Spheres of Earth — Unit test

Question 1

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

Revolt · Accepted Answer

Devonian

Question 2

Which statement describes abiotic factors in an environment?

Revolt · Accepted Answer

Soil retains water and nutrients.

Question 3

Study the timeline.

Revolt · Accepted Answer

200 million years

Question 4

Which phrase describes faults?

Revolt · Accepted Answer

cause rocks to break and move

Question 5

Humans’ use of rocks and minerals as building materials is an example of which interaction?

Revolt · Accepted Answer

an interaction between the biosphere and the geosphere

Question 6

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

Revolt · Accepted Answer

Scientists used radioactive dating to study the age of material from the moon and Earth.

Question 7

Which statement describes potassium-argon dating?

Revolt · Accepted Answer

Potassium-40 decays into argon gas over time.

Question 8

The diagram illustrates radioactive decay.

Revolt · Accepted Answer

Structure 1 is an unstable atom that turns into structure 2, a new atom.

Question 9

Which landform is part of the cryosphere?

Revolt · Accepted Answer

glacier

Question 10

Which phrase describes one main feature of the atmosphere?

Revolt · Accepted Answer

protects Earth’s surface

Spheres of Earth — Unit test Answers