TECTONICS 1.8b

Question 1

Name the four components of the earths structure.

Answer 1

Inner core, outer core, crust, mantle

Question 2

What layer is at the top?

Answer 2

Crust.

Question 3

The outer core is made of liquid metal. True or false?

Answer 3

True.

Question 4

Thickness of outer core?

Answer 4

2,300 km thick

Question 5

Where does 90% of heat in the mantle come from?

Answer 5

Radioactive decay.

Question 6

What’s the upper mantle made of?

Answer 6

Magnesium and iron

Question 7

What two things increase as you go deeper in the mantle?

Answer 7

Temperature and pressure.

Question 8

Does pressure increase or decrease as you get closer to the crust?

Answer 8

Decrease

Question 9

The mantle is a good conductor of heat. True or false?

Answer 9

False

Question 10

The mantles is less dense than magma. True of false?

Answer 10

False

Question 11

The density of magma causes it to do what?

Answer 11

Rise up through cracks in the crust.

Question 12

Define ridge push.

Answer 12

The mid ocean ridge slides and is pulled apart under the force of gravity.

Question 13

Rocks have a _____ pattern of polarity?

Answer 13

Symmetrical