GED-Science無料問題集「GED Science」

質問 1

Bacteria are one-celled organisms that grow and reproduce in the right conditions. They
reproduce by dividing in half and can divide in as little as every 20 minutes. The graph below describes how the growth of bacteria actually changes over time.

Which section of the graph shows what happens when the food supply is used up and the bacteria are dying?

（A）E

（B）D

（C）B

（D）C

（E）A

正解：A 解答を投票する

質問 2

According to the information in the bar graph, what was the dominant energy source in the United States for the years 1970 and 1997?

（A）hydroelectric

（B）oil

（C）coal

（D）natural gas

（E）nuclear

正解：B 解答を投票する

質問 3

A loud sound, such as from a radio at a high volume, can be "deadened" more by hanging a heavy drape between the radio and the listener than by using a sheet of plywood.

Based on the information, which statement would justify this conclusion?

（A）Plywood is harder to hang than drape.

（B）The plywood absorbs more sound than the drape does.

（C）The drape absorbs more sound than the plywood does.

（D）Sound waves would not reach the drape.

（E）The radio is playing louder than it should.

正解：C 解答を投票する

質問 4

For an organism to survive, it needs food, water, oxygen, living space, and the ability to maintain a relatively constant body temperature. Warm-blooded animals have ways to adjust their body temperature to compensate for fluctuations in environmental temperature. The body temperatures of cold-blooded animals, such as fish, vary directly with the temperature of their environments.
Power plants and factories can release heated water into nearby rivers and steam into the air.
Which animals downstream of a power plant would be the most affected by thermal pollution discharges from the power plant?

（A）people fishing in the river

（B）elk grazing near the river

（C）birds sitting on the riverbank

（D）fish swimming in the river

（E）moose standing in the shallow river water

正解：D 解答を投票する

質問 5

The results of a study of an experimental drug treatment seem to suggest that it is quite effective in treating an eye disease. The table below indicates the results of the use of the
experimental drug therapy on 500 males who are 40-60 years old.

Based on the information and table, which statement is the best conclusion?

（A）The experimental drug therapy shows promise, but it needs to be tested much more fully.

（B）The strong recovery rate of human subjects treated with established drug therapy makes the experimental drug therapy unnecessary.

（C）The experimental drug therapy can now be used with any patient who has this disease.

（D）Similar results would have been obtained from a study of females in the same age group.

（E）Most of the human subjects in the study would have had a natural reversal of the symptoms even if they were not treated.

正解：A 解答を投票する

質問 6

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）sheep and cattle

（C）robins and pigeons

（D）honeybees and ants

（E）frogs and toads

正解：A 解答を投票する

質問 7

A series circuit is one in which current flows only in one path. The same amount of current flows through the entire circuit when it is in series, and each bulb receives the same amount of current. If there is a break in the circuit, none of the bulbs will light.

The diagram at the left shows a series circuit. Which is an example of a series circuit?

（A）a chandelier

（B）car headlights with high and low beams

（C）a string of lights that goes out at the same time if one bulb burns out

（D）ceiling light fixture with 3 lightbulbs

（E）fluorescent ceiling lights

正解：C 解答を投票する

質問 8

The following symbols represent a shortcut for representing an element. For example, O
stands for oxygen, H for hydrogen, and C for carbon. H2O is the formula for water. The subscript 2 in the formula indicates that there are two atoms of hydrogen in a water molecule. If there is no subscript after a symbol, the subscript is assumed to be one. Therefore, one molecule of water contains three atoms: two hydrogen atoms and one oxygen atom.
Based on the information, how many atoms are represented in C12H22O11?

（A）12

（B）3

（C）45

（D）11

（E）22

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 9

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?

（A）Electricity can travel rapidly in the Earth's atmosphere.

（B）Light travels faster than sound.

（C）Lightning consists of a flash of light followed by a loud sound.

（D）Sound travels somewhat faster than light.

（E）The density of the atmosphere decreases the speed of light.

正解：B 解答を投票する

質問 10

Making products from recycled materials, such as aluminum cans, glass, and plastic usually saves energy and other resources. For example, it takes about 75% less energy to make steel from scrap than from ore. All forms of recycling involve some energy to produce the recycled materials, a process that also results in the production of some pollution.

The chart at the left shows the energy savings from recycling.
When Anil is at the grocery store, he can choose to buy juice in a glass bottle, an aluminum can, a plastic jug, a juice box (paper), or foil-covered juice container.
If Anil's community requires that he recycles, which container would provide the MOST overall energy savings?

（A）aluminum can

（B）plastic jug

（C）glass bottle

（D）waxy, cardboard juice box

（E）foil-covered container

正解：A 解答を投票する

質問 11

Temperature, pressure, and volume are closely interrelated variables. The friction between an automobile's tires and the road surface causes an increase in the temperature of the air in the tires and results in an increase in tire pressure.
Before a practice run, a race car driver must check the tires carefully. On a very hot day, which procedure would be the BEST choice?

（A）Coat the tires with a lubricant to lessen friction.

（B）Make the tire pressure lower than normal.

（C）Do nothing about the tires.

（D）Be certain that the tires have no treads to avoid friction.

（E）Make the tire pressure higher than normal.

正解：B 解答を投票する

質問 12

Advances in rocketry are tied closely to the application of Newton's Laws of Motion. These laws help us understand how things move. Movement occurs when forces are unbalanced; if opposing forces counterbalance each other, then no movement occurs.
In the diagram below, the amount of thrust (force) produced by air is determined by the air escaping from the balloon.

Based on the information and diagram, which statement best describes what happens
when air begins to escape from the balloon?

（A）stays in the same spot

（B）moves in the same direction as the released air

（C）moves straight downward

（D）breaks and doesn't move

（E）moves in the opposite direction to the released air

正解：E 解答を投票する

質問 13

The Perfect Food Company makes Energy Bars for use as a meal replacement or diet supplement.

A Perfect Food Company spokesperson claims that Perfect's Energy Bar is superior to other nutritional bars.
Which explanation is most likely based on opinion rather than fact?

（A）have 225 calories

（B）taste better

（C）contain 40% protein

（D）are fat free

（E）are chocolate-covered

正解：B 解答を投票する

GED-Science 無料問題集「GED Science」

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