8th grade CAST prep earth science

Question 1

The water cycle is powered mainly by:

Accepted Answer

The sun

Question 2

Which process breaks down rocks into smaller pieces?

Accepted Answer

Weathering

Question 3

What is the main cause of the seasons on Earth?

Accepted Answer

Earth's tilted axis

Question 4

Which of the following causes ocean tides?

Accepted Answer

The moon’s gravity

Question 5

What drives the movement of tectonic plates?

Accepted Answer

Convection currents in the mantle

Question 6

Which of these is the largest?

Accepted Answer

Galaxy

Question 7

Which celestial body has the strongest gravity in our solar system?

Accepted Answer

Sun

Question 8

What type of rock forms from cooled magma or lava?

Accepted Answer

Igneous

Question 9

Which layer of Earth is made of solid metal?

Accepted Answer

Inner core

Question 10

Which of the following best describes a galaxy?

Accepted Answer

A group of stars, dust, and gas held together by gravity

Question 11

Which of these human activities contributes most to climate change?

Accepted Answer

Driving gas-powered vehicles

Question 12

What is one main effect of deforestation?

Accepted Answer

Habitat loss for animals

Question 13

Volcanoes are most likely to form at:

Accepted Answer

Plate boundaries

Question 14

Which of the following is a renewable energy source?

Accepted Answer

solar power

Question 15

What is the greenhouse effect?

Accepted Answer

Trapping of heat by Earth’s atmosphere

Question 16

Which process in the water cycle involves water vapor cooling into droplets?

Accepted Answer

Condensation

Question 17

What is the difference between a meteor and a meteorite?

Accepted Answer

A meteor burns in the atmosphere; a meteorite hits Earth

Question 18

What causes earthquakes?

Accepted Answer

Movement of tectonic plates

Question 19

Which planet is known for its rings?

Accepted Answer

Saturn

Question 20

What tool is used to measure earthquakes?

Accepted Answer

Seismograph

Question 21

Why does the moon appear to change shape during a month?

Accepted Answer

Changes in moon’s position relative to the earth and the sun

Question 22

What causes day and night on Earth?

Accepted Answer

Earth's rotation on its axis

Question 23

Which layer of Earth is broken into tectonic plates?

Accepted Answer

Lithosphere

Question 24

Which gas makes up most of Earth’s atmosphere?

Accepted Answer

Nitrogen

Question 25

What is groundwater?

Accepted Answer

Water stored underground

8th grade CAST prep earth science

Questions 25

8th grade CAST prep earth science

Questions 25