earthquakes and volcanoes 🌋

Question 1

7 major plates

Answer 1

North American
euro-asia
pacific
(nazca plate)
south American
arctic
african
indo Australian

Question 2

constructive plate margin

Answer 2

2 plates move away from each other

Question 3

constructive plate boundary

Answer 3

land forms
1. rift valley - great rift valley
2. volcanic mountains - mt Kenya

Question 4

destructive plate boundary

Answer 4

this is a convergent margin - 2 plates with different sizes meet

Question 5

subduction

Answer 5

oceanic crust is denser than the continental crust so it forces the oceanic crust underneath.

Question 6

trench

Answer 6

formed at the subduction zone where the plate is being forced downward.

Question 7

earthquakes

Answer 7

the friction is heavier as the plate subducts , the movement of tectonic plates.

Question 8

collision margins

Answer 8

convergent margins
2 continental plates meeting

Question 9

conservative plate margins

Answer 9

sliding
no destruction of the plate
move in opposite directions or the same but at different speeds

Question 10

focus

Answer 10

point in the centre of the earths crust where the earthquake originates.

Question 11

epicentre

Answer 11

the point at the earths surface , directly above where the eq originates

Question 12

shock waves

Answer 12

seismic waves caused by an earthquake that pass through the earths crust.