Water in the Atmosphere

The change in state from a gas to a liquid.

• Evaportaion

• Condensation

Any form of water that falls from clouds and reaches Earth’s surface as rain, snow, sleet or hail.

• Dew Point

• Humidity

• Precipitation

• Relative Humitity

The continual movement of water among Earth’s atmosphere, oceans, and land surface through evaporation, condensation and precipitation.

• Water Cycle

• Evaporation

• Condensation

• Dew Point

The amount of water vapor in a given volume of air.

• Humidity

• Relative Humidity

The process by which molecules at the surface of a liquid absorb enough energy to change to a gas.

• Condensation

• Evaporation

The temperature at which condensation begins.

• Water Cycle

• Dew Point

• Relative Humidity

• Evaporation

The percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature.

• Humidity

• Relative Humidity

Colin knows that the water cycle follows certain steps in a repeating cycle. When the sun heats water molecules, they increase speed and collide. On Sunday he noticed that a puddle on the sidewalk was getting smaller over time. Which step in the water cycle would Colin predict is occurring?

• Precipitation

• Evaporation

• Condensation

• Crystallization

The meteorologist talked about how humidity affects weather and then predicted the humidity for the next week. Knowing that the amount of humidity would affect the coming weather, what does the amount of humidity on Tuesday indicate?

• There will be a low level of air pressure on that day.

• There will be a high level of air pressure on that day.

• There will be a low level of water vapor in the air on that day.

• There will be a high level of water vapor in the air on that day.

Colin knows that as water moves through the water cycle, condensation also takes place. Condensation occurs when water vapor cools and the water vapor must attach to a particle in the air, such as dust or smoke particles. Which is the first day of the week that shows evidence of condensation occurring?

• Monday

• Tuesday

• Wednesday

• Thursday