Thermal Physics 1

which statement about evaporation is correct?

• Evaporation causes the temperature of the remaining liquid to decrease.

• Evaporation does not occur from a cold liquid near its freezing point.

• Evaporation does not occur from a dense liquid, such as mercury.

• Evaporation occurs from all parts of a liquid.

What causes the random, zig-zag movement (Brownian motion) of smoke particles suspended in the air?

• air molecules colliding with smoke particles

• convection currents as the hot smoke rises

• smoke particles colliding with each other

• smoke particles reacting with oxygen molecules in the air

• A

• B

• C

• D

What could the portion PQ of the graph represent?

• gas condensing

• gas cooling

• liquid cooling

• liquid solidifying

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• The brass contracts more than the iron.

• The brass expands more than the iron.

• The iron contracts more than the brass.

• The iron expands more than the brass.