The process by which rocks are broken down into smaller fragments by the atmosphere and other factors in the environment is called a. erosion. b. sorting. c. wind. d. glaciation. e. weathering.

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

Which is a possible result of higher air temperatures caused by global warming? a. increase in sea level b. freezing of polar ice caps c. rapid evaporation of water in the soil d. flooding of low-lying coastal areas

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?