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Review Unit 4

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    Unit 4 Grade 4
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  • What is the outermost layer of the Earth called?
    The crust
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  • Which layer of the Earth is made of hot rock?
    The mantle
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  • Which layer of the Earth is liquid?
    Mantle and The outer core
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  • Which part of the Earth is very hot and made of metals, nickel, and iron?
    The core
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  • Name three layers inside the Earth.
    Crust, Mantle, Core
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  • Where do earthquakes happen: in the crust or the core?
    In the crust
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  • What causes earthquakes?
    Sudden movement of rocks / plates
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  • What is released when rocks suddenly move?
    Energy
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  • What do we call the waves that carry earthquake energy?
    Waves
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  • Around which ocean do most earthquakes and volcanoes occur?
    Pacific Ocean
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  • Why is the Pacific Ocean called the Ring of Fire?
    Because many volcanoes and earthquakes are around it
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  • Which country is more likely to have volcanoes: Japan or England? Why?
    Japan, because it is on the Ring of Fire
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  • Why do fish have gills?
    To breathe in water
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  • Why do birds have wings?
    To fly
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  • Why do bears have thick fur?
    To keep warm
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  • Why do giraffes have long necks?
    To reach leaves on tall trees
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