PAX PAX Earth Science

Question 1

What is the correct order of Earth's layers from the surface to the center?

Accepted Answer

Crust, Mantle, Outer Core, Inner Core

Answer

Earth's layers from surface to center are: crust, mantle, outer core (liquid), and inner core (solid).

Question 2

What type of rock is formed when magma cools and solidifies?

Accepted Answer

Igneous

Answer

Igneous rock forms when magma (underground) or lava (at the surface) cools and solidifies.

Question 3

Which layer of Earth's atmosphere contains the ozone layer?

Accepted Answer

Stratosphere

Answer

The ozone layer is located in the stratosphere, approximately 15–35 km above Earth's surface, where it absorbs harmful UV radiation.

Question 4

What is the process called when water vapor cools and changes into liquid water?

Accepted Answer

Condensation

Answer

Condensation is the process by which water vapor loses energy and changes into liquid water, forming clouds or dew.

Question 5

What is the most abundant gas in Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Nitrogen (N₂) makes up approximately 78% of Earth's atmosphere, while oxygen accounts for about 21%.

PAX Exam Practice Test