Fossils

Question 1

Ethan determines that layer B is 3.5 million years old. Due to the , he can estimate that layer A is years old.

Revolt · Accepted Answer

B: law of superposition

Question 2

The principle of cross-cutting relationships states that certain features, such as faults, are than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. formations are made of molten rock that has cooled. Those on Earth’s surface are called . Those beneath Earth’s surface are called .

Revolt · Accepted Answer

A: younger

Question 3

Which statements describe geologic gaps? Check all that apply.Geologic gaps happen when volcanoes erupt.When no sediment is deposited for a long time, angularities can result.An unconformity happens when rocks do not follow normal geologic rules.A geologic gap happens when rock is eroded before sediment is deposited.An unconformity occurs when a rock layer’s relative age can be determined.

Revolt · Accepted Answer

C: An unconformity happens when rocks do not follow normal geologic rules.; D: A geologic gap happens when rock is eroded before sediment is deposited.

Question 4

Index fossils are the remains of organisms that lived on Earth for periods.

Revolt · Accepted Answer

C: short

Question 5

Ethan determines that layer B is 3.5 million years old. Due to the , he can estimate that layer A is years old.

Revolt · Accepted Answer

C: 4 million

Question 6

The principle of cross-cutting relationships states that certain features, such as faults, are than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. formations are made of molten rock that has cooled. Those on Earth’s surface are called . Those beneath Earth’s surface are called .

Revolt · Accepted Answer

C: Igneous

Question 7

First, geologists use relative age to determine the of the layers of rock.

Revolt · Accepted Answer

C: order

Question 8

The principle of cross-cutting relationships states that certain features, such as faults, are than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. formations are made of molten rock that has cooled. Those on Earth’s surface are called . Those beneath Earth’s surface are called .

Revolt · Accepted Answer

B: extrusions

Question 9

They then use index fossils to relate the layers to those in locations.

Revolt · Accepted Answer

A: different

Question 10

The principle of cross-cutting relationships states that certain features, such as faults, are than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. formations are made of molten rock that has cooled. Those on Earth’s surface are called . Those beneath Earth’s surface are called .

Revolt · Accepted Answer

A: intrusions

Fossils Answers

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