Layers of Earth

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created 3 years ago by sandrarich
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Convection Currents
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1

Which of the layers of the Earth is the hottest? ___________

inner core

2

Which of the Earth's layers is the thinnest?

crust

3

The Earth's core is made of two parts-

the inner and outer core.

The inner core is made mostly of ______

solid metal

4

Which layer of the Earth is the coolest in temperature?

the crust

5

What is the average density of the Earth's inner core?

15 g/m 3

6

The Earth's tectonic plates are in constant motion due to several factors. Temperature and density differences in the plates cause push and pull forces that move the plates.

mantle convection

7

The Atlantic ocean is currently growing wider as its floor enlarges due to the process of sea-floor spreading. In sea-floor spreading, pieces of oceanic crust.

move apart along a divergent plate boundary

8

Which of the following parts of the Earth is a solid composed of nickel and iron?

inner core

9

which layer of the Earth contains most of the Earth's mass?

mantle

10

What area of the Earth's mantle is the densest?

the area nearest to the Earth's core

11

Which of the following list the Earth's layers in order from hottest to coldest in temperature?

inner core, outer core,mantle, crust

12

Which of the following is found in large quantities in the Earth's crust?

silicon

13

Why do lithosphere plates move constantly?

convection currents

14

Which of the following is located at the center of the Earth?

asthenosphere

15

Convection currents are responsible for what process?

plate tectonics

16

Convection in the mantle can be best described as..............

a material heating up, becoming less dense, and rising to the surface.