| A | B |
|---|
| water vapor | water changing from a liquid to a gas |
| molecules | the smallest particles of water |
| mixture | two or more substances that combine and keep their own properties |
| oceans | where most water evaporates from |
| droplets | form when air is cooled and water molecules move more slowly |
| ice | floats because water molecules move farther apart than in liquid form |
| pollution | caused by harmful waste and chemicals |
| evaporation | caused by heating water |
| solutions | all the molecules of the dissolved substance spread out evenly |
| solid | what water becomems when the temperature decreases |
| dams | produce electricity using the energy of water |
| smog | a mixture |
| surface tension | the force holding water molecules together at the top to form a kind of skin |
| 3% | amount of water that is fresh water |
| water cycle | water moving throught the atmosphere, hydrosphere, and lithosphere |
