Water & its Change in State

Kevin observed water droplets forming on the outside of his milk carton after he took it out of the refrigerator. Which of the following caused the water droplets to form?

• evaporating

• freezing

• melting

• condensing

What happens to liquid water when enough heat is applied to make it boil?

• it changes state from liquid to solid

• it changes state from solid to liquid

• it changes state from liquid to gas

• it changes state from gas to liquid

After a rainstorm, Sarah observed many puddles on the sidewalks around the school. The puddles that were in the sun disappeared, but there were still some puddles left on the sidewalks in the shade. Which best explains why some of the puddles didn't disappear?

• the temperature was cooler in the shade

• the water turned into ice

• the temperature was warmer in the shade

• the water turned into water vapor

Match the following changes to the vocabulary terms.

• condensing

• liquid to gas

• freezing

• gas to liquid

• melting

• solid to liquid

• evaporating

• liquid to solid

A student puts a cup of water on the windowsill. When he checks the water a week later, there is less water in the cup. What happened to the water?

• The water condensed.

• The water boiled away.

• The water evaporated.

• The water turned to ice.

Which statement best describes condensation?

• Water vapor cools and freezes.

• Water vapor cools and evaporates.

• Water vapor cools and becomes a solid.

• Water vapor cools and becomes a liquid.

Joseph brought a cold bottle of water to the park and left it on a bench. After a few minutes, he noticed there were drops of water dripping down the sides of the water bottle. What caused the drops of water to appear on the bottle?

• the ice in the water melted and dripped down the side of the bottle

• water vapor from the air cooled and condensed on the side of the bottle

• the cold water warmed up causing excess water to drip down the side of the bottle

• water vapor was released from inside the bottle and dripped down the sides of the bottle

The change from liquid to solid is called ________________.

• Melting
• Freezing
• Evaporation
• Condensation

_______ occurs when a liquid changes to a gas below its surface as well as at the surface.

• Boiling
• Evaporation
• Freezing
• Melting

Condensation occurs when _____________ water vapour comes into contact with a cooler surface, loses heat and condenses into water droplets.

• warm

• warmer

• cold

• colder