A chemical that kills harmful insects and weeds.

A gas that traps the sun's heat over earth.

A source of energy that uses flowing water to produce electrcity.

Very dry,having almost no rainfall.

The largest forest area that stretches through northern Russia,Canada, and other northern countries.

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Russia Key Term

7th Grade SS

Term	Definition
Pesticide	A chemical that kills harmful insects and weeds.
Landmass	A very large area of land.
Greenhouse gas	A gas that traps the sun's heat over earth.
Permafrost	Permanently frozen ground.
Hydroelecttric power	A source of energy that uses flowing water to produce electrcity.
Arid	Very dry,having almost no rainfall.
Taiga	The largest forest area that stretches through northern Russia,Canada, and other northern countries.