Disasters

Question 1

Which type of plates form destructive plate margins?

Answer 1

Oceanic and continental plates

Question 2

Which plate is more dense an oceanic plate or continental plate?

Answer 2

Oceanic plate

Question 3

How is a volcano formed by a destructive plate boundrary?

Answer 3

The oceanic plate subducts under the contential plate, and then the oceanic plate melts into magma which rises to make a volcano.

Question 4

Which type of plates form a constructive plate margin?

Answer 4

Two oceanic plates.

Question 5

How does a constructive plate margin form volcanoes.

Answer 5

The magma rises from beneath the surface as the two plates above it split apart.

Question 6

What does MMS stand for?

Answer 6

Moment Magnitude Scale.

Question 7

How do you measure earthquakes?

Answer 7

Moment magnitude scale

Question 8

Can collision plate boundries cause earthquakes AND volcanoes?

Answer 8

No

Question 9

What is the name of the point where the earthquake orignates?

Answer 9

The focus

Question 10

What is the name of the point directly above the point where the earthquake started?

Answer 10

Epicentre

Question 11

What are the waves released by an earthquake called?

Answer 11

Seismic waves

Question 12

What are the four plate margins?

Answer 12

Conservative, Constructive, Destructive, Collision

Question 13

What is ridge push?

Answer 13

When ridges formed by constructive plate boundaries push the two oceanic tectonic plates apart

Question 14

What is slab pull?

Answer 14

When the subducting plate in destructive plate margins pushes the rest of the tectonic plate downwards due to gravity

Question 15

What is the problem with the convection currents theory

Answer 15

The plates were moving faster than the convection currents they were floating on.

Question 16

How do destructive plate boundaries cause earthquakes?

Answer 16

The oceanic plate is subducted underneath the surface as it is more dense, the oceanic plate then proceeds to catch on the contential crust and it builds up pressure until the plate releases which causes an earthquake

Question 17

Which volcanoes have a dip in the middle?

Answer 17

Cinder cone volcanoes

Question 18

Which type of volcanoes are the tallest?

Answer 18

Composite volcanoes

Question 19

Which volcano is known as low profile?

Answer 19

Shield Volcano

Question 20

What are 3 hazards that volcanoes form?

Answer 20

(any three of) 
Pyroclastic flow 
Lahar 
Ash clouds
Volcanic bombs
Lava flow

Question 21

What is pyroclastic flow and what hazards does it cause?

Answer 21

Superheated, fast moving rocks. Can easily destroy houses or cars and kill people, if the rocks land on them.