Section Three Science

Here you have the best Test Prep GED Section 3 Science practice exam questions

You have 75 total questions across 15 pages (5 per page)
These questions were last updated on February 7, 2026
This site is not affiliated with or endorsed by Test Prep.

Question 1 of 75

In an acid base reaction, an acid reacts with a base to produce water and a salt. The pH scale can be used to describe the acidity of a liquid. Look at the diagram below. Which two liquids could undergo an acid base reaction?
Exam GED Section 3 Science: Question 1 - Image 1

Exam GED Section 3 Science: Question 1 - Image 1

A.

bleach and ammonia

B.

lye and ammonia

C.

blood and saliva

D.

bleach and vinegar

E.

stomach acid and beer

Suggested Answer: D

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Question 2 of 75

According to Newtons laws of motion, an object set in motion remains in motion unless a force acts on it. If you suspend an object from a string and make it swing, the object will swing for a while, then slow down and stop. Why does the suspended object stop swinging?

A.

because an object at rest remains at rest unless a force acts upon it

B.

because the mass of the object is too small to maintain the motion

C.

because energy is the ability to do work

D.

because gravity is pulling it toward the Earth

E.

because energy of motion is converted to heat through friction with air

Suggested Answer: E

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Question 3 of 75

In an exothermic process, heat is released by the process to the surroundings. An example of an exothermic process is burning wood. An endothermic process requires the input of heat from the surroundings. An example of an endothermic process is boiling water. Which of the following is an endothermic process?

A.

detonation of an explosive

B.

melting ice

C.

burning paper

D.

the formation of helium on the sun

E.

freezing water

Suggested Answer: B

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Question 4 of 75

Ice floats on water because -

A.

ice is less dense than water.

B.

water conducts heat better than ice.

C.

ice has a lower temperature.

D.

heat from the Earth’s core travels upward, cooling the bottom first.

E.

it needs energy from the sun to melt.

Suggested Answer: A

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Question 5 of 75

Which of the following is NOT true about gravity?

A.

The more massive two objects are, the greater the gravitational force between them.

B.

Gravitational force between two objects depends only on the mass of the larger object.

C.

Gravitational force between two objects depends on the distance between them.

D.

People can jump higher on the moon than on Earth because the gravitational force between a person and the moon is lower than the gravitational force between a person and the Earth.

E.

A gravitational force exists between the moon and the sun.

Suggested Answer: B

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About the Test Prep GED Section 3 Science Certification Exam

About the Exam

The Test Prep GED Section 3 Science (Section Three Science) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 75 practice questions across 15 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our GED Section 3 Science questions are regularly updated to reflect the latest exam objectives.