Geography Earthquakes

Question 1

What is an earthquake?

Answer 1

An earthquake is a sudden movement and shaking of the earth

Question 2

How does an earthquake occur?

Answer 2

By the movement of the plates of the crust e.g when plate collide or slide past each other.

Question 3

What happens when plates move?

Answer 3

The rock suddenly breaks and slips along a crack called a fault line

Question 4

What is a fault line?

Answer 4

A crack in the earth

Question 5

What’s a focus?

Answer 5

A focus is a point inside the earths crust where the earthquake starts

Question 6

What is a epicentre?

Answer 6

An epicentre is directly above the focus on the earths surface. Most damage is done here.

Question 7

What is a tremor?

Answer 7

A tremor is a shockwave coming out from the focus

Question 8

What is an aftershock?

Answer 8

An aftershock is mini earthquakes after the main earthquake.

Question 9

Where do earthquakes happen?

Answer 9

Pacific ring of fire, Himalayans and the mediterranean.

Question 10

What measures the strength of an earthquake?

Answer 10

The Richter Scale

Question 11

What is the definition of magmatude?

Answer 11

Magmatude means strength

Question 12

What does 0_4 mean on the Ritcher scale?

Answer 12

It means very little damage is done.

Question 13

What does 6.0 on the Ritcher scale mean?

Answer 13

It means major damage can be done

Question 14

What does 7.0 and above on the Ritcher scale mean?

Answer 14

Major damage done over large area.

Question 15

Where does the Ritcher scale go from

Answer 15

0_10

Question 16

What were the impacts of Japan 2011?

Answer 16

Loss of life e.g 18,000 people lost their lives due to the Japan 2011 tsunami/earthquake and 130,000 buildings were destroyed.

Question 17

Sample question- describe how an earthquake takes place

Answer 17

Most major earthquake happen at destructive plate boundaries. These two plates collide, and over decades pressure builds up at a point cs,led a fault line.When the pressure becomes to great,one plates slips releasing energy known as an earthquake. The point where the energy is realeased is called the focus. Energy radiates out in all directions, these waves are called shockwaves. Most damage is caused at the epicentre, which is the point on the rates surface directly above the focus, when an earthquake occurs under the ocean it can cause huge waves called a tusnami. E.g. Japan 2011 earthquake and tusnami