Condensation
Evaporation
Systems & The water cycle
Precipitation & Dissolving
Reference Experiments
100

How does condensation work?

The water vapor in the air freezes back into a liquid when it touches the cool surface.

100

How does evaporation work?

When heat is applied to water and it turns into water vapor, a gas.

100

How does precipitation work?

When many little water droplets merge into one.
100

Explain what happened when we mixed salt into water.

It dissolved.

200

Why are waterbottles mostly wet?

Water vapor in the air condenses.

200

Define humidity and where it comes from.

Humidity comes from water vapor from evaporation. It takes the form of water in the air.

300
Why did we see little droplets of water in our two bottle system if heat is being applied?

It's evaporation, not condensation

300

Which factors affect the speed of evaporation?

If the surface area of the water increases, the longer it takes to evaporate. Also, the temperature of water matters.

400

Why is ice slippery?

The friction on the ice causes a very thin layer of water to develop on top.

400

Do all liquids evaporate?

Yes, but some liquids evaporate faster than others/

500

What is the "dew point"?

The temperature at which air can no longer hold any more water. Below this temperature the water comes out of the air in the form of drops. The temperature at which condensation occurs is known as the dew point. (Dew is simply water condensed in the atmosphere.)

500

What is the boiling point of water?

212f or 100c.

500

How can there be clouds in winter when it is too cold for water to stay a vapor?

Clouds are not made of water vapor.

500

What is crystallization's role in the water cycle?

Crystallization can be seen in the formation of snowflakes from water vapor in the atmosphere which falls during precipitation.