GED SCIENCE Exam Questions and Answers

QUESTION: 26

There are usually thirty-two teeth in the mouth of an adult human. They are divided into four groups: incisors, canines, premolars, and molars. The diagram below shows the arrangement of these teeth in the mouth.

Which statement best explains why your teeth have so many shapes?

The different shapes allow all of the teeth to fit in your mouth.
All the teeth in your mouth are used for the same purpose.
The different shapes had a purpose in prehistoric man but not in the modern man.
Teeth allow you to swallow more effectively.
Each tooth has a specialized biting or chewing function.

Answer(s): E

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QUESTION: 27

The nightshade family of plants includes more than 2000 species of herbs, shrubs, and small trees. Plants with edible parts include the potato, tomato, eggplant, and red pepper. Some nightshade members such as jimsonweed and belladonna contain poisonous substances. Tobacco and petunias are also in the nightshade family.
Which of the following most accurately describes the entire group of plants in the nightshade family?

poisonous plants
edible plants
no economically important species
no agriculturally important plants
a large variety of species

Answer(s): E

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QUESTION: 28

Burning paper requires the chemical combination of oxygen in the air with the material composing the paper. Which would cause the paper to burn faster?

wetting the paper before burning
using a thicker piece of paper
using only pastel shades of paper
putting the burning paper in a closed container
increasing the oxygen around the paper

Answer(s): E

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QUESTION: 29

-- Exhibit

-- Exhibit --
Nancy and Sophia are studying weather in science class. Nancy tells Sophia that warm air ismore dense than cold air.
Which of the following statements proves that Nancy's belief is false?

A cold air mass can push a warm air mass upward.
A warm air mass cannot form clouds.
Cool, dry air can move around warm, moist air.
Cold, dry air pushes clouds past a front.
Precipitation forms where cold and warm air masses meet.

Answer(s): A

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QUESTION: 30

Dr. Mullin collected data on the number of leaves that fell from a tree. She noticed that the number of leaves that fell varied substantially during the seasons of the year. The graph at the left describes Dr. Mullin's findings.

Based on the information and graph, which action would best help explain the data?

measure the tree's height
measure the tree's diameter
measure the tree's circumference
measure the length of the tree's upper and lower branches
analyze the seasonal weather patterns of the area

Answer(s): E

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GED GED SCIENCE Exam (page: 6) GED Section 3: Science Updated on: 09-Feb-2026

QUESTION: 26

QUESTION: 27

QUESTION: 28

QUESTION: 29

QUESTION: 30

GED GED SCIENCE Exam (page: 6)
GED Section 3: Science
Updated on: 09-Feb-2026