Category #1
Category #2
Category #3
Category #4
Category #5

100

The oceans cover about what percentage of Earth?
75 percent

100

What is the top level of groundwater in an aquifer called?
water table

100

Frozen raindrops falling from clouds are called
sleet

100

Sometimes, water vapor on a surface may freeze without first becoming liquid water. What forms when this occurs?
Frost

100

What carries warm water toward the poles?
currents

200

Water that fills spaces between particles of rock and soil is
groundwater

200

Dew forms during which part of the water cycle?
condensation

200

When air moves upward to areas of less air pressure, what often forms?
clouds

200

Which best describes rivers, streams, and lakes?
surface freshwater

200

How does an iceberg form?
An iceberg forms when a large piece of ice breaks off a glacier or ice sheet.

300

A liter of cold water with high salinity _________ than a liter of warm water with low salinity.
is heavier

300

Name a process that does not involve water vapor.
Groundwater flows into the ocean.

300

In the summer sky many clouds are made of _________.
ice crystals

300

What type of cloud is found at mid-altitude and looks like small puffy white balls?
Cumulus clouds

300

How are evaporation and sublimation alike?
During both water vapor is formed.

400

Name the first stage of the water cycle.
Evaporation

400

Name the second stage of the water cycle.
condensation

400

Name the third stage of the water cycle.
precipitation

400

Name the final stage of the water cycle.
run off

400

What is the name of a cloud that is vertical and are often the sign of a storm?
Thunderheads

500

What happens during evaporation?
Liquid water turns into water vapor.

500

What occurs during sublimation?
ice turns directly into water vapor, without turning into liquid first.

500

Which process is slower, sublimation or evaporation?
sublimation

500

Describe how Cirrus clouds look and at what altitude they are found.
Cirrus clouds are thin, whispy, and white. They are found at high altitudes.

500

Describe what stratus clouds look like and at what altitudes they are found.
They are dark and cover the whole sky. They are found at low altitudes.