ap phs

science test

matter

anything that has mass and takes up space (has volume)

atom

the smallest chemical unit of an element

element

A pure substance that cannot be broken down into a simpler substance and contains only one type of atom

compound

A pure substance that contains two or more elements chemically joined in a fixed proportion

molecule

The smallest unit of a chemical compound composed of two or more atoms bonded together

solution

an evenly distributed mixture made by dissolving one substance in another

salute

The substance in a solution that gets dissolved

solvent

The substance in a solution which the salute dissolves

solid

The state of matter in which a substance has a definite shape and a definite volume

liquid

The state of matter in which a substance has a definite volume

gas

The state of matter in which a substance has neither a definite shape nor a definite volume

density

The ratio of a substance’s mass to its volume defined by the equation

kinetic energy

The energy an object has due to its motion