Ionic compounds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms. I hope this helps you out.
Paleontology, the study of fossils, supports evolution because the discovery of old life forms shows how new life evolved.
B. I think thats right :/
False. Mass doesn't change in relation to something's location, only weight does.