3. Weather
the state of the atmosphere at a place
and time as regards heat, dryness,
sunshine, wind, rain, etc.
4. Measuring pressure
The atmosphere around us presses on
the surfaces of the Earth as well as all
the things on the Earth.
The pressure exerted by the
atmosphere on the surface of the Earth
is known as atmospheric pressure.
7. The atmospheric pressure
is the highest at the sea
level.
This is because all the air
above the sea presses on
the sea surfaces.
There is less air pressing on
the top of mountains than on
the sea level.
Hence, the atmospheric
pressure is lower on higher
grounds.