Composition of the Atmosphere Composition what something is made of Air is all around us and it behaves often like a liquid it flows moves and causes things to happen weather ID: 759165
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Slide1
Composition of the atmosphere
Slide2Composition of the Atmosphere
Composition = what something is made of.
“
Air”
is all around us and it behaves often like a liquid- it
flows, moves, and causes things to happen (weather!)
Air =
mixture of dozens of types of gases
.
Slide3Air has MASS
!! This means it can exert a FORCE (push) on you!The air that surrounds the planet is held in place by gravity and is called our atmosphere.Gravity becomes less and less as you move away from Earth.As a result, there are fewer and fewer molecules as you move away from the surface.
Slide4Air!!!
The air around us is 78%:
NITROGEN
21% of the air around us is:
OXYGEN
The remaining
1%
is a mixture of all other gases:
Carbon dioxide, helium, argon
, neon, hydrogen…
Slide5Slide6Water Vapor
Water is present in gas form in the air we breathe. We call this water va
por.
The amount of water vapor in the air is called “hum
idity” and varies greatly with time and location.
Water vapor is an important part of the water cycle and is a driving force in most types of weather.
Slide7POP QUIZ
1. ________ is a mixture of gases.
2. ________ is a blanket of gases that surrounds a planet.
3. 78% of our atmosphere on Earth is made of what gas?
4. 21% of our atmosphere on Earth is made of what gas?
5. Humidity refers to the amount of water __________ in the air.