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1.
how is a rock different from a mineral?
a. it is not different, they are the same things and the words "rock" and "mineral" can be used interchangeably
b. a rock is made up of minerals
c. minerals are made up of rock pieces
d. minerals are man-made and rocks occur naturally

2.
what are the three main types of rocks? select all that apply
a. metamorphic
b. chemical
c. sedimentary
d. igneous
e. magmatic
f. biogenous