The diagram above represents the photoelectric effect for a metal.

Of the 168 hours in a week as a full time student you should spend how many hours per week on school work?

The and the gall bladder work together to produce, store, and use bile to digest a) liver; fats b) stomach; fats c) appendix; food. d) pancreas; sugars

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide