Free GED SCIENCE Exam Braindumps
GED Section 3: Science Questions 106–110 (page: 23)

When water evaporates from a surface, the surface is cooled. From this information, which of the following would MOST likely keep the human body at a constant temperature?

The half-life of a radioactive substance is defined as the time required for one-half of the atoms of a radioactive sample to decay.
Radioactive carbon-14 has a half-life of 5730 years. After 5730 years, an original 2.00 g sample of carbon-14 will decay to 1.00 g.
At the end of a second half-life, how much of the 1.00 gram of carbon-14 will decay?

Windchill is the rate of heat loss on the human body resulting from the combined effects of low temperature and wind. As wind speeds increase, heat is carried away from the body at a faster rate, thus lowering both the skin temperature and, ultimately, the internal body temperature. Many other factors can affect the impact of windchill, such as type of clothing worn, the amount of flesh exposed, and an individual's physical condition.
Based on the information provided, which of these practices would BEST protect a person from the damaging effects of windchill on a severe day?

Light travels so fast that one can see an event at about the same time that it happens, such as turning on the light. When one sees lightning, it can be assumed that it happened at the same instant it was seen. Sound, on the other hand, travels more slowly. The sound of thunder takes 5 seconds to travel about 1 mile.
Based on the data,

which conclusion is correct?

A scientist uses a laboratory mouse to complete an experiment involving a maze. During each trial, the mouse runs through the maze, and the scientist counts the number of errors that the mouse makes before it reaches the end of the maze. The mouse goes through the maze a total of six times. The scientist's data are shown in the table at the left.

Based on the information and graph, which statement is the best interpretation?