The gradual breaking down of rock into smaller pieces by water and wind is called

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Gradual Earth Changes Sudden Earth Changes Landforms Natural Resources The Earth
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• The gradual breaking down of rock into smaller
  pieces by water and wind is called

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• Weathering

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• The movement of weathered particles is called

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• Erosion

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• Small particles of silt, sand, and soil are
  called

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• Sediment

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• A large mountain of ice that gradually travels
  downhill, changing the surface of the earth as it
  goes, is called a

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• Glacier

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• When water gradually wears away rock underground,
  this can form.

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• A cave (or a sinkhole)

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• The movement of the earths plates can cause

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• Volcanoes and earthquakes

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• A mountain that forms as lava flows through a
  crack in earths surface is a

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• Volcano

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• A type of volcano that is made of layers of lava,
  rock and ash and erupts explosively is a

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• Composite volcano or Stratovolcano

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• The shaking of earths surface due to the
  movement of rock in the crust is

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• An earthquake

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• When great amounts of soil and rock slide down a
  slope due to water and gravity or an earthquake,
  it is called a

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• Landslide

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• When two of the earths plates meet, sometimes
  the edges crush and fold. This creates

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• A mountain chain (or mountains)

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• Are landforms usually created by the earth
  changing rapidly or slowly?

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• Slowly

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• An area with higher land around it, and that
  stretches between mountains or hills is a

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• Valley

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• The Grand Canyon in Colorado was caused by

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• Water erosion

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• Two landforms caused by the movement of sand and
  sediment are

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• Deltas and dunes

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• Naturally occurring materials that humans can use
  for energy, building, growing crops, etc. are

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• Natural resources

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• Natural resources that cannot be replaced are
  called

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• Non-renewable resources

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• A type of soil that can be used to make bricks
  and pottery is

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• Clay

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• Sources of energy, such as coal and oil, that
  come from the remains of ancient swampy forests
  are called

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• Fossil fuels

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• Two examples of hard rocks that can be used for
  building, statues, etc, are

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• Granite and marble

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• Earth has three main layers. They are

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• The crust, the mantle, and the core

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• The earths crust is broken into sections called

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• Tectonic plates (or just plates)

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• Cracks in the earths crust are called

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• Faults

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• Melted rock within the earth is called

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• Magma

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• Scientists can predict earthquakes by using an
  instrument called a

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• Seismograph