The type of gas needed by living things such as animals to stay alive.
oxygen
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15
The _________ in the nostrils remove dust from the air we breathe in.
hairs
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15
__________________ is the process by which air enters and leaves our body.
Breathing
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boom
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magnet
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rocket
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lifesaver
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15
3 main parts of our respiratory system
nose, windpipe and lungs
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seesaw
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gold
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fairy
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banana
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15
The carbon dioxide given out by the animals is used up by the ____________.
plants
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15
In the lungs, the air tubes branch into tiny tubes that end in air sacs. The air sacs are surrounded by blood vessels. What important process takes place in the air sacs?
gas exchange
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15
Plants make food by _______________.
photosynthesis
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boom
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gift
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shark
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banana
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15
How do mammals like dolphins and whales breathe?
blowholes
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thief
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gold
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fairy
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thief
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25
What is air made up of?
nitrogen, oxygen, carbon dioxide, water vapour and other gases.
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15
How do worms breathe?
moist skin
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15
True or False: Plants can make food when there is no light.
false
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15
It is the most abundant type of gas in the air. About 78% of air is made up of it.