Ch. 1Sec. 1 The Air

Around You

weatherweather•condition of Earth’s atmosphere @ particular time & place

atmosphereatmosphere• envelope of gases that

surrounds Earth

• makes conditions on Earth suitable for living things

atmosphereatmosphere• provides warmth & liquid

H2O• prevents Earth’s surface

from being hit by most meteoroids (rocks from outer space)

YouTube video-Bill Nye Atmosphere song

• The atmosphere is constantly changing, with gases moving in and out of living things, the land, and the water.

atmosphere made up

of:

Nitrogen-

78%

Oxygen-21%

Carbondioxide

Water vapor

Other gases &

particles (dust,

smoke, salt, other

chemicals

oxygenoxygen

• used in burning & rusting

ozoneozoneform of oxygenthat has 3oxygen atomsinstead of theusual 2

trace gasestrace gases• remaining 1% of gases• small amounts of them are

present

carbon dioxidecarbon dioxide• produced by animals & when

fuels are burned

water vaporwater vapor• water in the form of a gas

• invisible

• makes clouds

Review

time

trace gasestrace gases• remaining 1% of gases• small amounts of them are

present

oxygenoxygen

• used in burning & rusting

carbon dioxidecarbon dioxide• produced by animals & when

fuels are burned

ozoneozoneform of oxygenthat has 3oxygen atomsinstead of theusual 2

atmosphereatmosphere• provides warmth & liquid

H2O• prevents Earth’s surface

from being hit by most meteoroids (rocks from outer space)

YouTube video-Bill Nye Atmosphere song

weatherweather•condition of Earth’s atmosphere @ particular time & place

atmosphereatmosphere• envelope of gases that

surrounds Earth

• makes conditions on Earth suitable for living things