Structure Of The Earth

Question 1

What are the four main parts of the earths structure

Answer 1

The crust
The mantle
Outer core
Inner core

Question 2

Characteristics of the crust

Answer 2

• outer layer of the earth

* the thickness carts from between 0-60km

Question 3

Characteristics of the mantle

Answer 3

• widest section of the earth
• diameter of approximately 2900km
• made of magma
• it is harder towards the crust
• it is softer towards the outer core

Question 4

Characteristics of the Outer core

Answer 4

• a liquid layer
• made of iron and nickel
• temperatures similar to inner core

Question 5

Characteristics of the inner core

Answer 5

• hottest part of the earth
• made of iron and nickel
• it’s solid
• temperatures up to 5500degrees
• the heat energy acts like an engine room for the earth

Question 6

Types of crust

Answer 6

• oceanic

* continental

Question 7

Characteristics of oceanic crust

Answer 7

• it is denser(heavier)
• it’s newer (less than 200million year old)
• it can be subducted (sink)
• it can be renewed and destroyed
• mainly basaltic
• igneous rock

Question 8

Characteristics of continental crust

Answer 8

• it’s older(most over 1500 million years old)
• less dense
• it cannot be subducted
• it can’t be renewed or destroyed
• many granite
• igneous rock

Question 9

What does lithosphere mean?

Answer 9

It is the technical term for crust