The meteorologist says that it is snowing outside. The weather characteristic being described is . A. Air pressure B. Humidity C. Precipitation D. Temperature

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

Which of the following terms describes the layers of air surrounding the earth ?

According to the population pyramid, in 2000 china had about 120 million people in which age-group