# Earth's Layers mini-quiz

```Unit 06a - Earth's Layers and Rock Cycle - Unit Assessment
SC.7.E.6.1 – Layers of Earth
Match the description of each layer with its name:
______ 1.
______ 2.
______ 3.
______ 4.
______ 5.
This layer is made of molten, liquid rock
This layer is made of molten, liquid metal.
This layer contains about 80% of Earth’s volume.
This layer is made of solid iron and nickel.
This is the thinnest layer of the Earth.
WORD BANK: Some words you use more than one time.
a. Crust
b. inner core
c. mantle
d. outer core
6. The temperature of the ____________ is as hot as our Sun.
a. Inner core
b. Asthenosphere
c. Mantle
d. Lithosphere
7. The correct order of layers from the outside layer down to the innermost layer is...
a. Outer core, inner core, mantle, crust
b. Inner core, outer core, mantle, crust
c. Crust, mantle, inner core, outer core
d. Crust, mantle, outer core, inner core
Unit 06a - Earth's Layers and Rock Cycle - Unit Assessment
8. The Earth acts like a giant magnet because of:
a.
b.
c.
d.
A massive beam of metal that runs from the North Pole into the Earth and out the South Pole
Solar winds of the Sun hitting the Earth
Hot, spinning, liquid magnetic metal in the outer
Hot, flowing, liquid rock in the mantle
9. How does thermal energy move from the outer core to the crust?
a.
b.
c.
d.
through radiation of thermal energy in the mantle.
through convection of thermal energy in the mantle.
through conduction of thermal energy in the mantle.
through transmission of thermal energy in the mantle.
10. As you dig deeper into the Earth, the temperature:
a. Decreases
b. Stays the same
c. Fluctuates up and down
d. Increases
Below is a simple diagram of the Earth' layers.
11. Which of the layers would be described as having the lowest density, thin and rocky?
a. layer V
b. layer W
c. layer Y
d. layer Z
12. Which of the following statements best describes the outer core?
a. The outer core is the middle layer of Earth, and contains the most heat.
b. The outer core is a dense, solid layer, and is responsible for the motion of Earth's plates.
c. The outer core is the outermost layer of Earth, and varies in temperature and thickness.
d. The outer core is a liquid layer that rotates around the inner core, and is responsible for Earth's
magnetic field.
Unit 06a - Earth's Layers and Rock Cycle - Unit Assessment
Junior is working on completing his science journal notes on Earth's layers.
13. Which statement should Junior use to best describe the Earth's inner core?
a. It is a dense solid, under the most pressure with the highest temperatures.
b. It is thin and loose, composed of rocks and soil and under the least amount of pressure.
c. It is made up of very hot rock that flows under pressure creating very slow-moving currents.
d. It is a shell of liquid iron with very high temperature and pressure and creates Earth's magnetic
field.
SC.7.E.6.2 – Rock Cycle
14. What type of rock comes from the cooling of magma and lava?
a. Sedimentary
b. Igneous
c. Metamorphic
d. Mineral
15. What geologic processes make the material that becomes sedimentary rock?
a. Melting and cooling
b. Heat and pressure
c. Weathering and erosion
d. Melting and pressure
The image below shows a rock sample that was collected:
16. This rock is made up of layers that have been pressed down (compaction) by water and when the water
evaporates the minerals in the water have bonded the layers into rock. What type of rock is shown
above?
a. Sedimentary
b. Igneous
c. Metamorphic
d. Mineral
Unit 06a - Earth's Layers and Rock Cycle - Unit Assessment
Use the following rock cycle model to answer the following question.
17. Which of the following events must occur at point 6 in order to transform sedimentary rock into igneous
rock?
a. Extreme winds and storms weather the sedimentary rock into particles, which collect in rivers
and are compacted into igneous rock.
b. Rising oceans erode mountains of sedimentary rock into particles, which sink and get
compacted into layers that form igneous rock.
c. Tectonic plates push against each other, driving sedimentary rock under Earth's surface, where
it melts into magma and turns into igneous rock as it cools.
d. Shifting tectonic plates push the sedimentary rock toward the poles, where it freezes and
hardens into igneous rock.
```