A Drop of Water

What are molecules in a liquid doing all the time?

• swelling and shrinking

• changing shape

• pushing and pulling each other

• giving off electrical charges

What does heating water in a kettle do?

• It locks the water molecules together.

• It speeds evaporation of the water.

• It makes the water lose energy.

• It shrinks the water molecules.

Condensation happens when water vapor molecules

• make their way into spaces in the soil

• travel from a puddle into the air

• stick to the coldest part of a glass

• fall to the ground as hail

To form a cloud droplet, water vapor must first

• drop to a temperature below freezing

• move at nearly the speed of light

• take up oxygen from the air

• condense a particle of dust

How can water trnsform rays of white light into the colors of the rainbow?

• by bouncing the light back in the direction it cam from

• by bending the light as it enters the water

• by taking some of the energy from the light

• by changing some of the light to water vapor