What does the law of conservation of matter state? a Matter can be created, destroyed, and changed.
b Matter can be destroyed and created, but not changed.
c Matter can be changed, but not created or destroyed.
d Matter can be created and changed, but not destroyed.

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?

Why does ammonia, nh3, behave as a base when it reacts with an acid? z