Geologic Time Answers
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What was the significance of collisions of dust, rock, and ice during Earth’s formation?
A
to modify the density of materials present on EarthB
to facilitate heat absorption from the surrounding spaceC
to blow away a strong burst of particles from the first atmosphereD
to harden materials to form different parts of Earth’s layers2
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Which best explains how the collisions of materials in space contribute to the formation of layers in protoplanets?
A
The materials undergo decay when they collide, which results in the heating and subsequent melting and rising of materials.B
The collisions release heat, which results in the heating and subsequent melting, sinking, and rising of materials.C
The materials undergo decay when they collide, which results in the cooling and subsequent hardening and sinking of materials.D
The collisions absorb heat, which results in the cooling and subsequent hardening and rising of materials.3
Which period is older than the Triassic period?
A
CambrianB
CretaceousC
JurassicD
Paleogene4
Study this image of a geologic time scale.
A
1.6 million years agoB
132 million years agoC
410 million years agoD
520 million years agoDid you find these answers helpful?
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