Science

6th -

9thgrade

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Earth's Layers & Plate Tectonics

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  • 1. Multiple Choice
    2 minutes
    1 pt

    Michael and Jose are studying about plate tectonics. They learned that plates usually move a few centimeters every year. They learned that the movement of heated material caused the plates to move. In which layer does the heated material move?

    Inner Core

    Outer Core

    Mantle

    Crust

  • 2. Multiple Choice
    2 minutes
    1 pt

    The Atlantic Ocean is growing in size by about one centimeter per year. How does an ocean become larger?

    Oceanic plates are moving apart.

    The density of the oceanic plates is decreasing.

    Increased air temperatures are increasing evaporation.

    Trenches are formed by oceanic plates sliding under continental plates.

  • 3. Multiple Choice
    2 minutes
    1 pt

    In some places on Earth, large tectonic plates are moving toward each other and collide with great force. One such place is where the Indian plate and the Eurasian plate meet.

    What would you expect to occur where these two tectonic plates collide?

    Only volcanoes

    Only earthquakes

    A rift valley and volcanoes

    Mountains and earthquakes

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