Why does ice float after it crystallizes? its mass is greater than water. its density is greater than water. its density is less than water. air trapped in ice causes it to float.

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

When a scientific theory has been tested and proved by the scientific community, it becomes a law