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Science-Chapter 2C Make Up of the Earth

Chapter 2C Make Up of the Earth

1. What is the Earth's surface like?

            Mountains, plains, and plateaus are landforms found on the earth's surface.

            Volcanoes change the earth's surface by fomring new mountains or by destroying mountains.

            Earthquakes are caused when large sections of rocks slip past other large sections of rock. Engineers have designed buildings that can survive most earthquakes.

2. How do weathering and erosion affect the Earth's features?

            Weathering can affect landforms by breaking and changing rocks.

            Erosion can affect landforms by moving weathered rocks and soil.

            People can control erosion by planting a cover crop, plowing an planting crops in rows around hills, and planting trees on steep hills.

3. What materials make up the Earth's features?

             A mineral is nonliving, solid matter from the earth that has properties such as luster, color, and hardness.

             Some rocks form inside the earth, others form under lakes and oceans, and others form when the hea and pressure inside the earth change other rocks.

            Soil is made up of minerals, rocks and dead plants and animals.

4. What resources are found on the Earth?

            Air, water, soil, lumber, natural gas, and petroleum are some natural resources found on the earth.

            eople try to conserve natural resources by reducing the amount of natural resources they use.

           

 

Vocabulary

 

Landform        a shape of the land, such as a mountain, plain, or plateau

Volcano           a mountain formed by hardened lava with an opening through which lava, ashes, rocks, and other materials may come out

Earthquake      the shaking of the ground caused by rock movement along a fault

Fault                a crack in the earth’s crust along which rocks move

Weathering      the braking and changing of rocks

Erosion            the moving of weathered rocks and soil by wind, water, or ice

Dune               a pile of sand formed by the wind

Mineral            nonliving, solid matter from the earth

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