THINK
ZONE
Give reason-
- A layer of a gas present in the atmosphere protects us from the sun's
harmful ultraviolet rays. Can you name this gas?
- Air contains noble gases in very small amounts. What are noble gases? Can
you name any two noble gases?
• What happens when there is too much water vapour in the air? Explain
. What is filled in the cylinder which an astronaut or a diver carries with
him?​
it's chemistry