History

Question 1

What was the schlieffen plan?

Answer 1

The schlieffen plan was the idea to flank the french army through belgium, knocking France out of the war

Question 2

What are convection currents?

Answer 2

Convection currents are in the mantle and move the plate.

Question 3

What gives convection currents heat?

Answer 3

Radiactive decay in the earths core heats up the mantle

Question 5

What is the epicentre

Answer 5

The point directly above the focus of the earthquake

Question 6

What is the focus

Answer 6

The point on the earths surface directly below the epicentre, and the point where the earthquake strikes

Question 7

What is a fault line

Answer 7

A line on the earths surface that traces a geological fault

Question 8

What are primary waves

Answer 8

Arrive first and fast, pushes and pulls, moves at 8km per second

Question 9

Secondary waves

Answer 9

Slower, up and down motion, move an about 4km per second

Question 10

What are surface / low waves:

Answer 10

Arrive 20-30 seonds after primary and secondary waves, rolling motion, side to side. Causing most damage due to rolling motion

Question 11

What are Surface waves / rayleigh waves

Answer 11

Only travel through the surface of the crust, fastest waves and move up and down

Question 12

Why was the earthquake in haiti so destructive

Answer 12

1. The earthquake had a magnitude of 7.0
2. The depth was only about 8-10km deep
3. The location was only 15km away from southwest of the capital city
4. Happened at the most active time, when people were moving and getting to work

Question 13

What is high silica lava

Answer 13

1.gas bubbles dont escape
2. Very viscous magma
3. Very explosive / violent erriptions