ChapD1.1

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Information about ChapD1.1

Published on April 29, 2008

Author: stviator4b

Source: slideshare.net

Description

Earth's Atmosphere

Earth’s Atmosphere

The Air You Breathe atmosphere: the layer of air that surrounds our planet atmosphere looks like a thin blanket surrounding the entire planet formed when gases from erupting volcanoes collected around the planet millions of years ago gases would have poisoned people but bacteria and other living things used these gases and released new gases the gas mixture changed slowly over time until it became the atmosphere we have now

atmosphere: the layer of air that surrounds our planet

atmosphere looks like a thin blanket surrounding the entire planet

formed when gases from erupting volcanoes collected around the planet millions of years ago

gases would have poisoned people but bacteria and other living things used these gases and released new gases

the gas mixture changed slowly over time until it became the atmosphere we have now

atmosphere made of billions and billions of gas particles about 4/5 of these gas particles are nitrogen (N) 1/5 are oxygen (O) oxygen: a gas that your body uses in its life processes carbon dioxide (CO2) and water vapor make up the rest of the atmosphere plants use CO2 during photosynthesis plants give off O as photosynthesis occurs CO2 absorbs heat energy from the sun and Earth’s surface this helps keep the planet warm

atmosphere made of billions and billions of gas particles

about 4/5 of these gas particles are nitrogen (N)

1/5 are oxygen (O)

oxygen: a gas that your body uses in its life processes

carbon dioxide (CO2) and water vapor make up the rest of the atmosphere

plants use CO2 during photosynthesis

plants give off O as photosynthesis occurs

CO2 absorbs heat energy from the sun and Earth’s surface

this helps keep the planet warm

water vapor can absorb heat energy amount of water vapor in the air varies from place to place air over bodies of water have more water vapor high in the air water vapor changes to clouds

water vapor can absorb heat energy

amount of water vapor in the air varies from place to place

air over bodies of water have more water vapor

high in the air water vapor changes to clouds

properties of air takes up space has weight air pressure: all the particles if air pressing down on the surface changes as you go higher in the atmosphere at the surface particles are close - the further you to into the atmosphere the farther apart the particles are less air pressure the higher the atmosphere

properties of air

takes up space

has weight

air pressure: all the particles if air pressing down on the surface

changes as you go higher in the atmosphere

at the surface particles are close - the further you to into the atmosphere the farther apart the particles are

less air pressure the higher the atmosphere

Atmosphere Layers atmosphere divided into 4 layers troposphere: closest to Earth we live in the troposphere and breathe air almost all weather can happen here air temp goes down as you go up stratosphere: contains most of the atmosphere’s ozone, kind of O airplanes travel in the stratosphere to avoid bad weather ozone protects us from suns harmful rays temps increase w/ height

atmosphere divided into 4 layers

troposphere: closest to Earth

we live in the troposphere and breathe air

almost all weather can happen here

air temp goes down as you go up

stratosphere: contains most of the atmosphere’s ozone, kind of O

airplanes travel in the stratosphere to avoid bad weather

ozone protects us from suns harmful rays

temps increase w/ height

mesosphere temp decreases w/ height coldest layer thermosphere hot, outermost layer temp increases quickly w/ height can reach thousands of degrees Celsius

mesosphere

temp decreases w/ height

coldest layer

thermosphere

hot, outermost layer

temp increases quickly w/ height

can reach thousands of degrees Celsius

Summary thin blanket of air surrounding Earth is the atmosphere atmosphere divided into 4 layers based on temp changes starting with closest to Earth the layers are: troposphere, stratosphere, mesosphere, and thermosphere

thin blanket of air surrounding Earth is the atmosphere

atmosphere divided into 4 layers based on temp changes

starting with closest to Earth the layers are: troposphere, stratosphere, mesosphere, and thermosphere

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