plate tectonics

Question 1

constructive

Answer 1

plates move apart
magma rises and forms new crust
gentle eruptions, shield volcanoes
shallow earthquakes

Question 2

destructive

Answer 2

oceanic plate subducts under continental plate
volcanoes and powerful earthquakes
fold mountains form

Question 3

conservative

Answer 3

plates slide past each other
friction builds = sudden earthquakes
no volcanoes

Question 4

why do plates move

Answer 4

convection currents in the mantle

Question 5

what is the focus

Answer 5

the point inside earth where quake starts

Question 6

whats epicentre

Answer 6

point on surface directl above focus

Question 7

how to monitor earthquakes

Answer 7

seismometers
Gps movement measurement
satellite monitering
hazard mapping