1. Water!

2. Why is water important? All living things depend on it.
60% of human body depends on it.
Helps transport in the body.
Regulates body temperature.
Photosynthesis in plants.
Light+CO2+H2O→C6H12O22+O

3. Specific Heat
High specific heat causes large bodies of water to heat up and cool down slowly.
Stable temperature for aquatic organisms

4. Water on Earth
Water in the air controls the rate at which air temperature changes.
70% of earth’s surface is water, 3% is fresh water (glaciers, snow, rain), and 1% is lakes, rivers, swamps, and atmosphere.
Where is the rest of the water?
hydrosphere- all water on, below, and in the earth’s atmosphere.
Ground water- water below the surface
Water in atmosphere is water vapor, clouds, ice crystals, and snow.

5. Water changes states
Evaporation- the process of a liquid changing to a gas at the surface of a liquid.
Condensation- process of a gas changing to a liquid.
The water cycle- process in which water continually moves throughout the hydrosphere.
Sun and gravity drive the water cycle.
Transpiration- evaporation of water from plants (gets water from the ground then released it through the leaves)
Runoff- water that runs downhill
Ground water- water in the ground
Reservoir- storage area for water

6. The Water Cycle

7. Water Cycle 1