science exam pt.2 11/5/18

Question 1

what makes some sediments rounded and some sediments angular

Answer 1

as sediments are transported, the particles collide with each other and other objects in their path. This causes the particles to change size and shape. Also, when particles first break from the source rock, they tend to be angular and uneven. Particles that have traveled for long distances tend to be more rounded and smooth.

Question 2

how do contour lines indicate the flow or a steam or river

Answer 2

rivers always flow in the opposite direction from the way the contour lines bend

Question 3

how does diamond formation differ from graphite formation

Answer 3

graphite forms closer to the surface and has fewer bonds than diamond

Question 4

what causes a vesicular texture in some rocks

Answer 4

when magma contains a large amount of dissolved gasses and cools quickly

Question 5

how does mineral composition affect rock color?

Answer 5

darker minerals form darker rocks, lighter minerals form lighter rocks
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