Earth + Natural Disasters

Question 1

What is a volcano?

Answer 1

An opening in the earths crust where magma, ash and gas escape.

Question 2

What is an earthquake

Answer 2

A shaking of the earths crust due to sudden release of energy due to rocks being under stress and then slipping past eachother.

Question 3

Structure of the earth

Answer 3

ignore 🥰🥰🫣

Question 4

Describe the crust

Answer 4

-very thin
-split into the oceanic crust (thinner -5km- and more dense)
-continental crust (thicker -50km- but less dense

Question 5

Describe the mantle

Answer 5

-2900km thick (84% of the earths volume)
-solid but hot

Question 6

Describe the outer core

Answer 6

-2300km thick, made of iron and nickel
-is liquid

Question 7

Describe the inner core

Answer 7

-has a radious of 1220lm
-solid metal
-hotter than the suns surface

Question 8

The crust is broken into sections called..

Answer 8

Tectonic plates

Question 9

What is a plate boundary

Answer 9

Where two plates meet

Question 10

Describe the process of convection currents in order

Answer 10

1- the warm core heats the magma at the bottom of the mantle

2- the heated magma is less dense and rises upward

3- the magma cools and sinks back down

4- the magma is forced to move sideward dragging the plate with it

5- the process repeats

Question 11

Explain construction boundaries

Answer 11

Two played move away from eachother and magma can move up from the mantle, this causes frequent undersea volcanic activity

Question 12

Describe the process of a destructive plate margin

Answer 12

-the oceanic plate is sub ducted because it is denser and it is melted
-the new magma produced in the mantle is less dense than its surroundings
-the new magma moves up and erupts through the crust.