Show:
Water Cycle
Clouds
Weather
Vocabulary
Air and Relative Humidity
Phase Changes
100
Nature’s way of recycling water.
What is the water cycle?
100
Gray clouds that cover the lower part of the sky; rain or snow falls from them
What are stratus clouds?
100
The state of the air at a certain time and place
What is weather?
100

This happens when air expands

It cools

100

Changing from the solid to liquid state

What is melting?

200
The process of water changing into an invisible gas called water vapor
What is evaporation?
200
White, puffy clouds that look like piles of cotton; they are known as fair-weather clouds
What are cumulus clouds?
200
Scientists who study weather
Who are meteorologists?
200

List two ways that relative humidity can be changed

Temperature and pressure

200
Where you should go during a tornado if you are in a school or public building
What is the lowest level of the building?
300
Amount of water vapor in the air
What is humidity?
300
Thin, feathery clouds that appear high in the sky; they are a sign that rain or snow is on the way
What are cirrus clouds?
300

Instrument that measures relative humidity

What is a hygrometer or sling psychrometer?

300

a visible mixture of tiny droplets of water or tiny crystals of ice.

What is a cloud?

300

Changing from the gas to the liquid state

What is condensation?

400
The process of water vapor turning into water droplets
What is condensation?
400
Cloud that forms at the earth’s surface
What is fog?
400

Tiny bits of particulate matter that serve as surfaces on which water vapor condenses

What is a condensation nuclei?

400

The best type of condensation nuclei because it absorbs water vapor

What is a ocean salt?

400

Changing from the solid to the gas state without moving through the liquid state

What is sublimation?

500

The condition of water droplets that remain in the liquid state at temperature well below 0 C

Supercooled water

500
Tall, dark clouds that mean thunderstorms with heavy rain and strong winds
What are cumulonimbus clouds?
500
The weather of a place over a long time
What is climate?
500

The ratio of air’s actual water-vapor content to the amount of water needed for saturation

What is relative humidity?

500

Changing from the gas to the solid state without going through the liquid state

What is deposition?