. What phase change is this?

• melting
• condensation
• freezing
• vaporization

7. The melting point of a substance is the same temperature as its ______________ point.

• condensation
• boiling
• freezing
• vaporization

8. The condensation point of a substance is the same temperature as its __________ point.

• vaporization
• melting
• freezing
• dew

9. Adding energy to a substance makes its particles move

• slower
• faster
• the same
• none of the above

10. On a cold day, a person can see their breath. This is an example of what phase change?

• melting
• freezing
• vaporization
• condensation