plate boundaries

Question 1

crust

Answer 1

thin solid outer layer
made up of oceanic and continental crust
all human activity take place

Question 2

mantle

Answer 2

very thick layer
mostly dense or solid
upper part layer which is semi liquid called molten rock
movement of molten causes plate tectonics

Question 3

core

Answer 3

divided into liquid outer core and solid inner core
temperature and pressure extremely hot and strong which causes rock of inner core to be solid

Question 4

what is a transform/neutral/conservative plate boundary

Answer 4

two plates sliding against each other either in opposite directions or in the same direction but at the different speeds
sudden and rough jolting movement

Question 5

give an example of a transform or neutral plate boundary

Answer 5

haiti earthquake 2010 and 2021 occurring at transform plate boundary between caribbean and north american plate boundary

Question 6

what is a divergent/constructive plate boundary

Answer 6

2 plates moving away from each other and molten rock/magma rises inbetween two crustal plates leading to formation of new crust
if 2 oceanic plates move apart it is the sea floor spreading

Question 7

give an example of divergent/constructive plate boundary

Answer 7

mid atlantic ridge where north america diverges away from eurasion plate to form underwater mountain ridge in atlantic ocean

Question 8

what is formed at a divergent/constructive plate boundary

Answer 8

underwater volcanoes
volcanic islands like in iceland

Question 9

what is a destructive/convergent plate boundary

Answer 9

2 plates move towards each other
oceanic colliding with continental
denser or heavier plate subducted beneath less dense plate to form subduction plate

Question 10

how are earthquakes formed in a destructive/convergent plate boundary

Answer 10

movement is not smooth and sometimes plate sticks where energy and pressure builds up within rocks
when this is released seismic waves transfer energy through rocks

Question 11

how are volcanoes formed in a destructive plate boundary

Answer 11

as oceanic/crustien plate subducted underrgoes intense heat and pressure as pulled down into mantle
causes rock to melt and turn into magma which may escape to surface of land through cracks

Question 12

how are fold mountains formed in destructive/convergent plate boundary

Answer 12

when two continental plates converge, no subduction zone
have similar density so instead rocks crumple together at collision zone

Question 13

give an example of fold mountains

Answer 13

himalayan mountains in north india from the indo-australian plate and eurasion plate