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The Greenhouse Effect
Section 3.3 (continued)
Greenhouse Effect
A process in which certain gases in Earth’s
atmosphere absorb heat from the Sun &
heat radiated from Earth’s surface.
This warms the earth’s surface.
Keeps Earth’s temperature within a certain
range.
Plants can grow year round in a
greenhouse.
Greenhouse Effect
Greenhouse Effect
1) Solar energy enters Earth’s atmosphere
2) Surface absorbs solar energy &
radiates some energy as heat
3) Certain gases in atmosphere absorb
heat radiated from surface
4) Gases radiate heat they absorb, heating
the atmosphere & warming Earth
Greenhouse Effect
A) Keeps air inside the greenhouse warm
B) Keeps air surrounding the Earth warm
Natural Greenhouse Gases (GHG)
Type Common Sources Other Details
Water
vapour
●Evaporation from water
●By plants, animals, & other
organisms
●Most abundant GHG 70%
●Varies with temperature
●Produced during cellular
respiration & plant
processes
Carbon
Dioxide
●Living organism
●Volcanoes, forest fires,
decaying organisms,
release from ocean
●2nd most abundant GHG
●Produced by cellular
respiration in most
organisms
Methane ●Certain bacteria’s &
microorganisms found in
bogs, wetlands, melting
permafrost
●By-product of some
cellular processes
●Some species extract
energy from food in
absence of O2
Nitrous
Oxide
●Bacteria live in oceans &
wet, warm soils ex.
Tropics
●Produced when species of
bacteria break down
nitrogen rich compounds
from food
Hydrosphere
Water in all its different forms on Earth.
Includes oceans, lakes, rivers, ice,
snow, and water vapour.
66% of planet in
oceans.
Moderates
temperature &
transfers heat.
Carbon Sink: activity or mechanism that
absorbs & stores carbon dioxide from the
atmosphere.
Moderates temperature by oceans removing
CO2 from the atmosphere.
Hydrosphere Transfers Heat
Cold water (dense) sinks in oceans and
displaces warm water around it.
Salt water is more dense, and sinks &
displaces less salty water.
Creates deep water currents called “GREAT
OCEAN CONVEYOR BELT”.
Belts carry water around the world.
Great Ocean Conveyor Belt
Seatwork / Homework
Read Section 3.3 (p. 218-224)
List the 4 main gases in the greenhouse
effect, and where they come from.
Answer Questions:
p. 219 #2, 3
p. 221 #1, 2
p. 225 #1-3
p. 229 #4-8

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04 - The Greenhouse Effect.ppt.pptx

  • 2. Greenhouse Effect A process in which certain gases in Earth’s atmosphere absorb heat from the Sun & heat radiated from Earth’s surface. This warms the earth’s surface. Keeps Earth’s temperature within a certain range. Plants can grow year round in a greenhouse.
  • 4. Greenhouse Effect 1) Solar energy enters Earth’s atmosphere 2) Surface absorbs solar energy & radiates some energy as heat 3) Certain gases in atmosphere absorb heat radiated from surface 4) Gases radiate heat they absorb, heating the atmosphere & warming Earth
  • 5. Greenhouse Effect A) Keeps air inside the greenhouse warm B) Keeps air surrounding the Earth warm
  • 6. Natural Greenhouse Gases (GHG) Type Common Sources Other Details Water vapour ●Evaporation from water ●By plants, animals, & other organisms ●Most abundant GHG 70% ●Varies with temperature ●Produced during cellular respiration & plant processes Carbon Dioxide ●Living organism ●Volcanoes, forest fires, decaying organisms, release from ocean ●2nd most abundant GHG ●Produced by cellular respiration in most organisms Methane ●Certain bacteria’s & microorganisms found in bogs, wetlands, melting permafrost ●By-product of some cellular processes ●Some species extract energy from food in absence of O2 Nitrous Oxide ●Bacteria live in oceans & wet, warm soils ex. Tropics ●Produced when species of bacteria break down nitrogen rich compounds from food
  • 7. Hydrosphere Water in all its different forms on Earth. Includes oceans, lakes, rivers, ice, snow, and water vapour. 66% of planet in oceans. Moderates temperature & transfers heat.
  • 8. Carbon Sink: activity or mechanism that absorbs & stores carbon dioxide from the atmosphere. Moderates temperature by oceans removing CO2 from the atmosphere.
  • 9. Hydrosphere Transfers Heat Cold water (dense) sinks in oceans and displaces warm water around it. Salt water is more dense, and sinks & displaces less salty water. Creates deep water currents called “GREAT OCEAN CONVEYOR BELT”. Belts carry water around the world.
  • 11. Seatwork / Homework Read Section 3.3 (p. 218-224) List the 4 main gases in the greenhouse effect, and where they come from. Answer Questions: p. 219 #2, 3 p. 221 #1, 2 p. 225 #1-3 p. 229 #4-8