Layers of the Atmosphere 1 1.4ppt Layers of the Atmosphere W&C Chapter 1.4 Pages 31-36

How are the layers classified? The four main layers of the Atmosphere are classified according to changes in: Additional Info

A. Troposphere Tropo = changing conditions We live in this layer Where weather occurs Thinnest Layer (10km), contains most of the mass of the atmosphere Clouds form in this layer.

B. Stratosphere Strato = layered, spread out Has the Ozone Layer (O3) Absorbs UV radiation, heating up this layer and making it warmer higher up.

The Stratoposhere… A Is where weather occurs B Absorbs UV radiation C Is where we live D Burns up meteors

C. Mesosphere Meso = Middle Coldest layer at -90˚C Burns up Meteoroids you see as a shooting star.

D. Thermosphere (Divided into 2 layers) 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? Molecules have a lot of energy, but are so far apart that you would only rarely bump into them

D1. Ionosphere Ions = charged particles Causes the Aurora Borealis (Northern Lights) Bounce radio communications off this layer.

D2. Exosphere Exo = “outer” Outermost layer of the thermosphere Satellites orbit here.

The layer where weather occurs is the… Troposphere B Mesosphere C Thermosphere D Exosphere

The layer where satellites orbit is the… Ionosphere B Mesosphere C Thermosphere D Exosphere

Scaling the Atmosphere Convert miles to km Convert km to cm Divide by 200,000 to get your scale cm Create your scale model by following steps 4-7 on the scaling the atmosphere sheet.

Exit Pass List 3 of the layers of Earth’s atmosphere. Describe why 2 of them are important.

What to Work On DUE: Wednesday, May 16th Read Section 1.4 (pages 31-36) Answer the Section Review questions (#’s 1-4) on page 36 DUE: Wednesday, May 16th