GED Science - GED-Science Exam Practice Test
Question 1
The battery of an automobile produces electricity from a chemical reaction. This electricity leaves the battery from a post called a terminal and is used in starting the engine. Sometimes a crusty deposit forms on the terminals, preventing the engine from starting. Simply cleaning off the deposit often restores the battery to operable condition.
Which effect does the deposit have on the battery terminals?
Which effect does the deposit have on the battery terminals?
Correct Answer: D
Question 2
-- Exhibit -
The most realistic description of energy flow through an ecosystem is a food web that represents an interconnected series of food chains. In general, the greater the number of alternative channels through which energy can flow, the greater the stability of the food web and the ecosystem.
The diagram shows a typical food web for a wet meadow. The hawk and the fox obtain nourishment by preying upon rabbits, frogs, snakes, and mice. The fox may even eat grasshoppers. If, for example, the rabbit population is reduced, possibly because of bad weather during the breeding season, the fox and hawk would shift their predatory pressure to other forms of prey. The rabbit population would then have a chance to bounce back and the ecosystem would remain stable.
-- Exhibit -
Based on the diagram, which consumer would have the greatest chance of surviving if the amount of available prey changes during the different seasons?
The most realistic description of energy flow through an ecosystem is a food web that represents an interconnected series of food chains. In general, the greater the number of alternative channels through which energy can flow, the greater the stability of the food web and the ecosystem.
The diagram shows a typical food web for a wet meadow. The hawk and the fox obtain nourishment by preying upon rabbits, frogs, snakes, and mice. The fox may even eat grasshoppers. If, for example, the rabbit population is reduced, possibly because of bad weather during the breeding season, the fox and hawk would shift their predatory pressure to other forms of prey. The rabbit population would then have a chance to bounce back and the ecosystem would remain stable.
-- Exhibit -
Based on the diagram, which consumer would have the greatest chance of surviving if the amount of available prey changes during the different seasons?
Correct Answer: D
Question 3
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?
Based on the information, in which category does the human heart belong?
Correct Answer: E
Question 4
Daily weather patterns are often the result of temperature differences, patterns of air flow, relative humidity, condensation, or evaporation. A warm front forms when a warmer air mass pushes a cold air mass ahead of it. Precipitation over a large area can occur along a warm front.
Based on this information and diagram, what would most likely happen if a mass of hot, humid air encountered a colder air mass in the northern portion of Earth's surface?
Based on this information and diagram, what would most likely happen if a mass of hot, humid air encountered a colder air mass in the northern portion of Earth's surface?
Correct Answer: E
Question 5
Touch sensors of nerves adapt to some degree after they have been stimulated for a period of time. On the first touch, a very high impulse rate of nerve signals is sent to the brain. But the rate then slows until some sensors stop responding altogether.
Which of the following is an example of the nerve touch sensors slowing down?
Which of the following is an example of the nerve touch sensors slowing down?
Correct Answer: B
Question 6
On a sunny day, a magnifying glass can concentrate sunlight to the point where the light can cause paper to burn.
Which of the following materials would be the best substitute for a magnifying glass?
Which of the following materials would be the best substitute for a magnifying glass?
Correct Answer: A
Question 7
Based on the information, which ingredient of ordinary bread is the biggest source of carbohydrates?
Correct Answer: D
Question 8
As pressure in a closed container is increased, the volume, or amount of space that a gas takes up, decreases. Divers who work underwater use tanks containing oxygen in order to breathe. The amount of oxygen in the tanks allows the divers to stay underwater for some time, yet the tanks are not huge.
Which statement best explains this occurrence?
Which statement best explains this occurrence?
Correct Answer: A
Question 9
If a weight with a string attached is swung in a horizontal circular motion around in the air, the path of the weight will appear as shown in the figure at the left.
If the string breaks when the weight is at position A, the weight will fly away in a straight line tangent to the circular path.
In order for the weight to hit an object located at position X, the person should let go of the string when the weight is located at which position?
If the string breaks when the weight is at position A, the weight will fly away in a straight line tangent to the circular path.
In order for the weight to hit an object located at position X, the person should let go of the string when the weight is located at which position?
Correct Answer: D
Question 10
A pet shop wants to install a fountain that contains live fish. The temperature in the facility is kept at 67(degrees) F (19(degrees) C) throughout the year.
The following chart gives the preferred temperature range for certain fish species.
Which fish would be most likely to thrive in this environment?
The following chart gives the preferred temperature range for certain fish species.
Which fish would be most likely to thrive in this environment?
Correct Answer: A
