The Earths Structure Flashcards
1
Q
The crust
A
- very thin
- surrounded by the atmosphere
2
Q
The mantle
A
- properties of a solid
- flow very slowly
- radioactive decay takes place ⇒ produces heat which causes the mantle to flow in convection currents.
3
Q
The core
A
We think is made of iron and nickel.
4
Q
The Earths surface is made up of…
A
tectonic plates.
convection currents cause them to drift.
most moves at the speed of a few cm a year.
occasionally, the plates move suddenly causing an earthquake.
volcanoes and earthquakes often occur at the boundary of two plates.
