Warm Up

How long can a human survive without:

a) Air?b) Water?c) Food?

Rule of 3Air- 3 minutesWater- 3 daysFood- 3 weeks

Which of these 3 would be considered the most precious resource?

All gases that surround Earth’s surface

The Atmosphere

What is the atmosphere?All of the gases that surround EarthCreate an insulating “blanket” around the

planet that keep the temperature within a constant range

Has changed composition throughout Earth’s history- even now

What gasses are in the atmosphere?

78%

21%

1%

Nitrogen

Oxygen

Other

Nitrogen 78%Oxygen 21%Other 1%

Other includes Argon, Carbon Dioxide, Methane, Ozone, and Water Vapor

The atmosphere also contains solids – called “aerosols”

Where is the Ozone layer and what does it do?

Ozone layer is in the stratosphere

The ozone layer absorbs UV radiation from the Sun.

UV radiation is part of the electromagnetic spectrum.

Exposure to UV radiation can lead to skin cancer

Heat Transfer

How does the atmosphere keep us warm?

What are greenhouse gasses?Any gas that can absorb outgoing radiation from earth and radiate it back toward the surface of the planet

Includes Carbon Dioxide, Nitrous Oxide, Water Vapor, and Methane

Keeps Earth’s average temperature @ 55°F

Why is the atmosphere important for life on Earth?Provides necessary gases for life

CO2 – photosynthesis, greenhouse gas

O2 – Cellular respirationProtection from harmful radiation,

meteorsWarmth- keeps Earth habitable

through the greenhouse effect

Atmosphere Stations- 20 min/stn

1- Layers Foldable2- Heat Transfer Demos

Use text and online sources to create your own foldable in your journal

computers are OK for research if needed

Radiation, Conduction, Convection

2 set-ups:Heat Lamp and

ThermometerConfetti – Beaker – Hot

plateDiagram and Labels

with explanations of where and how heat is being transferred