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Physicalprocess soil erosion

Naturalresources fossils

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

South Atlantic ocean

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

older or younger?

Grow old

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.

160,000,000 years ago

A convection current of magma is made up of.

A rising less dense liquid and a sinking more dense liquid

Plate tectonics describes movements mainly in

Earths crust

What is the last stage in the production of soil?

Fungi and bacteria break down organic matter.

Soil is made up of…

Weather rock and organic matter

What process is mainly responsible for producing

minerals and nutrients in very young soil.

Production of acids by bacteria and fungi.

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

Topsoil, subsoil, bedrock.

Which of the following contains organic materials.?Unweathered rock

grasswater

Grass.

What is mainly responsible for preventing erosion, choose one of

the following. Mining

Farming

Rooting of plants

Logging.

Rooting of plants

Which human activity is related to loggoing.

Clear-cutting.

A landslide is an example of .

Erosion.

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

Central.

What was the main cause of the dust bowl.

Drought.

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

A windbreak conserves

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

water per day

Flushing toilets

How can we prevent automobile air pollution?

Switching to cars that run on electricity.

How is farming most likely to produce water pollution.

Fertilizers may enter bodies of water.

Only changes in earths climates over time.

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

The hill was once under the sea.

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

Once was warmer than it is now

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

could you conclude.

The river once flowed through the desert.

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?

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

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