AnswersMO-Earth and Space Science ALab: Relative and Absolute Dating

Lab: Relative and Absolute Dating — Unit test Answers

0 verified answers
1
Free Preview

Which important event in Earth’s history occurred during the Jurassic period?

A
The first birds emerged on Earth.
B
Mammals were in search of food.
C
Animals with shells emerged on Earth
D
Treelike ferns first began to grow and populate.
2
Free Preview

The image shows sedimentary rock layers.

Question illustration
A
1
B
2
C
3
D
4
3

The image shows locations of fossils from different geologic periods in Virginia.Which association correctly links the time period with the location of the fossils?

Question illustration
A
Pennsylvanian eastern and western Virginia
Option A
B
Cambrian throughout southern Virginia
Option B
C
Tertiary eastern Virginia
Option C
D
Quaternary eastern and western Virginia
Option D
4

Which period belongs to the Paleozoic era and not the Cenozoic era?

A
Devonian
B
Neogene
C
Paleogene
D
Quaternary
5

Which phrase describes faults?

A
cause gaps in the geologic record
B
cause rocks to break and move
C
are older than surrounding rocks
D
are igneous rocks that form beneath Earth’s surface
6

Which is an example of a trace fossil?

A
animal burrow
B
skin of organism
C
preserved bone
D
petrified wood
7

Which event is most likely if an index fossil is found in a layer at location 1, but the layer and index fossil are not found at location 2 nearby, which is known to be the same relative age?

A
The layer at location 2 is too old to contain fossils.
B
The locations were too close together.
C
The organism did not exist at location 2.
D
The layers at location 2 formed much earlier than those at location 1.
8

Which method preserves an image of a leaf?

A
The leaf turns into rock over time.
B
Tree sap flows over the leaf and preserves it.
C
Sediment covers the leaf and leaves an imprint on the rock.
D
As the leaf decomposes, carbon from the leaf is left on the rock.
9

Which statement accurately describes a half-life?

A
A rock’s size is determined by half-life.
B
All stable and unstable elements have a half-life.
C
An atom of an element becomes half its original size in a half-life.
D
A half-life is the time required for half of a radioactive element to decay.
10

Study the timeline.

Question illustration
A
5 million years
B
200 million years
C
1.5 billion years
D
4.5 billion years
11

The diagram illustrates radioactive decay.

Question illustration
A
Structure 1 is an unstable atom that turns into structure 2, a new atom.
B
Structure 1 is a stable element that breaks down into structure 2, an unstable element.
C
Structure 1 is a radioactive element that loses particles to create structure 2, released energy.
D
Structure 1 is a radioactive atom that decays into structure 2, half of the original unstable element.
12

Which characteristic of potassium makes it useful for dating rocks?

A
It has a long half-life.
B
It decays at an unknown rate.
C
It produces lead as it breaks down.
D
It can be used to date all types of rock.
13

Which statement describes potassium-argon dating?

A
Potassium-40 decays into argon gas over time.
B
Argon breaks down into other elements and compounds.
C
Potassium-40 becomes stable when trapped in rocks.
D
Argon is unstable and will decay into potassium-40 over time.
14

Which best explains how scientists confirmed that the moon formed around the same time as Earth?

A
Scientists determined the approximate age of fossils from the moon and Earth.
B
Scientists used radioactive dating to study the age of material from the moon and Earth.
C
Scientists explored the cycle of condensation and evaporation over time on the moon and Earth.
D
Scientists analyzed the content of gases that were part of the atmospheres on the moon and Earth.
15

What determines the length of a geologic time period?

A
fossil record
B
material density
C
meteors and rocks
D
radioactive materials

Did you find these answers helpful?

More from this Course

Quiz
15 verified answers

Unit Test

Quiz
15 verified answers

Unit Test

Quiz
15 verified answers

Unit Test

Lab: Relative and Absolute Dating — Unit test…