Section #: 22.1
The Early Earth
Practice Test
1.
The oldest rocks on Earth are __________.
SC.D.1.4.3
a.
1.6 to 1.8 million years old
b.
3.96 to 3.8 billion years old
c.
3.5 billion years old
d.
1 to 2 billion years old
Hint
2.
What evidence supports the hypothesis that Earth is 4.6 billion years?
SC.D.1.4.3
a.
the age of zircon grains in granitic crustal rocks
b.
the age of rocks from the Moon
c.
3.5 billion years old
d.
all of the above answers are correct
3.
How were asteroids and meteorites a heat source for Precambrian Earth?
SC.D.1.4.1
a.
Their bombardment of Earth caused them to sink to the core.
b.
Their impact on Earth generated energy.
c.
Their radioactive decay of isotopes generated energy.
d.
Their gravitational contraction generated energy.
Hint
