Unit 3: Earth's Interior & Plate Tectonics

Earthquakes can only form from movement along a fault line.

• true

• false

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How do volcanoes form at subduction zones?

• Subducted plates melt and form the magma that build the volcano.

• Two continental plates collide and rise up.

• Plates collide and fold up against each other.

• As plates separate, magma rises up and out of cracks in the crust.

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How and when did Earth’s atmosphere become rich with oxygen?

• volcanic outgassing; 4.6 billion years ago

• asteroid and meteor impact accrection; 3.4 billion years ago

• photosynthesizing stromatolitic cyanobacteria; ~2 billion years ago

• iron oxidation of continental rocks; 1 billion years ago

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The asthenosphere is only a portion of the mantle, made up of a solid plastic mantle rock that moves very slowly.

• True

• False

ONLY the continental crust moves around at Earth’s surface.

• True

• False

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NGSS.MS-ESS2-3

Rock closer to the mid-ocean ridge system is always older.

• True

• False

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Earth’s atmosphere has always been life sustaining for organisms.

• True

• False

Wegener’s hypothesis of continental drift was finally completely confirmed and solidified by ____________________________________

• fossils from the same reptile found on two continents.

• continental coastlines that fit together.

• evidence supporting the idea of sea-floor spreading.

• the formation of mountain ranges such as the Andes.

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Think about this . . . Suppose you found a fossil in New York state of a plant that is found today only in tropical climates.

How would you explain your discovery?

• Someone had a tropical house plant at their house in New York.

• 
  New York used to be located on the South American plate.

• 
  

  The North American plate moved and it used to be located closer to the equator.

• The tilt of the Earth changed so the equator was closer to New York.

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What is it called when hot materials from Earth’s interior move toward Earth’s cooler surface?

• convection

• conduction

• rotation

• energy transfer

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