1. The Water Cycle

2. Water never leaves the Earth
Water never leaves the Earth. It is constantly being cycled through the atmosphere, ocean, and land. This process, known as the water cycle, is driven by energy from the sun. The water cycle is crucial to the existence of life on our planet.

4. Water Cycle

5. During part of the water cycle, the sun heats up liquid water and changes it to a gas by the process of evaporation. Water that evaporates from Earth’s oceans, lakes, rivers, and moist soil rises up into the atmosphere.

7. The process of evaporation from plants is called transpiration
The process of evaporation from plants is called transpiration. Water flows from the plants roots and exits through the leaves. (In other words, it’s like plants sweating.)

8. infiltration

9. As water (in the form of gas) rises higher in the atmosphere, it starts to cool and become a liquid again. This process is called condensation. When a large amount of water vapor condenses, it results in the formation of clouds.

11. When the water in the clouds gets too heavy, the water falls back to the earth as snow or rain. This is called precipitation.

13. When rain falls on the land, some of the water gets into the soil
When rain falls on the land, some of the water gets into the soil. This is called infiltration. When soil gets saturated, it is absorbed into the ground forming pockets of water called groundwater. Most groundwater eventually returns to the ocean. Other precipitation runs directly into streams or rivers when the soil gets too full. This is called runoff.

16. Relationship between Temperature and Water Vapor
As temperatures increase the amount of water vapor in the atmosphere increases
Near the poles the amount of water vapor decreases because of the low temperatures
Warm air can hold more water vapor

17. What is Dew Point?
Dew Point: The temperature at which water vapor will start to condense out of the air as liquid water.

18. What is Relative Humidity?
The percentage of water vapor that is actually in the air compared to the maximum amount of water vapor the air can hold at a particular temperature

19. http://perso. orange. fr/prof