As methane burns, it reacts with oxygen and forms carbon dioxide and water. The balanced chemical equation below models this chemical reaction.

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves

Helium decays to form lithium. which equation correctly describes this decay?

What would happen to a volleyball left outside in the winter? o o o o a. it would expand. b. it would lose air. c. it would shrink. d. it would explode.