List all the types of energy

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?