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