An atom that loses or gains electrons and ends up being positively or negatively charged is called

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

Which type of pollution occurs when small particles of soil are suspended in water? a. radiological pollution b. chemical pollution c. physical pollution d. thermal pollution apex

Atype of organism that no longer exist on earth is said to be