solid — (noun) something that keeps its shape and doesn't flow easily · liquid — (noun) something that flows and takes the shape of its container · gas — (noun) something that spreads out to fill any container · ice — (noun) solid water, usually formed when water gets very cold · water — (noun) a clear liquid that we drink and find in rivers and seas · steam — (noun) water in its gas form, usually when it's hot

solid — (noun) something that keeps its shape and doesn't flow easily · liquid — (noun) something that flows and takes the shape of its container · gas — (noun) something that spreads out to fill any container · state — (noun) a form that matter can exist in, like solid, liquid, or gas · volume — (noun) the amount of space something takes up · particles — (noun) very tiny pieces that make up everything

kinetic energy — (noun) the energy an object has because it is moving · surface tension — (noun) the force that causes the surface of a liquid to contract · density — (noun) how much mass is in a certain volume · buoyant force — (noun) the upward force exerted by a fluid that opposes the weight · pressure — (noun) the force exerted per unit area · atmospheric — (adjective) relating to the earth's atmosphere