Tectonic Hazards

Question 1

What are the two types of crusts?

Answer 1

Continental and Oceanic crust

Question 2

Which is the thicker crust

Answer 2

Continental crust (30-50km)

Question 3

Which is the thinner crust

Answer 3

Oceanic crust (7km)

Question 4

Which crust is less dense

Answer 4

Continental crust ⭐️

Question 5

Is oceanic more or less dense

Answer 5

More dense (fatty)

Question 6

What is the Continental crust made of

Answer 6

Granite

Question 7

Which crust is made of basalt

Answer 7

Oceanic 🌊

Question 8

What does the crust+rigid upper mantle make?

Answer 8

The lithosphere

Question 9

Which part of the mantle is rigid

Answer 9

The upper mantle

Question 10

The lower mantle is semi-

Answer 10

Semi-molten

Question 11

What is the lower mantle the zone of

Answer 11

Zone of convection currents

Question 12

What is made of MOLTEN iron and nickel

Answer 12

The outer core 🔥

Question 13

What is the inner core make of

Answer 13

SOLID iron and nickel 🪨

Question 14

Why is the inner core the densest layer of the Earth

Answer 14

Because of the immense pressure 💨

Question 15

What is the thinnest layer of the earth

Answer 15

The crust 🍕

Question 16

What is broken up into tectonic plates

Answer 16

The lithosphere

Question 17

How many plates are there

Answer 17

13

Question 18

What do the plates float on

Answer 18

The semi-molten lower mantle

Question 19

How can the plates move independently

Answer 19

Convection currents

Question 20

What are convection currents

Answer 20

Flows of the lower mantle 🩸

Question 21

Name the 4 plate margins

Answer 21

Constructive, Destructive, collision, conservative

Question 22

Which plate margin causes earthquakes and volcanoes 🌋

Answer 22

Constructive

Question 23

What happens at a constructive plate margin ⬅️

Answer 23

the two plates move apart ⬅️➡️ and magma rises to fill the gap and creates a new crust

Question 24

What happens at a conservative plate margin

Answer 24

Two plates slide past each other 🛝

Question 25

What does a conservative (transform) plate margin cause 🛝?

Answer 25

Earthquakes 🌍

Question 26

What happens at a destructive plate margin

Answer 26

Two plates move towards each other, ➡️💥⬅️the edge of one plate gets destroyed as it plunges beneath the other plate (subduction) ⬇️

Question 27

What do destructive plate margins cause

Answer 27

Earthquakes and volcanoes 🌋🌍

Question 28

What does a collision margin cause ➡️🗻⬅️

Answer 28

Earthquakes and volcanoes 🌋🌍

Question 29

What happens at a collision margin

Answer 29

Two plates move towards each other and are forced upward to create fold mountains ➡️🗻⬅️

Question 30

What is the focus of an earthquake

Answer 30

The point underground from where the plates slip and where the seismic waves radiate from

Question 31

What is the epicentre of an earthquake

Answer 31

The point on the Earth’s surface directly above the focus- strongest shaking💪 🫨

Question 32

What are seismic waves

Answer 32

Energy waves that cause the ground to shake

Question 33

What do primary waves do

Answer 33

Stretch and compress the ground

Question 34

What do seismic waves do

Answer 34

Shake the ground from side to side

Question 35

What is the Richter scale

Answer 35

It assesses the amount of energy released by the earthquake, and the intensity of shaking

Question 36

What is the magnitude of an earthquake

Answer 36

It measures the energy released at the source of the earthquake

Question 37

Magma chamber of a volcano

Answer 37

A reservoir of molten rock within the crust below a volcano. An eruption becomes more likely when it rises

Question 38

Primary hazard

Answer 38

Direct consequence of earthquake

Question 39

Secondary hazard

Answer 39

indirect consequence of earthquake