Structure Of The Earth

Question 1

The Earth has a ____________ Structure.

Answer 1

Layered.

Question 2

At the Centre of the Earth is the ______.

Answer 2

Core.

Question 3

The Core is a Ball of Solid (_______) and ________ (Outer) Iron and Nickel.

Answer 3

Inner…Liquid…

Question 4

At the Earth’s Centre, it’s Very ________. It Becomes _____ Dense Further Out.

Answer 4

Dense…Less…

Question 5

The Temperature Inside the ______ Ranges from 4400-______°C.

Answer 5

Core…6000…

Question 6

Around the Earth’s Core is the _________.

Answer 6

Mantle.

Question 7

The Mantle is Made up of Silicon-Based _______.

Answer 7

Rocks.

Question 8

The Part of the Mantle Nearest to the Core is Quite _______.

Answer 8

Rigid.

Question 9

The Layer Above the Mantle is called the ________________, which is Semi-Molten.

Answer 9

Asthenosphere.

Question 10

The Top of the Mantle is ________.

Answer 10

Rigid.

Question 11

The Temperature of the Mantle is Between 1000°C and _______°C.

Answer 11

3700.

Question 12

The Solid Outer _______ of the Earth is called the _______.

Answer 12

Layer…Crust…

Question 13

The Crust is made up of Silicon-Based _______.

Answer 13

Rocks.

Question 14

What are the Two Types of Crust?

Answer 14

Continental and Oceanic.

Question 15

Continental Crust is Thicker and _____ Dense.

Answer 15

Less.

Question 16

Oceanic Crust is Thinner and More ________.

Answer 16

Dense.

Question 17

The Crust is Divided into Slabs called ____________ Plate.

Answer 17

Tectonic.

Question 18

Tectonic Plates Move Due to ____________ Currents in the Mantle.

Answer 18

Convection.

Question 19

1) Tectonic Plates Float on the _________.

Answer 19

Mantle.

Question 20

2) Radioactive Decay of some ___________ in the Mantle and Core Generate a Lot of ______.

Answer 20

Elements…Heat…

Question 21

3) When Lower Parts of the Asthenosphere Heat Up, they Become Less ________ and Slowly ______.

Answer 21

Dense…Rise…

Question 22

4) As the ________ Parts of the Asthenosphere Move Towards the Top, they ______ Down, Become More _______ and Slowly Sink.

Answer 22

Lower…Cool…Dense…

Question 23

What are Convection Currents?

Answer 23

Circular Movements of Semi-Molten Rock.

Question 24

Convection Currents in the Asthenosphere Create _____ on the Base of the Tectonic ________, Causing them to Move.

Answer 24

Drag…Plates…