Transcript Chapter 2 Section 1 pages 36-43

Water in the Air
Chapter 2 Section 1
pages 36-43
~Focus points~
weather water cycle
3 forms of water
humidity
evaporation
condensation
dew point
cloud
precipitation
Weather
 The
condition of the
atmosphere at a
particular time and
place.
~Water Cycle~

H2O
Continuous
movement of water
from water sources
into the atmosphere,
and back onto/into
ground and back to
water sources.
Clouds
Condensation
Solar
Precipitation
Evaporation
Transpiration
Run off
Ground Water
Water Cycle
3 Forms/States of Water
1. Solid~~~~~~~~~~~~~
2. Liquid~~~~~~~~~~~~
3. 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
Water
vapor
process where plants
release water vapor into
the air through their
leaves.
Condensation


Process of water vapor (gas)
becomes a liquid.
This happens during 100% relative
humidity when air cools.
Example: shower mirror moisture
Dew Point


Air around the
glass cooling
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.
Cloud
• Collection of million water droplets
or ice crystals
•Forms as warm air rises
•3 Types
1. Cummulus
2. Stratus
3. Cirrus
Precipitation
Water
that falls from the atmosphere
to the Earth
 4 types
1. rain - liquid water
2. snow - frozen water
3. sleet - freezing rain (winter)
4. hail - balls of ice (spring/summer)
Word Bank for Diagram
Solar energy
Precipitation
Lake/water source
Run off
Evaporation
Transpiration
Infiltration
Condensation
Cloud
Ground Water
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 Source
2. Point Source
1. Non Point Source
~~~~~~~~
 Known
as polluted run off
 Cannot
be traced back to source
 From
scattered sources
 Leading
 We
cause of US water pollution
are the solution
Non Point Source
examples

Excess fertilizers, insecticides..

Oil, grease and toxic chemicals

Bacteria from livestock, pets…
2. Point Source Pollution
~~~~~~~~~~~~~
Pollutants that can be traced
to a source.
Examples:
Factories discharge pipe
Sewage ditch