Yr6 - S3 - Earths Surface

Question 1

Picture a Strike-slip vault.

Answer 1

Question 2

Picture a Thrust Fault.

Answer 2

Question 3

Picture a normal Fault.

Answer 3

Question 4

What is a fault line?

Answer 4

Its the line where two tectonic plates meet.

Question 5

What causes the vibrations felt during an eartyhquake?

Answer 5

They are caused by large rocks cracking under stress and sesmic waves that are created

Question 6

What is a epicenter?

Answer 6

Its the location where seimic waves reach the surface of the tectonic plates.

Question 7

How are tsunamies caused?

Answer 7

When one tectomic plate shifts below another tectonic plate under water, the water is displaced. Therefore an enormouse amount of water is pushed by the earthquakes energy.

Question 8

Whitch scale is used to measure the power of an earthquake?

Answer 8

The Modified Murcullie, a scale for measuring the power of earthquakes from 1 to 10 it was developed by Charles Richer in 1935. This scale is still used, although it was modified in 1977.

Question 9

Describe the the theory of plate tectomics.

Answer 9

That the Earths outer shell is devided into several plates that glide over the mantel.

Question 10

What theory pruposed by Alfred Wegener, did plate tectonics build from?

Answer 10

Alfred Weneger pruposed the continental drift theory in 1912.

Question 11

Which theory was developed first continental drift theory or plate tectonics?

Answer 11

Continental drift theory was developed in 1912 the plate tectonic theory was developed in 1950 to 1970.

Question 12

How many major plates are there? And what are they called.

Answer 12

there are 9 they are

1. North America
2. Pacific
3. Eurasian
4. African
5. Indo/Australian
6. Australian
7. Indian
8. South american
9. Antartic

Question 13

why do tectonic plates move?

Answer 13

The earths mantle moves the plates along with something called convection. Convection is the cycling of a liquid when heated up. When the lower mantle magma gets heated up by the inner and outer core that magma flotes to the top and the magma at the top goes to the bottom. With this continuing cycle it pushes along the continents.

Question 14

What is a mid ocean ridge?

Answer 14

Its the gap between tectonic plates that mantle the Earth.

Question 15

How do fossle records prove or support Wegeners idea?

Answer 15

Fossle records from both sides of the atlantic showed simmilar plantes, indicating that the land was once joined.

Question 16

Whats the name of the most recent super continent?

Answer 16

The most recent super continent was Pangaea.

Question 17

what is the alternative terms learned for

Mantle and crust

Answer 17

Mantle: Astenosphere

Crust: Lithosphere

Question 18

What are the thee types of plate boundaries?Describe.

Answer 18

1. Divergant
2. Convergant
3. Transform

Question 19

Describe a divergant boundary

Answer 19

When plates move away from each other, magma comes up from the mantle, when it reaches the crust, it cooles and formes new igneous rock.

Question 20

Describe a convergant boundary.

Answer 20

Plates move towards each other. When an oceanic plate meets a continental or another oceanic plate subduction occures. this means the heavier plate slides under the other plate. Volcanoes and ocean trenches often occur here.

Question 21

Describe a transformation boundary.

Answer 21

Two tectonic plates that rub together to create earthquakes.

Question 22

What gas is released from volcanoes?

Answer 22

Sulfur dioxide

Question 23

What is the difference between the lithosphere and the athosphere?

Answer 23

The lithosphere is the mantle and outer core while the asothenspere is the inner core.

Question 24

Describe the theory of continental drift?

Answer 24

The tectonic plates are moved with something called convecion. This is when the magma from the inner core gets heated up and floats to the top to cool down. whilw the magma at the top goes to the bottom.

Question 25

What is the difference between the epicenter and the focus of an earthquake?

Answer 25

The focus of an earthquake is underground where the tectonic plates meetwhile the epicenter is above the focus of an earthquake.