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OCR: LIQUIDS LIQUID is a substance that moves more freely than solid, but not as freely gas The tiny particles that make up liquids have more energy than those solids. but not much as those of gases Liquids also differ from gases because they cannot be compressed into smaller spaces The ability ofa liquid to resist flowing is called its viscosity. Thick liquids, like syrup have high viscosity and flow slowly, whereas thin, runny liquids like water have - low viscosity Tropical waterfalls The Iguacii Falls, on the Argentina Brazil border, flow fast, a maximum rate 0 450 000 feet (12, 750 cu m per second. SUREACE ALSO TENSION Iguacui SURFOCE