Test Prep GED Section 3 Science Exam Questions

Question 6 of 75

Change of phase is a process whereby matter changes form (solid, liquid, gas). Which one of the following constitutes a phase change?

A.

condensation of water vapor

B.

photosynthesis

C.

digestion of food

D.

dry-cleaning

E.

exhaling

Suggested Answer: A

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Question 7 of 75

Two negatively charged spheres -

A.

repel each other.

B.

attract each other.

C.

neither attract nor repel each other.

D.

can either attract or repel each other depending on their position.

E.

attract each other only when the distance between them is small.

Suggested Answer: A

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Question 8 of 75

Which statement about energy and/or matter is incorrect?

A.

Matter and energy can’t be destroyed.

B.

Matter and energy can’t be created.

C.

All matter tends toward more disordered states.

D.

Energy can be stored and transferred.

E.

Heat energy is composed of heat atoms.

Suggested Answer: E

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Question 9 of 75

The boiling point in hydrocarbons (molecules containing H and C) increases with increasing molecular weight due to larger intermolecular forces. Which of these hydrocarbons would you expect to have the highest boiling point?
Exam GED Section 3 Science: Question 9 - Image 1

Exam GED Section 3 Science: Question 9 - Image 1

A.

a

B.

b

C.

c

D.

d

E.

e

Suggested Answer: E

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Question 10 of 75

People wear woolen gloves in the winter because gloves

A.

generate heat energy through radiation.

B.

increase the temperature of cold air through convection.

C.

decrease the loss of body heat to surroundings through insulation.

D.

increase the amount of heat energy generated by the body through conduction.

E.

transform cold wind energy into thermal energy.

Suggested Answer: C

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