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GED Science Changed GED-Science Questions

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Total 300 questions

GED Science Exam Questions and Answers

Question 25

During an electrical storm, a lightning flash is seen before the sound of thunder that it generated can be heard. The farther a person is from the storm, the greater the time interval between the light flash and the arrival of the sound. Which of the following statements best explains this phenomenon?

Options:

A.

Light travels faster than sound.

B.

Sound travels somewhat faster than light.

C.

Electricity can travel rapidly in the Earth’s atmosphere.

D.

The density of the atmosphere decreases the speed of light.

E.

Lightning consists of a flash of light followed by a loud sound.

Question 26

Air is a mixture of gases, mostly nitrogen and oxygen, but it also contains a small amount of water vapor. Depending on its temperature, water can exist in any of the three states of matter.

In the diagram at the left, water droplets have formed on the outside of the can, and the can contains pieces of ice.

Based on the information and diagram, which statement regarding the droplets on the outside of the can is the most accurate?

Options:

A.

The can leaked water from the ice cubes as they melted.

B.

The ice in the can cooled the air around the can, causing the water droplet formation.

C.

Liquid on the can is CO2 from the exhaled air of the observers of the demonstration.

D.

Many more droplets would have appeared if a styrofoam cup had been substituted for the tin can.

E.

Many more droplets will form on the outside of the can on a windy day, when the air is less humid.

Question 27

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:

Options:

A.

The stamen produces the egg cells.

B.

The pollen grains serve merely as food for insects.

C.

Bees may distribute pollen to other flowers.

D.

Pollen grains produce the egg cells.

E.

Sperm cells are produced in the pistil.

Question 28

When choosing an organism to study, geneticists prefer the following characteristics. The organism should be small, have a fast growth rate, and have the ability to produce many offspring.

Based on these criteria, which plant would be LEAST useful for a genetic study?

Options:

A.

moss

B.

grass plant

C.

dandelion

D.

oak tree

E.

tomato plant

Page: 7 / 11
Total 300 questions