E.2 Earthquakes and volcanos Flashcards
1
Q
What is magma?
A
MOlten(liquid) rock from the mantle (called magma when inside the mantle)
1
Q
What is a volcano?
A
An opening in the earths crust from which molten (liquid rock) ash, and gasses ascape
2
Q
What is an earthquake?
A
Cause by the sudden movement of rock in the earths crust, releasing seismic waves
3
Q
What is the focus
A
The place under the crust where the rock or crust breaks first
4
Q
What is the epicentre?
A
The place right about the focus on the earths focus
5
Q
Why does magma flow up out of volcanos?
A
Solid rock expands when it melts. Ad it expands the moltwn rock moves upwards
6
Q
How do convection currents relate to the mantle
A
Hotter molton rock rises ti the surface and cooler molten rock sinkc creatong convection currents
