Ps1-3

If a box of crayons is left in a hot car on a summer afternoon, what change would you expect to observe in the crayons?

• gas changed to liquid
• liquid changed to solid
• solid changed to liquid
• liquid changed to gas

A student took ice cream outside on a summer day. The heat would cause what kind of change?

• a solid becoming a liquid
• a liquid becoming a gas
• a liquid becoming a solid 
• a gas becoming a liquid

Removing heat from water vapor causes what change in it's physical state?

• a liquid changing into a gas
• a solid changing into a gas
• a gas changing into a liquid
• a liquid changing into a solid

A drop of water was placed in a hot pan and seemed to disappear. The heat caused the water to....

• melt
• freeze
• evaporate
• gel

When an ice cube is placed on the sidewalk on a hot day, what is the series of changes to it's physical state that occurs?

• gas, solid, liquid
• solid, gas, liquid
• solid, liquid, gas
• liquid, solid, gas

Water vapor is forming a liquid on the outside of this glass because the vapor.

• loses heat when it touches the glass
• pulls cooler liquid through the glass
• becomes warmer close to the glass

After a rainstorm a group of students notices puddles on the sidewalk. Later that afternoon the students observed a change in the puddles. What caused the water in the puddle to disappear?

• shadows covered the sidewalk
• the Sun's heat evaporated the water
• the rainstorms continued all day

If a box of wax crayons was left in a hot car all of the following could happen EXCEPT?

• the crayons could change shape
• the colors could mix together
• the paper wrappers could melt

A glass of water was left outside on the coldest day of the year. The low temperature could make what change in the water? The water could...

• change color
• get a salty taste
• turn into ice

Sometimes a burning candle will have wax dripping down the side. This happens because the heat of the flame...

• turns the wax of the candle to a liquid
• causes water to collect on the candle
• uses some of the gases in the air