Transcript Greenhouse gases

Science Starter
At night the moon is -387F,
and during the day it is
253F.
Why do you think temperatures
are so much more extreme on
the moon than on earth?
Agenda
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Science Starter
What is Global Warming?
Global Warming Effects
Climate Change Prediction Group Work
Global Warming Foldable
Exit Ticket
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Lesson Essential Question
How do human activities impact
global climate change?
NPR-National Geographic
Global Warming Video
• http://www.npr.org/news/specials/clima
te/video/
• Part 1, 4 and 5
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Think about it…
In the summer, why does the inside of a car get
very hot when it is sitting in the sun?
The heat from the sun goes into
the car. The windows on the car
trap the heat inside. This makes
the inside of the car heat up
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GREENHOUSE EFFECT
When incoming solar radiation (heat) is
absorbed by gases in the atmosphere.
(Just like the windows in
a car trap heat, the
gasses in the
atmosphere trap
heat.)
Without the atmosphere,
earth would be 59 F
colder!
GREENHOUSE EFFECT
What traps the heat?
•Water vapor (H2O)
•Carbon dioxide (CO2)
•Nitrous oxide (N2O)
•Methane (CH4)
•These are called “greenhouse gases.”
•The more greenhouse gases in the troposphere, the warmer
our planet gets.
Climate Change Reading:
• As you read the article, ANNOTATE:
Underline important phrases
Circle key terms
Exclamation point or star
in margins
of important sections
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Increasing temperatures
http://www.youtube.com/wat
ch?v=oJAbATJCugs
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Rising Sea Levels
• https://www.youtube.com/watch?v=xLokKVdk7I
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SO CLEARLY…
• Climate change affects different
places in different ways
• IN A GROUP, you are to:
– Read the description of your country
– Answer the questions about how
climate change will specifically affect
your country
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Foldable - outside
Cause
(why it happens)
Immediate effect
(what is happening)
Outcome
(what does it change)
Foldable - inside
• 5 Causes of
global
warming
•Definition of • 5 changes to
global warming
our Earth as a
•Definition of
result of
green house gas
global
OR
effect
warming
•Complete
• 3 Causes and description of
OR
1 picture
what
greenhouse • 3 changes
gases are doing
and 1 picture
to our Earth
EXIT Ticket
1. Which greenhouse gas is the most abundant in our atmosphere?
a. Oxygen b. Carbon Dioxide c. Nitrous Oxide
d. Methane
2. Which of the following has caused the greatest increase in global
warming?
a. Burning of fossil fuels
c. People breathing out
b. Increases in atmospheric nitrogen
d. Turning lights off
3. The burning of fossil fuels is causing an increase in the following:
a. Atmospheric nitrogen
b.
Atmospheric oxygen
c. Atmospheric carbon dioxide d.
Atmospheric phosphate
4. What is the main source of methane in our atmosphere:
a. Chemical manufacturing
c. Cow flatulence and feedlots
b. Cutting down trees
d. humans exhaling
Foldable - inside
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Burning of fossil fuels
adds CO2 and other
greenhouse gases to
atmosphere
•
Urbanization creates
heat islands and
causes deforestation
• Fewer trees to
take in CO2
•
Greenhouse effect
traps heat in
atmosphere
Global warming: an •
increase in global
temperatures as a
result of increases in
CO2 levels (and other
greenhouse gases)
Melting ice caps and
glaciers
o Leads to rise in
sea level
o Loss of habitat for
polar animals
•
Change in weather
patterns
• Floods, droughts,
more intense
storms
•
Loss of plant and
animal species
Greenhouse gases
• Carbon Dioxide (CO2)
– Emitted through burning
fossil fuels
How are
greenhouse
gases emitted
into the
atmosphere?
• Methane (CH4)
– Emitted during
production of fossil fuels
• Nitrous Oxide (N2O)
– Emitted during farming
and industrial activities
• F-gases
– Ex: hydrofluorocarbons
– Emitted during industrial
processes
How is
agriculture
affected by
climate
change?
• In the long run, climactic
change would affect
agriculture in many ways
– Lower quality/quantity of
crops
– Agricultural practices like
fertilizers and insecticides
– Soil drainage and erosion
– Reduction of crop diversity
– Less competition among
organisms
How is species
diversity affected
by climate change?
• Species that depend
on one another may
become out of sync.
• For example, plants
could bloom earlier
than their
pollinating insects
become active
How is
ecosystem
balance
affected by
climate
change?
Ecosystems will change—
some species will move
farther north or become
more successful; others
won’t be able to move and
could become extinct.
Ex: Polar Bears
Discovery ed: The
Impact of Climate
Change on Polar Bears
How are
oceans
impacted by
climate
change?
Ocean Acidification: The
ongoing decrease in
the pH of the Earth's
oceans caused by the
uptake of CO2 from the
atmosphere.
A more acidic ocean
could wipe out
species, disrupt the
food web and impact
fishing and tourism.
How are sea
levels
impacted by
climate
change?
• Higher temperatures
cause ice to melt
• Water absorbs more
heat than ice so
temperatures will
continue to rise
• This causes shoreline
erosion and coastal
flooding
http://www.youtube.com/watch?v=-xLokKVdk7I
How are
weather
patterns
changed by
climate
change?
More intense heat waves
and droughts in some
region and fewer events
in other places are
predicted.