- 1. The coolest layer of the earth is
A) mantle
B) crust
C) inner core
D) outer core
- 2. The crust is made mostly of
A) iron and nickel
B) oxygen and silicon
C) copper and magnesium
D) nitrogen
- 3. The mantle is the largest layer
A) False
B) True
- 4. An egg shell is a good model of the crust because
A) It's solid
B) it can be cracked into pieces like plates
C) it covers the outer surface of the egg
D) All of the choices
- 5. The only difference between the inner an out core is the temperature
A) True
B) False
- 6. Scientists have never been able to see the mantle or core of the earth
A) True
B) False
- 7. The muck lab was to represent the earth's
A) mess
B) crust
C) mantle
D) inner core
- 8. The crust is also called the
A) hydrosphere
B) biosphere
C) lithosphere
D) atmosphere
- 9. Scientists believe that the mantle's convection currents are caused by the heat of
A) core
B) volcanoes
C) sun
D) crust
- 10. Convection currents move the plates on the earth's surface
A) false
B) true
- 11. These convection currents in the diagram are correct.
A) true
B) false
- 12. The convection currents keep the earth's surface the same over time.
A) false
B) true
- 13. The deeper into the earth you go, the hotter the temperature.
A) false
B) true
- 14. If the earth's core was cold, the mantle would become solid rock.
A) false
B) true
- 15. Scientists have photographed the earth's mantle which is how they know about the currents.
A) true
B) false
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