Water Cycle Notes Entry 19 10/23/18 Key Points: The Water Cycle Evaporation Condensation Precipitation Transpiration Runoff

1. The Water Cycle

1. The Water Cycle A. The water cycle is made up of the Earth’s limited supply of water. 1. The water keeps going around and around in a cycle, which is referred to as the "Water Cycle.” 2. The water cycle is important because it gives us fresh water. 3. Water changes into different states: solid, liquid, gas

1. The Water Cycle B. The Water Cycle is made up of five main parts: 1. evaporation 2. condensation 3. precipitation 4. Transpiration 5. Runoff

2. Evaporation Water changes from a liquid to a gas (water  water vapor) Evaporation occurs when the sun heats up water in rivers, lakes or oceans, and turns it into vapor or steam. 

2. Evaporation C. The water vapor or steam leaves the river, lake or ocean and goes up into the air.

3. Condensation A. Water changes from a gas to a liquid (water vapor  rain cloud). B. Condensation occurs when water vapor in the air gets cold and changes back into liquid, forming clouds. C. Water vapor, from evaporation, condenses into water droplets that form clouds. Example: the droplets that form on the outside of a cold glass

4. Precipitation A. Precipitation occurs when so much water has condensed that it becomes too heavy to float in the air as a cloud. B._The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow.

5. Transpiration A. Transpiration is the process by which water evaporates from the leaves of plants. B. Plants lose water during transpiration.

5. Transpiration

6. Run Off A. Runoff is the movement of land-water to the oceans. This movement occurs mainly in the form of rivers, lakes, and streams.

6. Run Off B. Runoff consists of precipitation that did not evaporate, transpire nor penetrate the surface to become groundwater. C. Too much runoff can lead to flooding, which occurs when there is too much precipitation.