Title: Brianna Danelon,
1By
Brianna Danelon,
Arlene Waryszak,
and
Christina Sisti
2What is HUMIDITY?
- Humidity is the measure of the amount of water
vapour in the atmosphere. The more water vapour
there is in the atmosphere, the more humid it
becomes. It is what causes those sticky and
muggy days.
3What Causes HUMIDITY?
- Humidity is caused by evaporation and
condensation. Water evaporates into the
atmosphere, which is caused by solar radiation
being absorbed. In the atmosphere, water vapour
is converted back into liquid form when air
masses lose heat energy and cool. This is
responsible for most clouds and also produces
rain.
4Time of Year HUMIDITY Occurs...
- Humidity mostly occurs during the warm months
usually in the summer. It does not occur in the
winter because the cold air cannot hold as much
water vapour than warm air can.
5Where in the World is HUMIDITY?
?
- Humidity is found nearly everywhere in the
world. However, it occurs most often in areas
along and around the equator because the Suns
rays directly hit the equator. Also, humidity is
found near large bodies of water because of the
heat and moisture given off. Places such as the
North and South Pole are least likely to have
humidity.
?
?
6Is There HUMIDITY in Ontario?
- Yes there is. Nearly everyone who lives in
Ontario has experienced humidity. This is mainly
due to the Great Lakes. The Great Lakes generate
heat and moisture causing the humidity.
DID YOU KNOW Windsor is known to be the
humidity capital of Canada.
7HUMIDITY's Destruction
Humidity does not cause many environmental
problems, although when there is high humidity,
it may cause wood to expand making doors and
drawers hard to open.
Humidity causes many health problems, such as
dehydration, heat exhaustion, and in the extreme,
heat stroke and hypothermia. Humidity will also
cause arthritis to worsen.
8HUMIDITY's Destruction
A lack of humidity can also cause problems. It
can cause dryness in the membranes of the nose,
throat and bronchial tubes, respiratory
infections, repeated attacks of winter colds and
airborne infections.
9How Often HUMIDITY Occurs
Humidity occurs mostly in the summer because the
summer has the hottest weather, and warm air
holds more moisture. Also, humidity mostly
occurs near lakes and oceans because of the
moisture coming from the water. (i.e. the
Caribbean)
10Factors of Weather that Interact to Produce
HUMIDITY
Evaporation, condensation, and air temperature
interact to produce humidity
- Water evaporates into the atmosphere. When the
air is warm, the water vapour is easier to hold.
In the atmosphere, water vapour is made back into
water droplets when air masses lose heat energy
and cool.
11Definitions
Relative Humidity the amount of water in the
air relative to the saturation amount of air can
hold at a given temperature multiplied by
100 Absolute Humidity the percentage of water
vapor actually present in the air Dew point
the temperature at which water vapour saturates
from an air mass into liquid or solid usually
forming rain, snow, frost, or dew.
12Interesting Facts
- There is no such thing as "heat lightning".
So-called heat lightning is just lightning from a
thunderstorm too far away to be heard - Adding water vapor (humidity) to the air lowers
density, weight and pressure of the air - The temperature of the water molecules remains
the same while the molecules change state - Humidity is the main reasons for school
absentees - Humidity is the 1 reason for hospitalization of
children - Hair length increases with humidity.
13Thank you for listening to our presentation on
Humidity
The End