Sodium is a reactive metal. chlorine is a reactive gas. these two elements combine to form a a) stable compound called table salt. b) new element called sodium chloride. c) reactive compound that explodes in water. d) mixture that is easily separated by dissolving in water.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

All motion is caused by force? true or false

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?