Unit 1 - AOS2 - Form of Spheres

Question 1

How was the atmosphere formed ?

Answer 1

When the earth formed , it’s gravitational pull captured some gas

Question 2

How was liquid water formed?

Answer 2

As the temp on earth decreased over millions of years water vapour in the atmosphere was able to cool to come liquid water

Oceans were formed.

Question 3

What did volcanic eruptions bring into the evolved atmosphere?

Answer 3

• water vapour
• carbon dioxide
• nitrogen
• methane

Question 4

What caused the early atmosphere to be almost all lost ?

Answer 4

Vigorous solar winds from the sun

Question 5

What caused rock weathering to occur and what is the impact of rock weathering?

Answer 5

• water cycle promoted rock cycling

Impacts
- rock weathering is a key part of the cycles that regulate the earths climate.
- Rock weathering also caused sediments to be eroded creating new layers of the lithosphere. (scientist can determine the age and material when looking at the layers)

Question 6

What did comets bring to the earth?

Answer 6

Water and organic materials.

Question 7

what supports continental drift

Answer 7

• identical rocks (same type and age) found on both sides of the Atlantic Ocean
• Ancient fossils of extinct animals (cannot fly/swim) found on widely separated continents.

Question 8

Layers of the earth, there thickness, major materials and consistency.

Answer 8

Crust
- 10-70km
- rock (granite)
- Hard

Mantle
- 2900km
- Silicate materials
- Viskase (mud)

Outer core
- 2,200km
- iron and nickel
- liquid

inner core
- 1,300km
- iron
- solid