Earth Science Grade 4-5

Earth Science: Layers of the Earth

Explore the crust, mantle, outer core, and inner core

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Explore the crust, mantle, outer core, and inner core

Earth Science - Grade 4-5

Instructions: Read each problem carefully. Use complete sentences when explaining your thinking. Show your work in the space provided.
  1. 1
    Cutaway Earth diagram showing crust, mantle, outer core, and inner core.

    List the four main layers of Earth in order from the outside to the center.

  2. 2
    Earth cutaway emphasizing the thin outer crust under continents and oceans.

    Which layer of Earth is the thin, solid outer layer that includes the continents and ocean floor?

  3. 3
    Comparison of thin crust and thick rocky mantle.

    The mantle is thicker than the crust. Describe one way the mantle is different from the crust.

  4. 4
    Earth cutaway highlighting the liquid metal outer core around the inner core.

    Which layer is made of liquid metal and surrounds the inner core?

  5. 5
    Earth cutaway emphasizing the hot solid inner core at the center.

    Which layer is the hottest and deepest solid layer of Earth?

  6. 6
    Inner core squeezed by pressure from surrounding Earth layers.

    Explain why the inner core is solid even though it is extremely hot.

  7. 7
    Earth cross-section showing the crust is much thinner than the mantle.

    A student says, "The crust is the thickest layer of Earth because it is the layer we see." Is the student correct? Explain.

  8. 8
    Unlabeled Earth layer model with blank leader lines to four layers.

    Label the layers in this model: A is the thin outside layer, B is the thick rocky layer, C is the liquid metal layer, and D is the solid metal center.

  9. 9
    Sliced fruit beside Earth cutaway showing a model for Earth layers.

    Why is a peach or avocado sometimes used as a model for Earth’s layers?

  10. 10
    Earth cutaway with colors getting hotter toward the center.

    Describe what happens to temperature as you travel from Earth’s crust toward the inner core.

  11. 11
    Mantle convection currents moving crust at Earth’s surface.

    The mantle contains very hot rock that moves slowly. How can this slow movement affect Earth’s surface?

  12. 12
    Cut egg beside Earth cutaway comparing the shell to Earth’s crust.

    Choose the correct comparison: The crust is like the shell of an egg, the white of an egg, or the yolk of an egg. Explain your choice.

  13. 13
    Outer core shown as liquid around a solid inner core.

    What is the difference between the outer core and the inner core?

  14. 14
    Earth layers shown with colors from coolest crust to hottest inner core.

    Put these layers in order from coolest to hottest: inner core, crust, mantle, outer core.

  15. 15
    Simple unlabeled Earth cross-section showing all four main layers.

    Draw or describe a simple cross-section of Earth that shows all four main layers. Include one fact about each layer.

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