Imprimir Test: science ()

1.

sublimation occurs when

A.

ice melts to form liquid water

B.

water boils to form water vapor

C.

gaseous carbon dioxide forms dry ice

2.

The melting point of water is 0°c. Its freezing point is

A.

100°c

B.

0°c

C.

50°c

3.

Name the process that best describes the direct change of a solid to a gas

A.

melting

B.

evaporation

C.

sublimation

4.

In a gas, particles are

A.

closely packed in a regular pattern

B.

moving freely and close to one another

C.

colliding and bouncing in vaious directions

5.

When water vapor cools down it is

A.

vaporizing

B.

condensing

C.

melting

D.

solidifying