Free GED SCIENCE Exam Braindumps
GED Section 3: Science Questions 116–120 (page: 25)

Transpiration is the evaporation of water produced during photosynthesis from the parts of a plant exposed to air, especially from its leaves. The rate of transpiration varies among species of plants, as seen in the table below.


Which statement best explains why the transpiration rate of a cactus is so much lower than that of a rose bush and a dogwood?

Susan is studying air pressure and makes a simple mercury barometer as shown below. She knows that air exerts pressure. More pressure on the surface of the mercury in the bowl will cause the mercury level to rise. Less pressure will cause the mercury to fall. High barometric pressure is often associated with fair weather, and low barometric pressure is associated with rain.
Susan is enjoying a bright, sunny day when she hears a local weather forecaster predict rain for tomorrow.

When Susan checks her barometer tomorrow, which change is she most likely to note?

Temperature affects how well gases and solids dissolve to form solutions. Gas solubility increases with decreasing temperature. Cold water can hold more oxygen than warm water.
Fish require dissolved oxygen in the water for respiration. During the hot summer, Allan goes fishing at a nearby lake.
Based on the information, which statement indicates where and why Allan would find the most fish?

Nitrites are used by the meat-packing industry to maintain the appetizing red color of cured meats and smoked fish and to protect the consumer from botulism. However, in the acid environment of the stomach, nitrites can combine with amines to form nitrosamines, which are potent carcinogens.
Which behavior is most effective for all urban consumers to minimize exposure to nitrosamines?

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?