Welcome To ClassWhy is a person working out and

sweats a lot more likely to get heat stroke when the humidity is high?

Agenda• Clouds notes• Demo• Cloud Classification

– Foldable Activity• Observe Clouds• Concept Map

Clouds• What is a cloud?

– Small water droplets or ice crystals suspended in the air

– Air is cooled and water vapor condenses

Clouds

How do clouds form?

• Water vapor condenses on condensation nuclei– Solid particle in the atmosphere that provides a

surface for water to condense– Ice, salt, dust, other particle

Cloud Formation

• Adiabatic Cooling –air mass temp. decreases as the air mass rises and expands

• Mixing – two masses of moist air meet and cool

Cloud Formation

• Lifting – forced upward movement of air that expands and cools

• Advective Cooling – air mass temp. decreases as the air mass moves over a cold surface

Types of Clouds

• Low Level – Stratus, nimbostratus, stratocumulus, some Cumulus

• Mid-level – Cumulus, altocumulus, altostratus

• High Level – Cirrus, Cirrostratus, Cirrocumulus

Key Cloud Terms• Nimbo, Nimbus – rain

• Alto – middle

• Stratus – layered

• Cumulus – cotton ball, fluffy look, heap

• Cirrus – feathery, curl of hair

Other Clouds

• Contrails – formed from exhaust from a jet

• Mammatus - pouch-like cloud structures and a rare example of clouds in sinking air– Seen after a storm

• Pileus Clouds – clouds found attached to a mountain top

Foldable Activity• Fold Paper in half

• Cut two lines (create 3 tabs)

• Label the tabs as Cumulus, Stratus, and Cirrus

• On the inside write information about each type of cloud

Cloud Observation• Keep a log of Clouds

Day Cloud(s) seen

Percent Sky Cover

Explaination

Stratus Clouds

Cumulus Clouds

Cirrus Clouds

Concept Map

• Fill in the concept map with the correct terms

• Use the book, notes, teacher