Give reasons
a) Mountaineers carry oxygen cylinders while climbing
b) It is advised to breathe through nose and not through the mouth
Draw the composition of air and mention the percentage of each component.
How will you prove that air supports burning? Draw a diagram also.

How do plants and animals help each other in the exchange of gases in the atmosphere?
Classify the waste in to green bins and blue bins and state the reason for each:
plastic bottles, wooden ice-cream sticks, tin can, broken pieces of egg shell
Why we should not add waste containing milk products, vinegar, oil in the pit
meant for vermicomposting.



It has air and garbage in garbage out
List three ways to deal with garbage. What are the three R?s which should be followed
to minimize garbage produced by us.

Dear Student,

The solutions to your a and b queries have been provided below:
a. At the higher altitude, the air pressure decreases, and oxygen cylinders are needed to maintain the normal partial pressure of the oxygen needed for respiration.

b. It is advised because the nose has physical barriers such as mucus and hairs to entrap the harmful particles and microorganisms to enter the body. It also changes the temperature and humidity of the air we are taking.

For remaining queries, we request you to post them in separate threads to have rapid assistance from our experts.

Regards,

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