Remember the activity we did earlier this week Any comments Or reflections What is the fire triangle What is in the air that fire needs to burn Oxygen Living things also need oxygen we love oxygen ID: 777933
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Slide1
The Air Around You
Slide2How long will the candle burn?
Remember the activity we did earlier this week?Any comments? Or reflections?
Slide3What is the fire triangle?
What is in the air that fire needs to burn?
Oxygen!!!
Living things also need oxygen, we love oxygen.
Fuel,
Heat, and
Air
Slide4Weather
is the condition of Earth’s atmosphere at a particular
time and place
.
Slide5A question for you…What would conditions on Earth be
like without the atmosphere?
Fill in your guess on your
note page
Slide6Some Possible Answers Include:(did you mention any of these
?)
What would conditions on Earth be
like without the atmosphere?
Water could not exist as a liquid on Earth’s surface.
Earth would be exposed to meteoroids and dangerous radiation from the sun.
There would be no life on Earth without the oxygen and other gases that living things need.
Slide7The Atmosphere
Earth's atmosphere is the layer of
gases
that
surrounds
the planet.
Slide8The Atmosphere – Living Things
Earth’s atmosphere makes conditions on Earth suitable for
living things
.
Slide9Composition of the Atmosphere
Atmosphere is made up of different kinds of gases necessary for living things.
Such as nitrogen, oxygen, carbon dioxide, water vapor, and other gases, as well as
particles of liquids and solids
.
Slide10Nitrogen
Nitrogen is the most
abundant
gas in the atmosphere.
Nitrogen is essential to living things.
Organisms must have nitrogen in order to
grow and to repair body cells
.
Slide11Oxygen
Oxygen is the
second
most abundant gas in the atmosphere.
Plants and animals take
oxygen
directly from the air and use it to release energy from food in a usable form.
Slide12Carbon Dioxide (CO2)
It is present in the air in small amountsIt is essential to all life. It is given off by animals as a waste product.
Plants must have CO
2
to produce food.
Burning fuels such as coal and gasoline, releases CO
2
in the atmosphere which could be raising Earth’s temperature.
Slide13Carbon Dioxide
Even though the atmosphere contains only a
small
amount of carbon dioxide, it is essential to life.
Plants must have carbon dioxide to produce food
.
When fuels such as
coal and gasoline
are burned, they release
carbon dioxide.
Burning
these fuels increases the amount of carbon dioxide in the atmosphere.
Rising carbon dioxide levels may be raising Earth's
temperature
. (Global warming?)
Slide14A question for you…How would the amount of carbon dioxide and oxygen in the atmosphere change if there were no plants? If there were no animals?
Fill
in your guess on your
note page
Slide15Some Possible Answers Include:(did you mention any of these
?)
How would the amount of carbon dioxide and oxygen in the atmosphere change if there were no plants? If there were no animals?
Without plants there would be less oxygen and more carbon dioxide.
Without animals there would be less carbon dioxide and more oxygen.
Slide16Water Vapor
Air is not
dry
because it contains
water vapor.
Water vapor is water in the
form of a gas
.
The amount of water vapor in the air varies greatly from
place to place
and from
time to time
.
Water vapor plays an important role in
Earth's weather
.
Clouds
form when water vapor condenses
.
Slide17ParticlesAir also contains tiny solid and liquid particles of dust, smoke, salt, and other chemicals.
Sometimes you can see the particles but most of them are too small to see
.
Play this interactive game
http
://
www.bbc.co.uk/schools/gcsebitesize/science/aqa/earth/earthsatmosphereact.shtml