What causes the seasons to occur?
What causes the seasons to occur?
It has nothing to do with the Earth’s distance from the Sun
What causes the seasons to occur?
Remember, it’s all about the angle of light that changes as
the tilted Earth revolves around the Sun. Light becomes
more or less direct from season to season.
What causes the seasons to occur?
Look carefully at the Northern Hemisphere above and the
seasons that occur as it tilts toward (left), away (right) and
neither toward nor away (top and bottom) from the Sun.
During the year the Sun’s angle changes cyclically.
How does this affect the length of daylight in a
hemisphere?
During the year the Sun’s angle changes cyclically.
How does this affect the length of daylight in a
hemisphere?
On June 21st the summer solstice, the length of day is at its
maximum. On the winter solstice in December, the day is at
its smallest length. On the equinoxes in March and
September the length of daylight equals that of night time 12
hours. Notice as the angle increases so does the length of
daylight.
Use heat transfer to describe the formation of
global and local winds.
Sun
Earth
Use heat transfer to describe the formation of
global and local winds.
Sun
RADIATION
The Sun RADIATES energy to the earth where it is absorbed.
Earth
Use heat transfer to describe the formation of
global and local winds.
Sun
Radiation
Conduction
Earth
Air molecules get the heat energy CONDUCTED to them as the touch the warmed earth.
Use heat transfer to describe the formation of
global and local winds.
Sun
Convection
Radiation
Conduction
Earth
Warmed air CONVECTS its heat upward.
Use heat transfer to describe the formation of
global and local winds.
Spreads
Cools and
Falls
Sun
Convection
Cycle
Convection
Air is
leaving
Radiation
Returns
Conduction
Earth
A CONVECTION CYCLE forms as the risen air spreads sideways, cools, falls and returns.
Use heat transfer to describe the formation of
global and local winds.
Sun
Radiation
High
Pressure
Low
Pressure
Earth
WIND forms as air flows from areas of high pressure to low pressure.
Use heat transfer to describe the formation of
global and local winds.
Sun
Radiation
High
Pressure
WIND
Low
Pressure
Earth
WIND forms as air flows from areas of high pressure to low pressure.
Use heat transfer
to describe the
formation of
global and local
winds.
How does heat
transfer’s making
of wind relate to
land and sea
breezes?
Use heat transfer
to describe the
formation of
global and local
winds.
How does heat
transfer’s making
of wind relate
the formation of
global winds?
Explain the difference between weather and
climate.
Explain the difference between weather and
climate.
Weather
the state of the
atmosphere at a
place and time as
regards heat,
dryness,
sunshine, wind,
rain, etc
Climate
Atmospheric
conditions
the weather
conditions
prevailing in an
area in general or
over a long period.
"our cold, wet
climate"
Which of these
diagrams refers to
weather and which
to climate?
Diagram A
Explain the
difference between
weather and
climate.
Why is this so?
Diagram B
Sleet, Hail, Warm, Rain, Tornadoes,
Hurricanes, Cold, Hot, Snow
I recognize how the following factors affect climate:
earth’s tilt, latitude, proximity to water, global wind
patterns, and altitude, and ocean currents.
Let’s see what you can remember and make sense of
here.
The Earth is titled at a _____ degree angle.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
The Earth is titled at a 23 degree angle.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Parts of the Earth tilted toward the Sun receive
__________ direct light and so the climate is
generally __________ there.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Parts of the Earth tilted toward the Sun receive
more direct light and so the climate is generally
warmer there.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Latitude effect climate. At the equator, the rays
from the Sun strike ____ directly. As one moves
away from the equator, the directness of light
_____ and so the climate is ______.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Latitude effect climate. At the equator, the rays
from the Sun strike more directly. As one moves
away from the equator, the directness of light
decreases and so the climate is cooler.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Bodies of water effect climate. Areas close to
shorelines generally have less _______ in
temperature than areas away from the ocean or
other large bodies of water. These areas are also
more __________.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Bodies of water effect climate. Areas close to
shorelines generally have less extremes in
temperature than areas away from the ocean or
other large bodies of water. These areas are also
more humid.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Global winds push around air masses (bodies of
air with characteristic qualities) bringing air that
can be combinations of _____, _____, _____ or
______to various regions.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Global winds push around air masses (bodies of
air with characteristic qualities) bringing air that
can be combinations of dry, humid, warm or cool
to various regions.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Altitude is the height above sea level. Areas
higher in the atmosphere have _______ climates.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Altitude is the height above sea level. Areas
higher in the atmosphere have cooler climates.
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Ocean currents carry _______ or _______waters
to various areas. This can warm up or cool down
areas and also effect the humidity as well. How
do you think it effects the humidity?
I recognize how the following factors affect
climate: earth’s tilt, latitude, proximity to water,
global wind patterns, and altitude, and ocean
currents.
Ocean currents carry cool or warm waters to
various areas. This can warm up or cool down
areas and also effect the humidity as well. How
do you think it effects the humidity?
Greenhouse Gases are a small percentage of the
atmosphere but have a big impact on global
temperatures. Consider this:
Greenhouse Gases are a small percentage of the
atmosphere but have a big impact on global
temperatures. And this:
Greenhouse Gases are a small percentage of the
atmosphere but have a big impact on global
temperatures.
What happens to the temperature as the C02 rises and falls?
Explain the positive and negative impact that the
greenhouse effect has on life on Earth.
Remember the greenhouse effect? Here’s a diagram to
jog your memory.
Explain the positive and negative impact that the
greenhouse effect has on life on Earth.
So the positive impact is that it provides enough warmth
so that life can exist . . . Right?
Explain the positive and negative impact that the
greenhouse effect has on life on Earth.
What’ could possibly be the negative impact?
Explain the positive and negative impact that the greenhouse
effect has on life on Earth.
You got it! When there’s too much of the greenhouse gases,
global warming begins and climate change can occur.
What are human and natural causes for the
accelerated rise of global temperatures?
If you remember the CO2 and Temperature graph,
the fluctuations go way back before human
influence. What do you suppose caused those
peaks in greenhouse gases and the associated
temperature? This weather portion of the MCAS
review ends with an article on this topic.
Click here to read about natural causes and here
to read about human causes.
What are human and natural causes for the
accelerated rise of global temperatures?
Can you answer this now? Talk about it with
your classmates.
Human Causes
Natural Causes