Science 3: Changes in State of Matter

What is the key factor that allows matter to change from one state to another?

• Pressure

• Volume

• Energy (heat or lack thereof)

• Density

What happens to water when you put it in the freezer overnight?

• A. It turns into steam

• B. It turns into ice

• C. It disappears

• D. It stays the same

Which of these is an example of something that freezes?

• A. A sandwich in the oven

• B. Water turning into ice

• C. A rock in the sun

• D. A balloon flying in the sky

What process describes a solid turning into a liquid due to the addition of heat energy?

• Freezing

• Evaporation

• Melting

• Condensation

What is the difference between evaporation and boiling?

• Evaporation is a natural process, while boiling is an unnatural process that speeds up vaporization.

• Evaporation occurs at a specific temperature, while boiling occurs at any temperature.

• Evaporation turns liquid into solid, while boiling turns liquid into gas.

• Evaporation requires heat, while boiling requires cold.

What happens during sublimation?

• A. A solid turns into a liquid

• 
  B. A gas turns into a solid

• 
  C. A solid changes directly into a gas

• 
  D. A liquid turns into a gas

What is the process called when gas matter changes directly into solid matter, skipping the liquid state?

• Sublimation

• Condensation

• Deposition

• Freezing