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Physicalprocess soil erosion

Naturalresources fossils

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Which ocean was produced by seafloor spreading between Africa and south America.

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South Atlantic ocean

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As distance increases from a mid ocean ridge , do the rocks get

older or younger?

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Grow old

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Assume a seafloor has been separating at an average rate of 5

centimeters a year. The sea is presently 8,000 kilometers wide. How long ago did the sea begin

to form.

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160,000,000 years ago

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A convection current of magma is made up of.

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A rising less dense liquid and a sinking more dense liquid

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Plate tectonics describes movements mainly in

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Earths crust

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What is the last stage in the production of soil?

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Fungi and bacteria break down organic matter.

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Soil is made up of…

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Weather rock and organic matter

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What process is mainly responsible for producing

minerals and nutrients in very young soil.

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Production of acids by bacteria and fungi.

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From top to bottom, what are the horizons of soil.

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Topsoil, subsoil, bedrock.

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Which of the following contains organic materials.?Unweathered rock

grasswater

air

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Grass.

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What is mainly responsible for preventing erosion, choose one of

the following. Mining

Farming

Rooting of plants

Logging.

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Rooting of plants

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Which human activity is related to loggoing.

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Clear-cutting.

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A landslide is an example of .

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Erosion.

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In what part of the united states was the dust bowl located.

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Central.

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What was the main cause of the dust bowl.

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Drought.

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Terracing is an method used to conserve, which of the following

Water

Air

Soil

Fuel

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soil

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A windbreak conserves

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Soil.

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For a family of four, what indoor use of water consumes the most

water per day

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Flushing toilets

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How can we prevent automobile air pollution?

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Switching to cars that run on electricity.

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How is farming most likely to produce water pollution.

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Fertilizers may enter bodies of water.

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Only changes in earths climates over time.

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A seashell on top of a hill most likely indicates that.

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The hill was once under the sea.

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Finding a fossil of a palm tree in Alaska could explained what about the climate of Alaska.

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Once was warmer than it is now

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If you found a fossil of a fresh water animal in a desert, what

could you conclude.

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The river once flowed through the desert.

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The fossil of a tiny horse is found in a layer of rock below the fossil of a larger horse. What can you conclude about the ages of the

fossils?

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The tiny horse fossil was older than the larger horse fossil.