Relier Pairs Earth's Water Vocabulary MatchVersion en ligne Match the words from our book Earth's Water. par Beth Prather 1 gas 2 solid 3 polluted 4 liquid 5 invisable 6 condensation 7 precipitation 8 evaporation matter that can freely change shape and size; often it can't be seen. When liquid changes to a gas (i.e. boiling water changes to steam on the stove) water vapor (water in its gas form) turns into liquid. You may see this change on the outside of a cold glass cup, the warm side of windows, and in the clouds up in the air. made dirty or harmful water that falls to the ground such as, hail, sleet, rain or snow able to flow and change shape while keeping its size. having a firm or hard form or shape unable to be seen