The earth Flashcards
1
Q
Most abundant gas
A
Nitrogen
2
Q
Four spheres
A
lithosphere hydrosphere biosphere atmosphere
3
Q
Lithosphere is made up of
A
tectonic plates
4
Q
Three parts
A
Core mantle crust
5
Q
Commonest crystalline form of silicon dioxide
A
quartz
6
Q
95% of rocks in earth crust made of
A
silicates
7
Q
minerals natural / non?
A
natural
8
Q
Are minerals elements or compounds?
A
both
9
Q
Minerals valuable because
A
Rare
10
Q
Shape of earth
A
sphere
11
Q
Two types of plate
A
oceanic continental
12
Q
Which plate is more dense
A
oceanic
13
Q
Types of current in the mantle
A
Convection currents
14
Q
Oeanic meets con what happens
A
oceanic slides under
15
Q
Process of oceanic sliding under
A
Subduction
