Matching Pairs Earth's Water Vocabulary MatchOnline version Match the words from our book Earth's Water. by Beth Prather 1 gas 2 precipitation 3 solid 4 polluted 5 condensation 6 evaporation 7 invisable 8 liquid 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. matter that can freely change shape and size; often it can't be seen. able to flow and change shape while keeping its size. water that falls to the ground such as, hail, sleet, rain or snow having a firm or hard form or shape made dirty or harmful unable to be seen