8. In a chemical reaction, if the reactants are heated, the reaction usually happens a) Faster
b) Slower
c) At the same rate

Light waves can move through , but they travel fastest when they move through a(n) .

On the periodic table, elements are arranged by which of the following. a. mass numbers. b. increasing atomic number. c. alphabetical order. or d. density

Malia was able to make a paper clip float on the surface of water what will most likely happen to the paper clip if a drop of dishwashing detergent is added near it