GED Science Exam (GED-Science) Free Practice Test

Question 1

Exhibit:

Based on this article, which statement is true for any defective gene a person carries?

A. A physical examination will reveal it.

B. All defective genes are eliminated before birth.

C. The person's children will have a 100 percent chance of receiving that same gene.

D. The person will never be able to have children.

E. The person may be unaware of this defect until he or she has children.

Correct Answer: E

Question 2

In the diagram below, the shaded parts show how much water each boat displaces as it floats. Boat B weighs more than boat A, since it has more people aboard. Boat B displaces more water than does boat A.
For floating to happen, the weight of the water displaced has to be equal to the weight of the floating boat.
-- Exhibit -
In the diagram below, the shaded parts show how much water each boat displaces as it floats. Boat B weighs more than boat A, since it has more people aboard. Boat B displaces more water than does boat A.
For floating to happen, the weight of the water displaced has to be equal to the weight of the floating boat.

Flood waters do not have to be very deep to float a car. In fact, only two feet of water, about knee high, will float the average car.
Which statement BEST explains why a car floats in such a small amount of water?

A. The car is not equipped with four wheel drive.

B. The car is not equipped with an automatic transmission.

C. The water makes the road surface too slick for the car to maintain traction, increasing the braking distance.

D. The weight of water that the car displaces is the same as the weight of the whole car.

E. The car's center of gravity is at the two foot line.

Correct Answer: D

Question 3

Refer to the following information and table.
The table below indicates the results of a preliminary study of a flu medication (RX). The subjects were randomly selected groups of males, ages 50-70, residing in a North American city with a population of more than one million people.

Based on the data in the chart and the information provided, which treatment group was the control group in this preliminary study?

A. D

B. A

C. B

D. C

E. E

Correct Answer: B

Question 4

A diagram of an airplane in flight is shown below. During flight, forces are produced on the wing by air flowing over the wing and causing certain air pressures to develop on its top and bottom surfaces. In the illustration below, all four forces are in balance.

Based on the information and diagram, which type of motion should be expected from the plane?

A. steep vertical dive

B. level flight because the lifting force and gravity are balanced

C. sinking because the high pressure creates a net downward force

D. upside-down motion because of the high pressure under the wing

E. backward motion because of the pressures

Correct Answer: B

Question 5

Students in a biology class were asked to construct hypotheses about the relationship between air temperature and the number of times crickets chirp per minute. They listened to a tape of crickets chirping at six different temperatures. The students counted the number of chirps per minute and recorded their results, which are shown in the table below.

Which statement best describes the relationship between the number of chirps and the air temperature?

A. The crickets will not chirp when the temperature is above 81(degrees) F.

B. As the temperature increases, the number of chirps increases.

C. As the temperature decreases, the number of chirps increases.

D. There is no relationship between the number of chirps and the temperature.

E. The crickets will not chirp at 0(degrees) F.

Correct Answer: B

Question 6

Based on the information and diagram, which container has the most thermal energy?

A. D

B. A

C. B

D. C

E. E

Correct Answer: E

Question 7

A tsunami is an unusually large ocean wave, which is sometimes formed by earthquakes.
The height of a tsunami increases as it approaches shore. In the open ocean, tsunamis can travel at 300 to 400 miles per hour.
Based on this information, which statement must be true?

A. Tsunamis are sometimes found in small lakes.

B. Tsunamis travel at 100 miles per hour.

C. The height of a tsunami located 100 miles offshore is low.

D. Tsunamis have killed millions of people in this century.

E. There are no known causes of tsunamis.

Correct Answer: C

Question 8

A cell, the basic unit of living things, contains microscopic structures called organelles. A group of specialized cells of the same type forms a tissue, such as muscle or nerve tissue. An organ such as the liver is composed of different kinds of tissues that contribute to its overall function. A group of related organs form an organ system, such as the digestive system. A living organism may contain a number of organ systems working together to carry on the life functions.
Based on the information, in which category does the human heart belong?

A. organ system

B. organ

C. cell

D. organelle

E. tissue

Correct Answer: B

Question 9

A compound is composed of atoms from two or more elements that are chemically bonded. Some examples of common compounds are water, alcohol, and sugar.
A compound can be represented in a number of ways. One is the structural diagram, which depicts each atom within a compound and the bonds that join those atoms. Another representation is the molecular formula, a shorthand notation of the elements and numbers
of atoms of each element in a single molecule of the compound.

The following structural diagram represents isopropanol, commonly referred to as isopropyl (rubbing) alcohol.
Based on the structural diagram to the left, which molecular formula represents isopropyl alcohol?

A. C3H3OH

B. C4H4OH

C. C3H7OH

D. C2H5OH

E. C2H4OH

Correct Answer: C

Question 10

In a population cycle, predators eat and reduce the number of prey. If the number of predators is reduced, the number of prey will gradually increase. Eventually, the predator population will increase, and the population cycle will continue.
Which pair best demonstrates a predator-prey relationship?

A. snakes and mice

B. frogs and toads

C. honeybees and ants

D. sheep and cattle

E. robins and pigeons

Correct Answer: A

Question 11

Getting rid of solid waste is a major problem in many cities. Open spaces for landfills are becoming scarce. Burning solid waste may produce harmful gases as well as particles in the surrounding air. Recycling is useful, but effective techniques for recycling some materials have yet to be developed. Marine disposal may damage the delicate ecosystems in this fragile environment.
Which of the following solid waste disposal techniques would MOST LIKELY result in air pollution?

A. recycling

B. landfills

C. marine disposal

D. landscaping

E. burning

Correct Answer: E

Question 12

As plants grow, they absorb nutrients from the soil. Plant leaves can be carefully observed to determine the relative healthiness of the plant and whether it is suffering from a nutrient deficiency. The chart below shows the most common nutrient deficiencies and their effects on plant leaves.
Sometimes an observed symptom can have more than one cause.

Based on the information, which plant leaf symptom could have resulted from more than one type of nutrient deficiency?

A. green leaves

B. dark leaves

C. small leaves

D. distorted leaves

E. yellow leaves

Correct Answer: E

Question 13

Flowers are the reproductive part of some plants. The stamen is the male reproductive organ while the pistil is the female organ. At the tip of the stamen is the anther, which forms pollen grains in which the sperm cells are formed. Pollen grains are transferred to the pistil by wind, water, insects, and other mechanisms.
Which statement best interprets the diagram and information?
Exhibit:

A. Bees may distribute pollen to other flowers.

B. Sperm cells are produced in the pistil.

C. The stamen produces the egg cells.

D. The pollen grains serve merely as food for insects.

E. Pollen grains produce the egg cells.

Correct Answer: A

Question 14

The death rate from heart disease fell more than 8 percent in just one year during the 1980s. Advances in public awareness of heart disease and in treatments for it are thought to be partially responsible for the decline. New heart drugs, a technique called angioplasty for clearing the arteries, and surgical advances have also assisted in reducing heart disease fatalities, as has increased interest in a healthy lifestyle and diet.
Which of the following was a contributing factor for the more than 8-percent decrease in heart disease mortality between 1988 and 1989?

A. More people regularly slept 8 hours per night.

B. New kinds of heart medicine became available for public use.

C. More people used the "buddy system" while engaging in strenuous activities.

D. Exercise fads became less popular.

E. Sunscreen products were used more frequently.

Correct Answer: B

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GED Science (GED-Science) Free Practice Test