Earths Structure & Geologic History

Question 0

Name the four major layer of the earth from the centre to it’s surface

Answer 0

Inner core
Outer core
Mantle
Crust

Question 1

How old is the earth?

Answer 1

4.6 billion years old

Question 2

Describe the physical attributes of the 4 layers of the earth

Answer 2

Crust- mid ocean ridges , subduction zone , rlly thin
Mantle- magmas
Outer core- molten
Outer core- solid (metals)

Question 3

Name the four divisions of time and there inhabitants of geologic history

Answer 3

Precambrian- no life
Palaeozoic-age of amphibians
Mesozoic- age of reptiles
Cenozoic- age of mammals

Question 4

Which German scientist devised the theory of continental drift? What did he call the giants super continent?

Answer 4

• Alfred Wegener

- Pangea

Question 5

What were his four pieces of evidence

Answer 5

1) jigsaw fit
2) he found fossils of simalar plants and animals on the different continents
3) structure is the same on both side of the ocean
4) ice sheets covered parts of places that are hot now