01
Choose one
1 point
Rain erodes rock and carries sediment into a river. Which statement best explains how this process illustrates Earth as a system?
Free Practice Quiz Question List
1 Earth’s Formation and Internal Structure Online Quiz Questions
Use this free practice quiz with 20 questions to review 1 Earth’s Formation and Internal Structure, test your knowledge, and prepare for your next test or exam.
20 questions
02
True or false
1 point
True or false: Mantle rock is mostly solid, yet it can deform and flow very slowly over geologic time.
- A
True
- B
False
03
Fill in the blank
1 point
Compared with continental crust, is generally thinner.
04
Choose one
1 point
As early Earth differentiated, which process best explains how its metallic core and rocky outer layers formed?
- A
Lighter rocky material sank to the center, and dense iron-rich material rose toward the surface.
- B
The crust melted completely and became the only layer to form.
- C
Dense iron-rich material sank toward the center while lighter rocky material rose.
- D
The early planet separated into layers only after its oceans formed.
05
Written response
1 point
What method do scientists use to estimate Earth’s age by measuring the decay of radioactive isotopes in rocks and minerals?
06
Choose all
1 point
Select all the observations that provide evidence about Earth’s internal structure.
- A
Seismic waves change speed or path as they pass through different materials.
- B
Daily surface weather patterns directly map the boundaries between internal layers.
- C
Measurements of gravity and Earth’s rotation reveal how mass is distributed inside the planet.
- D
The magnetic field provides evidence about moving electrically conducting material in the outer core.
07
True or false
1 point
True or false: The inner core remains solid because the immense pressure at Earth’s center prevents it from melting, despite its extreme heat.
- A
True
- B
False
08
Fill in the blank
1 point
The rigid outer shell made of the crust and uppermost mantle is the .
09
Written response
1 point
Approximately how old is Earth? Enter the value in billion years.
10
Choose one
1 point
S waves from earthquakes do not pass through the outer core. What conclusion does this observation support?
- A
S waves travel through liquids but not solids, so their absence shows the outer core is solid.
- B
S waves travel through solids but not liquids, so their absence through the outer core supports the conclusion that it is liquid.
- C
P waves cannot travel through liquids, so their absence proves the outer core is liquid.
- D
Both P waves and S waves travel only through solids, so their paths cannot reveal the outer core’s state.
11
Choose all
1 point
Select all the statements that correctly distinguish Earth’s compositional layers from its mechanical layers.
- A
The crust, mantle, and core are compositional layers, while the lithosphere and asthenosphere are mechanical layers.
- B
The lithosphere consists only of crust and excludes any mantle material.
- C
The asthenosphere is a hotter, weaker part of the upper mantle that can flow slowly.
- D
The mantle is solid overall even though it can deform over long periods.
12
Open ended
1 point
Why do scientists compare ancient Earth materials with meteorites when estimating Earth’s age, rather than relying on a single Earth rock?
13
Choose one
1 point
Which combination contributed to the heating of early Earth as it formed?
- A
Repeated collisions and compression, along with radioactive decay.
- B
Only sunlight absorbed by Earth’s atmosphere.
- C
Only the condensation of water vapor into oceans.
- D
The flow of the mantle after Earth had fully cooled.
14
Choose one
1 point
Rain falls, erodes rock, and carries sediment into a river. Which Earth spheres are directly involved in this sequence?
- A
The biosphere, atmosphere, and cryosphere
- B
The atmosphere, geosphere, and hydrosphere
- C
The geosphere, biosphere, and cryosphere
- D
The hydrosphere, biosphere, and atmosphere
15
Choose one
1 point
Early Earth was hot enough for much of its material to melt or soften. Which process best explains how this led to a metallic core and rocky outer layers?
- A
Rocky material sank because it was denser than iron-rich material.
- B
Iron-rich material rose because it was heated more quickly.
- C
Dense iron-rich material sank while lighter rocky material rose.
- D
All material stayed evenly mixed as Earth cooled.
16
Choose one
1 point
A scientist is describing the rigid shell broken into tectonic plates, rather than grouping layers by composition. Which materials make up this shell?
- A
The crust and uppermost mantle, forming a rigid outer shell
- B
The crust alone, because the mantle is always liquid
- C
The entire mantle, because it is made of one material
- D
The liquid outer core and solid inner core
17
Choose one
1 point
Seismic monitoring shows that S waves do not pass through Earth’s outer core. What conclusion does this evidence support?
- A
S waves speed up in every material, so their arrival times identify the core.
- B
P waves cannot pass through liquids, so their absence identifies the outer core.
- C
Both P waves and S waves pass through liquids, but only S waves reveal boundaries.
- D
S waves do not travel through liquids, so their absence through the outer core indicates it is liquid.
18
True or false
1 point
Earth’s inner core remains solid because immense pressure at the planet’s center prevents it from melting, even though it is extremely hot.
- A
True
- B
False
19
Written response
1 point
What is the name of the hotter, weaker part of the upper mantle beneath the lithosphere that can flow slowly?
20
Written response
1 point
What property describes the outer-core material whose motion generates most of Earth’s magnetic field? Enter the property.