Chemical changes involve the breaking and making of chemical bonds.

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Is laundry detergent an acid or a base?

Consider the story you just read. all but one of the choices below indicate that something is living.