Natural Resources

The Atmosphere is...

• the gases that surround the Earth, protecting life and providing key resources.

• all of the waters of the Earth, including oceans, lakes and rivers.

• all of the ecosystems of the Earth, including living and nonliving components.

• all of the rocks, minerals and mineral resources found on Earth.

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Fossil fuels are natural resources that formed from:

• meteorites that struck Earth over millions of years.

• the remains of dinosaurs.

• the remains of plants and animals that were buried millions of years ago.

• plants and animals that have decayed over the past several hundred years.

Which is not a way humans depend on fresh water as a resource?

• Humans need water to drink.

• Humans need water to clean fruits and vegetables before eating.

• Humans need water to help grow their crops.

• Humans need water to power their cars.

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What happens when an area is reforested?

• Additional tree species are planted in a forest to increase its biodiversity.

• After trees have been cut down, the area is left alone to recover naturally.

• After trees have been cut down, new trees are planted to replace them.

• Trees are planted in grasslands and other ecosystems to convert them into forests.

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Which best represents a nonrenewable resource?

• timber, which comes from trees that die once they are cut down

• fish, which die once they are caught, making it hard to create new fish

• biofuel, which is created using components of plants and animals

• oil, which formed deep within the planet millions of years ago and is held in oil reserves

Which resources come from the biosphere?

• metals

• minerals

• natural gas

• lumber

The biosphere includes:

• all regions of the Earth where life exists.

• only land areas of the Earth where life exists.

• only regions of the Earth where there is no life.

• only bodies of water where life exists.

What is the best example of a mineral?

• Oil

• Charcoal

• Talc

• Sand

Farmers in dry areas irrigate the land. What does this do?

• It provides plants with the water they need, allowing for extra water in dry areas and avoiding

  wasting water in wetter areas.

• It increases the amount of fresh water available to the rest of the population.

• It allows plants in wetter areas of the country to dry out so they can continue to grow.

• It allows farmers to save money and still increase the amount of water they use.

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Smog is best described as which kind of pollution?

• air pollution

• land pollution

• noise pollution

• water pollution