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
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