2. WEATHER
The condition of the
atmosphere at any
given place and time is
called weather.
The atmosphere is a
mixture of gases, and it
protects Earth from the
sun’s ultraviolet rays.
Many factors, including
air
temperature, humidity,
and pressure help us
describe the weather.
3. TEMPERATURE
Air temperature is
how warm or cold
the air is around us.
The temperature
also affects how
much moisture there
is in the air.
We decide what to
wear and what to do
outside based on the
air temperature.
4. HUMIDIT Y
Humidity is how much
water vapor is in the
air.
Low humidity is when
the air feels dry.
High humidity is when
the air feels damp.
Another weather
factor is affected by
humidity. This factor
is known as
“precipitation.”
5. AIR PRESSURE
Air pressure is the
weight of the
atmosphere pressing
down on Earth’s
surface.
Temperature and
humidity both affect
air pressure.
Changes in air
pressure usually bring
changes in the
weather.
