Earthquakes and volcanic eruptions

Question 1

Three things that make the core hot

Answer 1

• Pressure (not enough space to become a gas of the molecules become angry)
  -BIGBANG (collisions/lots of things hitting the Earth generated heat)
  -Radioactiveness

Question 2

What’s the continental drift?

Answer 2

Movement of continents

Question 3

Describe the core

Answer 3

-It’s made from lead, iron and nickel, which are heavy base metals
-The core is very dense
-It’s so hot because of the huge amount of pressure there

Question 4

What’s the mantle made of?

Answer 4

Molten rocks

Question 5

What’s a convection current?

Answer 5

1. The core heats the lower mantle
   2 The top of the mantle as cold as it is further away from the core
2. The hot rocks expand because of the heat, which makes it less dense
3. The cold rocks are more dense so fall to the bottom as the hot rocks rise
   5 The cold rocks then heat up at the heat source and the cycle repeats

Question 6

Describe the crust

Answer 6

The mantle affects the crust as it is fractured into tectonic plates and creates plate boundaries that can move a part of collide

Question 7

Characteristics of a continental crust

Answer 7

-Older
- Less dense
-Cannot sink

Question 8

Characteristics of an oceanic crust

Answer 8

• Newer
  -More dense
• Can sink

Question 9

What are the two different types of crust?

Answer 9

Continental and oceanic

Question 10

What are the different types of plate boundaries?

Answer 10

Conservative, constructive, destructive, collision zones

Question 11

How does a Conservative boundary work?

Answer 11

Two plates move past each other in the same direction, but one moves slower than the other so they scrape against each other

Question 12

Give an example of a Conservative plate boundary

Answer 12

San Andreas fault

Question 13

How does a constructive plate boundary work?

Answer 13

Convection currents pull Two plates, apart, the sea, then fills the gap and underwater volcanoes can form 

Question 14

Give an example of a constructive plate boundary

Answer 14

Mid-Atlantic ridge

Question 15

How does a destructive plate boundary work?

Answer 15

A continental plate and an oceanic plate, push against each other, and the oceanic plate is subducted underneath the continental plate

Question 16

How does a collision zone form?

Answer 16

Two continental plates push against each other forming fold mountains

Question 17

What is an example of a collision zone?

Answer 17

Alps

Question 18

What is an example of a destructive plate boundary?

Answer 18

The Chilie trench

Question 19

What forms at a constructive plate boundary?

Answer 19

Volcanoes and earthquakes

Question 20

What forms are destructive plate boundary?

Answer 20

Fold mountains, trenches, volcanoes, and earthquakes

Question 21

What forms at a Conservative plate boundary?

Answer 21

Earthquakes

Question 22

What forms at a collision zone?

Answer 22

Fold mountains, volcanoes and earthquakes

Question 23

Explain why ocean trenches are often found a fold mountains, (4 marks)

Answer 23

Ocean trenches often found near fold mountains because ocean trenches are formed on destructive plate boundaries. They are formed when the oceanic plate is subducted under a continental plate and a V shape dip is formed under the ocean. Fold mountains are also formed at destructive plate boundaries when the continental plate is compressed, which forms fold mountains. However fold mountains also formed on collision zones, which means they’re not always next to oceanic trenches.