2. What will you learn?
Earth’s rotation and revolution
Weather and climate
Causes of weather and climate
Climate and vegetation
3. Earth’s rotation and revolution
The earth rotates as it revolves around the sun.
Rotation is the motion of the earth as it spins on its
axis once every 24 hours.
The earth is tilted at a 23.5 angle. The earth’s
revolution around the sun affects the weather and
climate change. The earth’s tilt stays the same as
it revolves around the sun.
Solstice is used to describe the time during the year
when the sun reaches the farthest northern or southern
hemisphere in the sky.
In the Northern and southern Hemisphere the summer
day is longer than the night, but In the winter the day is
shorter than the night. In spring and autumn the day
and night are equal in length.
The earth’s revolution brings the temperature and
weather changes we call season to many parts of the
earth. But in some regions there is little change
6. Weather and climate
People often confuse weather and climate. The
difference between weather and climate is that the
weather is the condition of earth’s atmosphere at a
given time and place climate is the term for the typical
weather conditions of a certain region over a long
period of time.
7. Causes of weather and climate
Factors that interact to cause weather are solar energy,
wind, landforms, bodies of water, water vapor, cloud
cover and elevation. The most important weather factor
is the amount of energy. Clouds hold water vapor in the
atmosphere, water vapor determines whether there will
be precipitation. In elevation the temperature drops to
3.5 F for every 1000 foot increase. A places location and
latitude determine the weather in a region.
8. Climate Regions
To categorize climate regions, geographers divide the
earth into three general zones of latitude : tropical,
middle and high. These zones are found on both sides of
the equator. Tropical latitudes are found between the
equator and tropic of cancer and between the equator
and the tropic Capricorn where it is usually hot. Middle
latitudes extend from the tropic lines to the lines of the
Artic and Antarctic circles. High latitude refers to the
cold areas around the north and south poles.
9. Vegetation Regions
The term vegetation is used to describe an area that has
similar plants. A vegetation region is named for the
types of trees, grasslands and specially adapted plants.
The four basic types of vegetation are: forest, savanna,
grasslands and desert. Forests can be a either cold,
tropical or temperate. Savanna is a mix of grasslands
Which vegetation region do you think we are living in