Tectonic activity

Question 1

Volcanoes

Answer 1

Formed at constructive plate boundaries, destructive plate boundaries and hot spots. A point at which magma rises to the surface of the earth due to convection currents.

Question 2

Tsunamis

Answer 2

When a plate slips above another under a water body water is displaced releasing huge waves.

Question 3

Continental Drift

Answer 3

The movement of plates due to convection currents. Discovered by Alfred Wegener in 1912

Question 4

Convection Currents

Answer 4

Hot magma rising through the mantle from the outer core due to the heat. They push against the plates and move them through friction.

Question 5

Inner core

Answer 5

Solid core that reaches 50000 degrees C

Question 6

Outer core

Answer 6

Liquid core

Question 7

Mantle

Answer 7

Hot molten rock (magma) takes up roughly 1/3 of the earth

Question 8

Crust

Answer 8

Thin, solid layer made of oceanic (thinner+ denser) and continental ( thicker + less dense)

Question 9

Earthquake

Answer 9

Seismic waves released when two plate boundaries move in different speeds or at different directions creating friction. Pressure builds up and eventually releases seismic waves.

Question 10

Conservative plate boundary

Answer 10

Where two plates move alongside each other at different speeds or different speeds. Pressure builds up due to friction and when it is released it can cause the worst earthquakes. e.g. San Andreas Fault- NA(c) and Pacific (o)

Question 11

Destructive plate boundary

Answer 11

Where one oceanic and one conservative plate meet. Oceanic subducts as it is denser slowly grinding for a while causing earthquake. Volcanoes form at the rift. Peru- Chile trench- Nazca(o) SA(c)

Question 12

Constructive plate boundary

Answer 12

Where two plates move apart giving way for lava to rise up. North Atlantic Ridge- Eurasian(c) + NA(c)

Question 13

Collision plate boundary

Answer 13

Where two plates of equal density meet causing fold mountains. HImalayas- Indian+ Eurasian

Question 14

Richter scale

Answer 14

Logarithmic scale which measures seismic activity with seismometers.

Question 15

Mercalli scale

Answer 15

Scale of 1-12 of destruction