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Final Review: History Of Earth
Test Description: This will cover the ideas about Earth\'s formation and how we know about it.
Instructions: Answer all questions to get your test result.
1) How do scientists believe the earth was formed?
A
Scientists believe the earth was formed after the Big Bang, when debris was flying everywhere.
B
Scientists believe the earth grew from the sun.
C
Scientists believe the earth fell down from the sky.
D
Scientists believe the earth was formed before the Big Bang.
2) What does it mean that the earth “differentiated”?
A
Differentiated means that the earth was cut apart.
B
Differentiated means that Earth had different kinds of animals living on it.
C
Differentiated means that the earth formed its layers (of different densities).
D
Differentiated means that Earth had different kinds of plants living on it.
3) How do scientists believe the earth obtained its first oceans (water)?
A
Scientists believe the earth got its first water from the moon.
B
Scientists believe the earth got its first water from icy comets pelting the earth.
C
Scientists believe the earth got its first water from the sun.
D
Scientists don't believe the earth ever got water.
4) What do scientists believe led to the formation of the first continents (land)?
A
Scientists believe the first land came from the sun.
B
Scientists believe the first land came from the moon.
C
Scientists believe the first land came from icebergs.
D
Scientists believe the first land was created when volcanoes erupted under the ocean and built up.
5) What do scientists believe produced the first BREATHABLE amounts of oxygen?
A
Scientists believe the first oxygen came from water.
B
Scientists believe the first oxygen was always there.
C
Scientists believe the first oxygen came from the sun.
D
Scientists believe the first oxygen came from bacteria that lived all over the oceans.
6) How old do scientists believe the earth is?
A
4.54 billion years
B
4.54 million years
C
4.54 trillion years
D
4.54 years
7) To determine the age of the earth, scientists dated rocks from where?
A
From the earth, meteorites, and the moon
B
Only from the earth
C
Only from meteorites
D
Only from the moon
8) When scientists look at many layers of rock on top of each other, how do they figure out which are the oldest and youngest layers?
A
Oldest rock are on bottom, youngest rocks are on top.
B
Oldest rocks are on bottom, youngest rocks are on top AND layers that cut through others are younger
C
Oldest rocks are on bottom, youngest rocks are on top AND layers that cut through others are older.
D
Oldest rock are on top, youngest rocks are on bottom.
9) What kinds of things do scientists date using Radiometric dating with Carbon-14? Why?
A
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
B
Rocks and Fossils because Carbon is in everything
C
Only rocks because rocks were never living, so they don't lose Carbon 14 over time.
D
Rocks, because rocks are really old.
10) What kinds of things do scientists date using Radiometric dating with Uranium-238? Why?
A
Only fossils because fossils have too much Carbon
B
Rocks and Fossils because Uranium is in everything
C
Fossils, because fossils are really old.
D
Only Rocks because Uranium takes a long time to decay, so it can date really old rocks.
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