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Most common grade of coal.
Bituminous
Water vapor in the air.
Humidity
A soft and malleable metal.
Gold
Glacier on level land.
Ice Sheet
What contains most of the earth's water?
Oceans
When pieces of glaciers, ice sheets, or ice shelves break off into the ocean and float independently.
Iceberg
This metal is strong, durable, and often used for tools or weaponry.
Iron
Layers of sand, bedrock, and gravel that hold and move ground water.
Aquifer
These resources can not be easily replaced easily.
Non-renewable
True or false: sea ice is salty
False
If a farmer let's his fields lie fallow for a year, what does that mean?
He let's his field rest without planting any crops
This form of soil conservation helps to keep water from washing healthy soil away by plowing furrows horizontally around a hill.
Contour Plowing
Lignite
Planting a low-lying crop that protects topsoil from from erosion and drought is what form of soil conservation?
Ground Cover
What percent of the earth's surface is covered by water?
3/4 or 75%
How deep is the ice sheet covering Antartica?
15,670 ft
Water becomes part of the atmosphere through ___.
Evaporation
Small plant-like organisms that make up the first link in the ocean's food chain.
Phytoplankton
When ocean water freezes it becomes ___.
Sea Ice
This percent of the world's freshwater is found in Antarctica.
70%