Inner Earth Flashcards

1
Q

What was the super continent millions of years ago called

A

Pangea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name the structure of the earth

A

Crust,mantle,outer core,inner core

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the plates that carry land on them and that don’t

A

Continental plates =land in them. Oceanic plates = carry sea on them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How do plates move

A

Magma in the earths mantle moves in big circles called convection currents moving the plates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What happens when plates collide

A

At some palate boundaries the crust is destroyed(destructive plate boundary)
If two continental plates collide the crust crumples upwards (fold mountains)
If an oceanic and continental plate collide the oceanic plate gets dragged down into the mantle (subduction)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the impacts of plate collision

A

.earthquakes
.fold mountains
.destruction of plate
.volcanoes
.Subduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What happens when plates separate (constructive plate boundary)

A

Magma comes to the surface to fill the gap it hardens into basalt rock(new crust is formed)
This usually happens on ocean floors making undersea volcanoes e.g the mid Atlantic ridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Impacts of plate separation

A

Volcanoes
New crust
Earthquakes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What happens when plates slide past eachother

A

They should slide smoothly causing small, harmless earthquakes. Sometimes the plates get stuck and build of great pressure until they slip releasing this pressure. This causes a destructive earthquake example 1994 Northridge quake

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the impacts of plates sliding past each other

A

Earthquakes
Tsunamis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is a volcano

A

A volcano is formed by the eruption of magma on the earths surface through a vent in the earths crust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is silica and what does it do ?

A

How explosive a volcano is depends on silica the mineral that traps gas within it making the magma sticky and thick like honey which makes a cone shaped mountain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What happens if the eruption is too strong

A

It can blow the mountain to pieces turning it into a superheated mix of rock dust ash and gas called pyroclasts which moves down a volcano (pyroclastic flow)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is the location of volcanoes

A

. Where plates collide separate and hot spots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

name the life cycle of a volcano

A

Active =continuously erupting
Dormant =the volcano hasn’t erupted in a long time
Extinct =the volcano won’t erupt ever again

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the name of a person who studies volcanoes?

A

A volcanologist