Earth&Atmosphere

Question 1

What is wegener’s theory of continental drift?

Answer 1

Continents fit like a jigsaw and matching fossil and rocks suggest the continents are constantly shifting

Question 2

What is contained in Earth’s Atmosphere?

Answer 2

The atmosphere is made of nitrogen (79%) oxygen (20%) argon (1%) and other gases

Question 3

How has Earths atmosphere changed over time?

Answer 3

1. Early atmosphere lots of methane and carbon dioxide
2. Water condensed to form oceans and much less carbon dioxide
3. Trees release oxygen and carbon dioxide levels reduced

Question 4

What is the structure of the earth like?

Answer 4

Earth has an inner core, outer core, mantle and crust

Tectonics played are constantly shifting around, can move quickly such as during an earthquake

Question 5

What impact do humans have on the Earth?

Answer 5

Humans burn fossil fuels making carbon dioxide

Plastics are difficult to dispose of properly

Question 6

What is the Miler and Urey experiment of 1952?

Answer 6

Recreate life replicating the early conditions on Earth

Carbon compounds had formed which make proteins suggesting this is how life began

Question 7

What was there very little of in the early atmosphere ?

Answer 7

Oxygen

Question 8

What can happen if the tectonic plates move?

Answer 8

Earthquakes and volcanoes