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GREEN HOUSE EFFECT
Text 98-103
*
Essential Questions Definitions Learning outcomes
A. How has global
climate changed in
the last 150 years?
B. Is climate change
natural or human
induced?
C. What is greenhouse
effect and how does
it work?
D. What is the
enhanced
greenhouse effect?
E. How do human
activities lead to
climate change?
- Climate has
changed in the
past through
entirely natural
causes.
- Human activities
are impacting
the climate
system through
increasing the
amount of
greenhouse
gases in the
atmosphere
- Explain natural
causes
contributing to
climate change
- Explain the
greenhouse effect
- Explain how
various human
activities have led
to an increase in
greenhouse gases
which contribute
to the enhanced
greenhouse effect.
*Increase in global
temperatures over a
long period of time
*Decrease in global
temperatures over a
long period of time
*
*
- Significant
increases
between 0.3 C
and 0.6 C.
- Mean global
temperatures
rose faster
between 1980
and 2000
*
Natural
factors
Variations in
solar output
Volcanic
eruptions
Human factors
(Green house effect)
Burning fossil
fuels
Deforestation
Changing land
use
Agriculture
Industries
Urbanization
Because Darren Can Always Iron Uniform
Sun emits differing amounts of solar
radiation due to changes in magnetic
field
High temperatures
Because more sunspots found
Sunspots = Higher solar activity
Low temperatures
Lesser sunspots found
Lower solar activity
* natural
* natural
Large amount of CO2, water vapour, sulphur
dioxide, dust and ash released
Results in global dimming
Gradual reduction of amount of sunlight reaching
the earth’s surface
Eg Mt Pinatubo in 1991
Lowers temperatures for 2 years
Temporary effects on earth’s climate
http://www.youtube.com/watch?v=2QENyRWdImY
*
•Glass panels lets in light but keeps heat from escaping.
•So plants can grow with the trapped heat from the sun.
*Greenhouse (Cold countries)
Greenhouse effect Enhanced greenhouse
effect
Definition
Natural process to trap
heat
Human activities
- Rapid increase in amount
of greenhouse gases
Effects
Positive
- Warm the earth’s
surface
Negative
- Rise in global
temperatures
Illustration
Heat
that
reaches
earth
Heat that are
reflected back by
earth &
atmosphere
Heat is
trapped by
GH gases
Heat
given out
from the
earth
Greenhouse
gases in the
atmosphere
Solar radiation from the Sun to Earth
•Greenhouse gases in atmosphere = Glass panel
•Traps heat naturally to keep Earth warm and livable
Yellow layer = Extra Greenhouse Gases / Air pollutants
*
Greenhouse
Effect
*
*Fossil fuels = oil, coal and natural gas
*Burning fossil fuels produces large amount
of energy
*Energy to be used for: Industries,
transportation, domestic and commercial
activities eg Electricity
*Contributes to carbon dioxide (results in
ENHANCED greenhouse effect)
*Loss of forests due to removal or clearance
of trees
*Reasons: Paper, building materials, mining,
animal grazing, planting crops,
infrastructure
*Results in lesser trees to absorb Carbon
dioxide in the atmosphere
A)Agriculture
-Cultivate land
to produce
crops and
raise
livestock
Produces:
-Carbon
dioxide
-Nitrous Oxide
-Methane
B)
Industries
-Production
of goods
and
services
eg
Manufacturing
- Emission
of Carbon
dioxide
C) Urbanisation
-Increasing
number of
people living in
urban areas
(Cities and
towns)
-Fossil fuels burnt
in domestic uses
and transport
*
1.Explain natural causes contributing to
climate change. [2]
2.Explain the enhanced greenhouse
effect. [3]
3.Explain how various human activities
have led to an increase in greenhouse
gases which contribute to the
enhanced greenhouse effect.[3]

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Topic 5

  • 2. Essential Questions Definitions Learning outcomes A. How has global climate changed in the last 150 years? B. Is climate change natural or human induced? C. What is greenhouse effect and how does it work? D. What is the enhanced greenhouse effect? E. How do human activities lead to climate change? - Climate has changed in the past through entirely natural causes. - Human activities are impacting the climate system through increasing the amount of greenhouse gases in the atmosphere - Explain natural causes contributing to climate change - Explain the greenhouse effect - Explain how various human activities have led to an increase in greenhouse gases which contribute to the enhanced greenhouse effect.
  • 3. *Increase in global temperatures over a long period of time *Decrease in global temperatures over a long period of time *
  • 4. * - Significant increases between 0.3 C and 0.6 C. - Mean global temperatures rose faster between 1980 and 2000
  • 5. * Natural factors Variations in solar output Volcanic eruptions Human factors (Green house effect) Burning fossil fuels Deforestation Changing land use Agriculture Industries Urbanization Because Darren Can Always Iron Uniform
  • 6. Sun emits differing amounts of solar radiation due to changes in magnetic field High temperatures Because more sunspots found Sunspots = Higher solar activity Low temperatures Lesser sunspots found Lower solar activity * natural
  • 7. * natural Large amount of CO2, water vapour, sulphur dioxide, dust and ash released Results in global dimming Gradual reduction of amount of sunlight reaching the earth’s surface Eg Mt Pinatubo in 1991 Lowers temperatures for 2 years Temporary effects on earth’s climate http://www.youtube.com/watch?v=2QENyRWdImY
  • 8. *
  • 9. •Glass panels lets in light but keeps heat from escaping. •So plants can grow with the trapped heat from the sun. *Greenhouse (Cold countries)
  • 10. Greenhouse effect Enhanced greenhouse effect Definition Natural process to trap heat Human activities - Rapid increase in amount of greenhouse gases Effects Positive - Warm the earth’s surface Negative - Rise in global temperatures Illustration
  • 11. Heat that reaches earth Heat that are reflected back by earth & atmosphere Heat is trapped by GH gases Heat given out from the earth Greenhouse gases in the atmosphere Solar radiation from the Sun to Earth
  • 12. •Greenhouse gases in atmosphere = Glass panel •Traps heat naturally to keep Earth warm and livable
  • 13. Yellow layer = Extra Greenhouse Gases / Air pollutants * Greenhouse Effect
  • 14. *
  • 15. *Fossil fuels = oil, coal and natural gas *Burning fossil fuels produces large amount of energy *Energy to be used for: Industries, transportation, domestic and commercial activities eg Electricity *Contributes to carbon dioxide (results in ENHANCED greenhouse effect)
  • 16. *Loss of forests due to removal or clearance of trees *Reasons: Paper, building materials, mining, animal grazing, planting crops, infrastructure *Results in lesser trees to absorb Carbon dioxide in the atmosphere
  • 17. A)Agriculture -Cultivate land to produce crops and raise livestock Produces: -Carbon dioxide -Nitrous Oxide -Methane
  • 19. C) Urbanisation -Increasing number of people living in urban areas (Cities and towns) -Fossil fuels burnt in domestic uses and transport
  • 20. * 1.Explain natural causes contributing to climate change. [2] 2.Explain the enhanced greenhouse effect. [3] 3.Explain how various human activities have led to an increase in greenhouse gases which contribute to the enhanced greenhouse effect.[3]