The layers inside the Earth

Grade 6 Science Worksheet - Building Confidence

Circle the best answer.

1. Read this first

   Use this

   Cutaway of the Earth, not to scale:

3. 1.

   Ari labels a cutaway of the Earth. Layer D is the ball at the very center. Which layer is D?

   • The outer core
   • The mantle
   • The inner core
   • The crust
4. 2.

   Layer A is the thin outer shell that Kira stands on every day. Which layer is A?

   Use the picture in question 1.

   • The thickest layer
   • The crust
   • The mantle
   • The core
5. 3.

   A column of four blank boxes labeled first (surface) to fourth (center). Jun lists Earth's layers from the surface inward. Which layer comes second?

   • The outer core
   • The inner core
   • The crust
   • The mantle
6. 4.

   “Poster outline:” Luz is making a poster of Earth's layers. Which list goes from the outside in?

   • Inner core, outer core, mantle, crust
   • Mantle, crust, inner core, outer core
   • Crust, outer core, mantle, inner core
   • Crust, mantle, outer core, inner core
7. 5.

   Cutaway, not to scale, with an arrow from the surface down to the center labeled "trip down". Milo imagines a trip from the crust down toward the center (with a very good snack bag). What happens to the temperature on the way?

   • It stays the same
   • It keeps falling
   • It keeps rising
   • It falls, then rises
8. 6.

   Cutaway, not to scale, with the four layers labeled crust, mantle, outer core and inner core. Noah reads that one layer of the Earth is liquid metal. Which layer is it?

   • The mantle
   • The outer core
   • The crust
   • The inner core
9. 7.

   Cutaway, not to scale, with the inner core shaded and labeled hottest. The inner core is the hottest layer. Is it solid or liquid, by Pia's reading?

   • Solid, because the pressure is enormous
   • Liquid, because it is the hottest
   • Solid, because it is the coolest layer
   • Liquid, like the mantle
10. 8.

    “Cutaway, not to scale:” Lava pours out of volcanoes. Does that mean the whole mantle is liquid, as Ren wonders?

    • No; the mantle is mostly solid, with small magma pockets
    • No; the mantle is liquid metal
    • Yes; the mantle is a sea of lava
    • Yes; the crust floats on liquid lava

11. Table (USGS, rounded), Layer thickness (USGS), with columns Layer and Thickness

    Crust about 5 km under oceans and about 30 km under continents; mantle about 2,900 km; outer core about 2,200 km; inner core about 1,250 km.

12. 9.

    Tala reads the USGS thickness table. Which layer is the thickest?

    • The outer core, about 2,200 km
    • The mantle, about 2,900 km
    • The crust, since we stand on it
    • The inner core, at the center
13. 10.

    Using the USGS thickness table, Zee looks for the thinnest layer. Which is it?

    • The inner core, since it is in the middle
    • The crust
    • The mantle, since the crust is thicker
    • The outer core