Tectonic Hazards

Question 1

What is the thinnest and lowest density layer of the Earth?

Answer 1

The crust

Question 2

What do the crust and mantle make up

Answer 2

The lithosphere

Question 3

How thick is the mantle

Answer 3

2900 km

Question 4

True or false, the upper mantle is semi-molten and is the zone of convection currents.

Answer 4

False

Question 5

How thick is the outer core?

Answer 5

2200 km

Question 6

what is the outer core made of (list two)

Answer 6

molten iron, molten nickel

Question 7

How thick is the inner core?

Answer 7

1260 km

Question 8

True or false, the inner core , made of iron and nickel, are solid

Answer 8

True

Question 9

Which has a lower density crust, continental crust or oceanic crust

Answer 9

Continental crust has a lower density than oceanic crust

Question 10

What is continental crust made out of? (List one)

Answer 10

Grannite

Question 11

What is oceanic crust made out of (name one)

Answer 11

Basalt

Question 12

How thick is continental crust?

Answer 12

30 km – 60 km

Question 13

How thick is oceanic crust?

Answer 13

7 km

Question 14

which plate margin has two plates diverging above the plume of a convection cell when magma rises up through the gap between the two plates resulting in volcanoes. the erupted lava cools and solidifies to form new crust

Answer 14

This describes a constructive plate margin

Question 15

what margin is this? when two plates, one made of continental crust and one made of oceanic crust are converging. When the two plates meet, the oceanic plate of dives beneath the continental plate as its denser. This is known as subduction. The continental crust can buckle upwards creating a range of fold mountains.

The sinking plate can get “stuck“ because of friction, leading to a buildup of pressure.This is released in the sudden slip of the plate resulting in earthquakes. This also generates heat causing the crust to melt. This creates magma which rises up through the cracks in the rock resulting in volcanic eruptions.

Answer 15

this describes a destructive plate margin

Question 16

What type of plate margin is this? This margin occurs when two plates made of continental crust convert. As neither plate is denser than the other, subduction does not occur. Therefore, the plate simply buckle up to create a range of fold mountains.

Answer 16

this is describing a collision plate margin.

Question 17

what plate margin is this? This plate margin occurs when two plates move alongside one another in opposite directions or in the same direction. Friction can cause two plates to stick, and pressure builds up. When the plates slip, this pressure is released as a powerful earthquake. 

Answer 17

this is a conservative plate margin

Question 18

what type of plate margin of the most volcanoes found on

Answer 18

Destructive plate margins

Question 19

True or false, earthquakes and volcanoes are evenly distributed on the earths surface

Answer 19

False

Question 20

True or false, volcanoes are clustered in linear belts which correspond to the positions of plate margins.

Answer 20

True