Layers of theLayers of theW&C Chapter 1.4

Pages 31-36W&C Chapter 1.4

Pages 31-36

AtmosphereAtmosphere

At1

1.4ppt

The four mainlayers of theAtmosphereare classifiedaccording tochanges in:

Additional Info

How are the layers classified?

A. Troposphere

Tropo = changing conditions1. We live in this layer

2. Where weather occurs

3. Thinnest Layer (10km), contains most of the mass of the atmosphere

4. Clouds form in this layer.

Strato = layered, spread out• Has the Ozone Layer (O3)• Absorbs UV radiation,

heating up this layer and making it warmer higher up.

B. Stratosphere

The Stratoposhere…

A

•Is where weather occurs

B

•Absorbs UV radiation

C

•Is where we live

D

•Burns up meteors

Meso = Middle• Coldest layer at -90˚C• Burns up Meteoroids

you see as a shooting star.

C. Mesosphere

Thermo = Heat

• Molecules are spread very far apart

• No Outer Limit• N2 & O2 molecules

absorb heat, raising their temperature to 1,800°C– You would still feel cold

here. Why?

D. Thermosphere (Divided into 2 layers)

Ions = charged particles

• Causes the Aurora Borealis (Northern Lights)

• Bounce radio communications off this layer.

D1. Ionosphere

Exo = “outer”• Outermost layer of

the thermosphere• Satellites orbit here.

D2. Exosphere

The layer where weather occurs is the…

A

•Troposphere

B

•Mesosphere

C

•Thermosphere

D

•Exosphere

The layer where satellites orbit is the…

A

•Ionosphere

B

•Mesosphere

C

•Thermosphere

D

•Exosphere

Exit Pass

• List 3 of the layers of Earth’s atmosphere.• Describe why 2 of them are

important.

What to Work On• Read Section 1.4 (pages 31-36)• Answer the Section Review questions (#’s 1-4)

on page 36

DUE: Wednesday, May 16th