GED-Science 試験問題を無料オンラインアクセス

The physical and chemical properties of a substance are affected by many factors, such as the molecular makeup of a substance and its temperature. The thicker and more viscous a liquid is, the more slowly an object should fall through it.

In which of the following situations would a marble be MOST LIKELY to fall at the fastest rate when dropped into syrup in a graduated cylinder?

• A.syrup kept at room temperature
• B.syrup warmed for 20 minutes
• C.syrup stored in the refrigerator for an hour
• D.syrup stored in the freezer for an hour
• E.syrup stirred in a blender for 10 minutes at room temperature

Heart rate is affected by the body size of an animal. The longer the path for blood to travel through the body, the longer the time between heartbeats. The graph below illustrates the heart rates of selected animals, the largest of which is the elephant, and the smallest of which is the mouse.

Based on the information and chart, which statement is the best interpretation of the relationship between heart rate and body size?

• A.There is no relationship between heart rate and body size.
• B.Humans always have the slowest heart rate.
• C.The longer the pathway for the blood to flow through the body, the faster the heart beats.
• D.The smaller the animal, the faster the heart rate.
• E.The larger the animal, the faster the heart rate.

An autotroph is an organism that can make its own food. A heterotroph, an organism that is unable to make its food, relies on other living things for food and energy.
Which organism listed below could be classified as an autotroph?

• A.bird
• B.snake
• C.frog
• D.tree
• E.deer

The waters of the Antarctic region contain an abundance of animal and plant life. The large number of living organisms stems partly from the water's high mineral content and partly from the constant cold temperature. The continual flow of materials from below brings nitrates and phosphates into the surface zone. Cold water holds more dissolved carbon dioxide and oxygen than does warm water. The abundance of carbon dioxide and the available sunlight allow photosynthesis to occur in the surface waters almost continuously during the long daylight hours in the summer.
If the temperature of the Antarctic waters increased by a marked degree, which of the following statements would explain a decrease in the abundant life there now?

• A.Warm water contains less dissolved carbon dioxide needed for photosynthesis.
• B.Minerals dissolve more readily in cold water.
• C.In warm water, oxygen and carbon dioxide combine to form ammonia and other poisonous gases.
• D.Warm water contains more oxygen than cold water.
• E.Warm water evaporates much more slowly than cold water.

Exhibit:

Based on the graph at the left, which statement is FALSE?

• A.Asia has more coal than the other continents combined.
• B.North America has over 4000 billion tons of coal.
• C.Africa has more coal reserves than Europe.
• D.Only one continent has over 10,000 billion tons of coal.
• E.Asia has more coal than any other continent.