AnswersMO-Earth and Space Science ALab: Mineral and Rock Classification

Lab: Mineral and Rock Classification — Cumulative exam Answers

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21
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Which is the final event that occurs when a star is forming?

A
The outer layer of the star expands.
B
Gravity pulls gas and dust together.
C
A black hole forms as the core collapses.
D
Nuclear fusion begins under high pressure.
22
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Which statement accurately describes a half-life?

A
A rock’s size is determined by half-life.
B
All stable and unstable elements have a half-life.
C
An atom of an element becomes half its original size in a half-life.
D
A half-life is the time required for half of a radioactive element to decay.
23

Which type of metamorphic rock has randomly arranged grains and does not split into layers?

A
foliated
B
banded
C
massive
D
non-foliated
24

Where does compression often occur?

A
along a normal fault
B
along a strike-slip fault
C
at a divergent boundary
D
at a convergent boundary
25

Which are abiotic factors as well as basic needs that living things compete for?

A
bacteria and water
B
fungi and bacteria
C
pollen and sunlight
D
sunlight and water

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