ma1 g9 geography

Question 1

when did rock first form

Answer 1

4.5 billion years ago

Question 2

what are minerals?

Answer 2

minerals are natural compounds found in rock. usually in crystals.

Question 3

building industry uses..
LIMESTONE/SAND ->

Answer 3

limestone/sand into concrete

Question 4

building industry uses..
LIMESTONE ->

Answer 4

limestone into CEMENT

Question 5

building industry uses..
AGGREGATE (crushed rocks) ->

Answer 5

aggegate into roads

Question 6

define silt

Answer 6

fine material deposited as sediment