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Understanding the Science of
Climate Change Calvert School
Sixth Grade Science
What Are Greenhouse Gases?
*Gases in our atmosphere that trap heat energy.
*Carbon dioxide, methane, nitrous oxide, ozone
*The most abundant and potent = Water Vapor!
*But the real questions is which greenhouse gases are natural and which are result of population growth and urbanization?
What about the Ozone Layer, Dude?
*Ozone is Oxygen 3, special gas that protects Earth from ultraviolet radiation.
*Although it is a greenhouse gas, it is not directly related Global Warming.
*Hole in ozone layer grew in 1970s as result of chlorofluorocarbons (CFCs) from fridges, aerosol, etc/.
*International laws eliminated CFCs and hole is now shrinking!
Greenhouse Effect?
*A natural effect that insulates Earth and keeps atmosphere warm
*As a result of influx of additional greenhouse gases (whether man-made or natural) global warming is increasing at a faster rate.
*Infrared radiation is bounced back to earth by insulating gases.
*According to textbook, over last 120 years average global temps have risen over 0.5 degree Celsius.
Videos!
“Futurama” Video
NASA Climate Change:A Warming World
Climate Change FlowChart
Natural Biological Emissions
& Man-Made Carbon
Emissions from Fossil Fuels
Influx of Greenhouse
Gases
Greenhouse Effect
Global Warming
Climate Change
Ecological Shifts that
Affect Us!Socially,
Financially, Economically,
Agriculturally, and Environmentally
Why Such a Political Issue?
Why Do You Think?
Who Might Say YES its man-made!
Who Might Say NO its natural!
Who is Right?
Does It Matter Who Is Right?
NOPE! Why?
What Can WE ALL Agree on?Brainstorm with classsmates
#1 We ALL Agree that …..
The USA Needs to be Energy
Independent!-USA is the third largest producer of oil, yet we still import over 60% of what we need!
#2 We ALL Agree that …..
Fossil Fuels Will Eventually Run
Out!In YOUR lifetime this is going to be a serious issue …. As the supplies start to dwindle, population will continue to grow …. What will happen to the price?
#3 We ALL Agree that …..
Conservation is Inherently a
Good ThingMaking things more efficient and reducing costs …. What’s the argument?
Effects of Climate Change
Coral Bleaching & Ocean pH
Weather & Hurricanes
Shrinking Ice Caps and Poles
Gulf Stream & Europe
The End