Transcript Water in the Atmosphere

Water in the Atmosphere
Key Terms to understand
The Water Cycle
• Evaporation • Condensation – process by which molecules of
water vapor in the air become liquid water
• Precipitation – Any form of water that falls
from clouds and reaches Earth’s surface.
The Water Cycle
Precipitation falls from the
clouds toward the
surface. The water then
runs off the surface
(moves through ground)
back into the oceans,
lakes and streams
How Do Clouds Form?
• All kinds of clouds form when water vapor in
the air becomes liquid water or ice crystals.
• Some of the water vapor in the air condenses
to form droplets of liquid water.
Dew Point – Temperature at which condensation
begins
Clouds form whenever air is cooled to its dew
point and particles are present.
How Do Clouds Form Experiment
• directions
Types of Clouds
Clouds are differentiated by Altitudes and
Shapes
Altitudes
High – Prefixed by cirro
20000-40000
Medium – Prefixed by alto 6500-20000
Low below 6500
Types of Clouds Cont.
Shapes
Cumulus – Heap, Pile
Stratus - Layer
Cirrus – wispy and thin, curl of hair
Nimbus – rainy cloud, likely to bring precipitation
Each type of cloud is associated with a different
type of weather
Cumulus Clouds
Usually a sign of fair weather
Cirrocumullus (high)
Altocumulus (med)
Cumulonimbus (low)
Cumulus
Stratus Clouds
Cirrostratus (high)
Altostratus(med)
Nimbrostratus (rainy)
Stratus (low)
Cirrus Clouds
Made up of mostly ice crystals
Means there could be an approaching storm\
High Alt. Cloud
Fog
• Clouds that form at or near the ground.
• Forms when the ground cools at night after a
warm, humid day
• The ground cools the air just above the
ground to the airs dew point
What Type of Cloud is it?
• ( include 3 main types and fod)
• How can you tell which is which? .. By shape
Precipitation
Any form of water that falls from clouds and
reaches Earth’s surface.
Types of Precipitation
• Rain –
Types of Precipitation
• Hail –
Types of Precipitation
• Freezing Rain –
Types of Precipitation
• Sleet –
Types of Precipitation
• Snow –