Chapter 2 Section 1pages 36-43

~Focus points~weather water cycle 3 forms of water humidity evaporation condensation dew point cloud precipitation

Water in the Air

Weather

The condition of the atmosphere at a particular time and place.

H2O

Continuous movement of water from water sources into the atmosphere, and back onto/into ground and back to water sources.

~Water Cycle~

Precipitation

Transpiration

Evaporation

Ground Water

Run off

Condensation

Solar

Water Cycle

Clouds

3 Forms/States of Water

1.

2.

3.

Solid~~~~~~~~~~~~~

Liquid~~~~~~~~~~~~

Gas~~~~~~~~~~~~~~~~~~~

Humidity & Relative Humidity

Humidity: Amount of water vapor or moisture in the air.

Relative Humidity (%): amount of moisture the air contains compared to amount it can hold.

Evaporation

Liquid changing into water vapor (gas).

Rising into atmosphere.

Example- wet-to-dry chalkboard

Transpiration

The process where plants release water vapor into the air through their leaves.

Water vapor

Condensation

Process of water vapor (gas) becomes a liquid.

This happens during 100% relative humidity when air cools.

Example: shower mirror moisture

Dew Point

Temperature that the air must cool to, to be completely saturated.

Ex: Ice in a glass cools the surrounding air. The glass gives the water vapor a surface to condense on.

Air around the glass cooling

Cloud

•3 Types1. Cummulus2. Stratus3. Cirrus

• Collection of million water droplets or ice crystals

•Forms as warm air rises

Precipitation

4 types

Water that falls from the atmosphere to the Earth

1. rain - liquid water2. snow - frozen water

3. sleet - freezing rain (winter)

4. hail - balls of ice (spring/summer)

Word Bank for Diagram

Solar energy InfiltrationPrecipitation CondensationLake/water source CloudRun off Ground WaterEvaporationTranspiration

Stop here…

What is a water shed??

Land area where water run off (rain and snow) drains into a marsh, stream, lake, reservoir, or ground water.

Water quality is a reflection of land uses of a particular water shed area.

What is Run Off?

?Pollution?

Negative effect on our environment Different forms (air, water…)

2 types of water pollution

1. Non Point Source2. Point Source

1. Non Point Source~~~~~~~~

Cannot be traced back to source

Known as polluted run off

From scattered sources

We are the solution

Leading cause of US water pollution

Non Point Source examples

Oil, grease and toxic chemicals

Excess fertilizers, insecticides..

Bacteria from livestock, pets…

2. Point Source Pollution~~~~~~~~~~~~~

Pollutants that can be traced to a source.

Examples:

Sewage ditch

Factories discharge pipe