Answers2001310 Earth Science Sem 1 - ReevesCycles of Matter

Cycles of Matter — Unit test Answers

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Which correctly lists the three isotopes that geologists measure to determine the age of an organism’s remains?

A
argon, nitrogen, and carbon-12
B
carbon-14, nitrogen, and carbon-12
C
nitrogen, potassium, and carbon-14
D
carbon-12, potassium, and argon
22
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Which is one piece of information that fossils in samples from Earth’s crust reveal about Earth’s history?

A
changes in climate
B
number of species at a specific time
C
composition of Earth’s core
D
age of organisms when they died
23

Which evidence suggests that several mass extinctions have occurred during Earth's history?

A
Fossils provide information about water level and temperature.
B
Many fossils demonstrate that organisms have changed over time.
C
Fossils of the same species have been found on distant continents.
D
Many fossils of organisms that are no longer living have been discovered.
24

Study the image about geologic time.

Question illustration
A
Quaternary
B
Neogene
C
Paleogene
D
Cenozoic
25

Which is a way that paleontologists have contributed to humans' understanding of the history of life?

A
They found evidence that climate has not changed significantly.
B
They grouped organisms by the period in which they existed.
C
They discovered that the first humans lived with dinosaurs.
D
They learned that life has existed since Earth was created.
26

Rosa drew a flow chart of the carbon cycle.

Question illustration
A
X: Producers undergo photosynthesis.Y: Decomposers return carbon to the soil and release waste.
B
X: Decomposers return carbon to the soil and release waste.Y: Producers undergo photosynthesis.
C
X: Decomposers take in carbon dioxide.Y: Producers absorb carbon through their roots.
D
X: Producers absorb carbon through their roots.Y: Decomposers take in carbon dioxide.
27

The diagram illustrates the water cycle.

Question illustration
A
precipitation
B
evaporation
C
condensation
D
transpiration
28

For which object would a geologist use carbon-14 dating to determine age?

A
The bones of animals
B
Rocks older than 50,000 years old
C
Types of Sedimentary rocks
D
Parts of Volcanic rock
29

Study the diagram of the geologic time scale.Which method is most likely used to identify what happened before the start of the Paleozoic era?

Question illustration
A
Scientists study fossils from the Jurassic period.
B
Scientists observe index fossil records of the Mesozoic era.
C
Scientists examine fossil evidence during the Precambrian time.
D
Scientists explore the emergence of mammals and humans in the Cenozoic era.
30

After two half-lives, how much of the original material has decayed?

A
25 percent
B
50 percent
C
75 percent
D
100 percent
31

Which best describes eras and periods?

A
Eras have a smaller time span than periods.
B
Eras and periods are independent of each other.
C
Eras and periods both appear at the start of the Cambrian period.
D
Eras were more recently established on the time scale than periods.
32

Which evidence suggests that several mass extinctions have occurred during Earth's history?

A
Fossils provide information about water level and temperature.
B
Many fossils demonstrate that organisms have changed over time.
C
Fossils of the same species have been found on distant continents.
D
Many fossils of organisms that are no longer living have been discovered.
33

How might an entire insect be preserved?

A
Soft and hard tissues turn the insect into rock.
B
Tree sap flows over the insect and hardens.
C
Sediment accumulates over the insect and hardens.
D
Carbon from the decaying insect leaves a print on a rock.
34

The image shows cross-cutting relationships. B, W, E, and K represent rock layers, and Q represents a fault.

Question illustration
A
Layer K is the oldest.
B
Layer W is the youngest.
C
Fault Q occurred before layer K was deposited.
D
Layers B, W, and E were deposited after fault Q occurred.
35

Which phrase describes the relative age of a rock?

A
uses the law of superposition to determine which rock is older or younger
B
can determine the age based on location of a rock within the same layer
C
requires only one rock to determine the age
D
can provide the exact age of a rock
36

Which correctly lists the three isotopes that geologists measure to determine the age of an organism’s remains?

A
argon, nitrogen, and carbon-12
B
carbon-14, nitrogen, and carbon-12
C
nitrogen, potassium, and carbon-14
D
carbon-12, potassium, and argon
37

Which best explains a primary reason for the inability of life to exist in Earth’s early atmosphere?

A
There was insufficient energy from material collisions to change their density.
B
High temperatures during Precambrian time caused surface water evaporation.
C
Volcanic eruptions and comet collisions added different gases to the atmosphere.
D
Available oxygen was used to help create an ozone layer within Earth’s atmosphere.
38

Which is the first step in the process during the formation of molded fossils?

A
Sediment hardens into rock.
B
Sediment is eroded from rock.
C
Organisms are buried under sediment.
D
Organisms' shapes are preserved in rock.
39

Which information can be determined using half-life?

A
age of material
B
type of particle released
C
percentage of rock that has aged
D
number of radioactive particles left
40

Which is one piece of information that fossils in samples from Earth’s crust reveal about Earth’s history?

A
changes in climate
B
number of species at a specific time
C
composition of Earth’s core
D
age of organisms when they died

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