最新的GED Science - GED-Science免費考試真題
問題1
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?
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?
正確答案: B
問題2
A water softener is an ion exchange resin contained in a tank. The resin trades its sodium ions for the calcium and magnesium ions of the hard water.
Why is a water softener sometimes installed in homes?
A water softener is an ion exchange resin contained in a tank. The resin trades its sodium ions for the calcium and magnesium ions of the hard water.
Why is a water softener sometimes installed in homes?
正確答案: C
問題3
-- Exhibit- -- Exhibit -
According to the map, what do the states of Minnesota, Louisiana, Colorado, and Delaware have in common?
-- Exhibit- -- Exhibit -
According to the map, what do the states of Minnesota, Louisiana, Colorado, and Delaware have in common?
正確答案: D
問題4
Which of the following represents the approximate combined use (in quads) of natural gas and oil in 1997?
Which of the following represents the approximate combined use (in quads) of natural gas and oil in 1997?
正確答案: D
問題5
All kerosene stoves produce carbon monoxide and carbon dioxide gases as by-products of combustion. Both gases are dangerous to human beings.
When using a kerosene stove, which action provides the best protection against these harmful gases?
All kerosene stoves produce carbon monoxide and carbon dioxide gases as by-products of combustion. Both gases are dangerous to human beings.
When using a kerosene stove, which action provides the best protection against these harmful gases?
正確答案: A
問題6
Absorption is a process by which substances take in matter. During absorption, the matter becomes dispersed throughout the absorbing material.
Which is an example of absorption?
Absorption is a process by which substances take in matter. During absorption, the matter becomes dispersed throughout the absorbing material.
Which is an example of absorption?
正確答案: D
問題7
The shape and structure of the teeth in the mouth of an animal determine their function in
obtaining its food. The broad, sharp incisors are used for biting. The long, pointed canine teeth are used for tearing food, while the molars, which have a larger surface area, are used for grinding food.
Exhibit:
In certain animals, the canine teeth are longer than other teeth. Which of the following animals would be likely to have longer canines?
The shape and structure of the teeth in the mouth of an animal determine their function in
obtaining its food. The broad, sharp incisors are used for biting. The long, pointed canine teeth are used for tearing food, while the molars, which have a larger surface area, are used for grinding food.
Exhibit:
In certain animals, the canine teeth are longer than other teeth. Which of the following animals would be likely to have longer canines?
正確答案: A
問題8
-- Exhibit -
The carbon cycle is illustrated above. Two of the essential processes involved are photosynthesis in green plants and algae and respiration by almost all organisms. Respiration, as well as burning and other natural decomposition (breakdown) processes, contributes to the amount of CO2 in the air and soil. Photosynthesis uses up CO2 and produces O2, which, in turn, is used up in respiration and the burning of fossil fuels such as coal, oil, and gas.
-- Exhibit -
Based on the information and diagram, which process is most likely to increase the amount of CO2 in the atmosphere?
-- Exhibit -
The carbon cycle is illustrated above. Two of the essential processes involved are photosynthesis in green plants and algae and respiration by almost all organisms. Respiration, as well as burning and other natural decomposition (breakdown) processes, contributes to the amount of CO2 in the air and soil. Photosynthesis uses up CO2 and produces O2, which, in turn, is used up in respiration and the burning of fossil fuels such as coal, oil, and gas.
-- Exhibit -
Based on the information and diagram, which process is most likely to increase the amount of CO2 in the atmosphere?
正確答案: E
問題9
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?
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?
正確答案: A
問題10
Halley's comet has a greater chance of striking a planet as it nears the Sun
According to the diagram which of the following statements best supports this conclusion?
Exhibit:
Exhibit
Halley's comet has a greater chance of striking a planet as it nears the Sun
According to the diagram which of the following statements best supports this conclusion?
Exhibit:
Exhibit
正確答案: E
問題11
Review the material, then click Next to see the questions related to this material.
You will be able to use an Information button to view the material on each question screen.
An airplane that is flying through the air is affected by basically four forces acting on it.
They are indicated on the diagram below.
-- Exhibit --
An airplane that is flying through the air is affected by basically four forces acting on it. They are indicated on the diagram below.
-- Exhibit -
When the airplane is flying at a constant speed, all of the forces acting on the plane are in balance.
If all four forces shown in the diagram are in balance, which statement best describes the situation? (The wind speed or turbulence has no effect on the plane's position or motion.)
Review the material, then click Next to see the questions related to this material.
You will be able to use an Information button to view the material on each question screen.
An airplane that is flying through the air is affected by basically four forces acting on it.
They are indicated on the diagram below.
-- Exhibit --
An airplane that is flying through the air is affected by basically four forces acting on it. They are indicated on the diagram below.
-- Exhibit -
When the airplane is flying at a constant speed, all of the forces acting on the plane are in balance.
If all four forces shown in the diagram are in balance, which statement best describes the situation? (The wind speed or turbulence has no effect on the plane's position or motion.)
正確答案: A
問題12
Soil is formed when the rock at Earth's surface weathers. Normally, soil develops into three layers, called horizons. The illustration below shows the A, B, and C horizons of a typical soil profile.
Based on the diagram, if the surface vegetation were removed, which would be the likely effect on the soil?
Soil is formed when the rock at Earth's surface weathers. Normally, soil develops into three layers, called horizons. The illustration below shows the A, B, and C horizons of a typical soil profile.
Based on the diagram, if the surface vegetation were removed, which would be the likely effect on the soil?
正確答案: D
問題13
During food digestion, nutrients are broken down through mechanical and chemical processes. The mechanical phase of digestion begins when you take a bite of food. Food is then physically broken down into smaller particles so that digestive enzymes can act. Chemical digestion involves a change in the chemical nature of nutrients so that they can be broken down further and absorbed into the bloodstream.
Which digestive activity is an example of chemical digestion?
During food digestion, nutrients are broken down through mechanical and chemical processes. The mechanical phase of digestion begins when you take a bite of food. Food is then physically broken down into smaller particles so that digestive enzymes can act. Chemical digestion involves a change in the chemical nature of nutrients so that they can be broken down further and absorbed into the bloodstream.
Which digestive activity is an example of chemical digestion?
正確答案: D