Layers of the Earth 1.1 Flashcards
The Earth is made of three parts. Name them…
Earth’s crust, Earth’s mantle, and Earth’s core (Inner & Outer).
How thin is the Earth’s crust?
between 7 to 40 kilometers
The movement of the Earth’s crust plates is called
Plate tectonics
Which two types of Earth’s crust are there?
Pieces of ocean floor & pieces of continent
Why does the rock in the mantle melt?
Because of high temperatures in the core.
Volcanism & earthquakes are a result of what?
When plates collide and diverge.
Pieces of crust are called what?
Plates
270 million years ago all continents were part of a one big continent called?
Pangaea
Pangaea is considered a what?
A supercontinent.
What was the rest of the earth covered in outside of Pangaea?
Ocean
Why was there so much desert climate on Pangaea?
Because it was so big and much wind was able to blow drying everything out.
Pangaea was located in what part of the world?
What is now called Africa
What made the supercontinent break apart?
A hot rock flow that came up from the bottom of the Earth’s crust side-ways. The pressure made the supercontinent swell up, tear and fall apart into smaller continents.
With the breaking apart of Pangaea, the number of plants and animals increased or decreased.
The influence of the sea increased and resulted so did the variety of plants and animals.
Plate tectonics broke up Pangaea but what else did they create?
Mountain ranges, like the Alps.
