Energy and Changes in State Mastery Test

Select the correct answer. Why does a solid change to liquid when heat is added?

• The spacing between particles decreases.

• Particles lose energy.

• The spacing between particles increases.

• The temperature decreases.

Select the correct answer. Why does ice float on water?

• The temperature of ice is lower than the temperature of water.

• The temperature of water and ice are the same.

• The density of ice is less than the density of water.

• The density of ice is greater than the density of water.

Select the correct answer. When a perfume bottle is opened, some liquid changes to gas and the fragrance spreads around the room. Which sentence explains this?

• Gases do not have a definite volume.

• The particles of gases are closely packed.

• The force of attraction between particles in gases is very high.

• Gases are not matter.

Select the correct answer. An iron nail is made up of particles. What is true about the particles?

• They move all over the place.

• The force of attraction between them is small.

• The spacing between them is large.

• They stay in place and vibrate.

Select the correct answer. What is the process called when a solid turns into a liquid?

• Melting

• Freezing

• Condensation

• Evaporation

Which of the following characteristics match the states of matter?

• Solids have a definite shape and volume.

• Liquids have a definite volume but take the shape of their container.

• Gases have neither a definite shape nor volume.

• Plasma is an ionized gas with unique properties.