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6 questions
The atmosphere is divided into__________
5 layers
6 layers
3 layers
none of the above
tick on any 3 uses of atmosphere
inhalation
burning
cooking
eating
photosynthesis
neon is a gas used to make glowing-
signs
signboards
bulbs
tubes
the process in which the heavier insoluble impurities settle down is called-
decantation
filtration
distillation
sedimentation
nitrogen is needed for burning
TRUE
FALSE
the 4th layer of the earth's atmosphere
troposphere
exosphere
thermosphere
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