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