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Flashcards in Chapter 13 Deck (12):
1

The atmosphere

Contains
78% Nitrogen
21% Oxegyn
1% Argon and also...
0.04% carbon dioxide and water vapour

2

Reduction of CO2 by formation of deposits

COAL: Plants absorb CO2 - Die and decay - Compress to form coal.
OIL & NATURAL GAS: Plankton absorbed CO2 - Die and deposited in muds on sea floor - Compressed over millions of years.
LIMESTONE: Shelled animals absorb CO2 - Make calcium carbonate shells - Remains compressed to form limestone.

3

Greenhouse Effect and Global Warming

GREENHOUSE EFFECT: Temperature on Earth - High enough to support life.
GREENHOUSE GAS: Water vapour, methane and carbon dioxide.
SHORT WAVELENGTH RADIATION: Sun's radiation - Pass-through Earth's atmosphere - Warms the surface - Without being absorbed.
LONG WAVE RADIATION: radiation from Earths surface - absorbed by GG - Doesn't escape the atmosphere.
CARBON FOOTPRINT: Total amount carbon dioxide - and other GG - Emitted over the full lifecycle.
GLOBAL WARMING: increase of the average temperature of the Earth.

4

How humans increase carbon dioxide in the atmosphere

-Combustion of fossil fuel
-Deforestation

5

How humans increase methane in the atmosphere

-Increased animal farming
-Decomposition of rubbish landfill
-Beef is the most popular meat eaten by humans

6

How humans can decrease carbon dioxide concentration

-Use alternative forms of energy Eg. wind turbines
-Energy efficiency
-Carbon capture
-Carbon off-setting - more trees

7

How humans can decrease methane concentrations

-Alternative foods
-Increased recycling

8

Effects of global warming

-Some regions will not be able to produce enough food because of drought
-Changes top distribution of species
-Increase in sea levels
-Reduction of water supplies

9

COMMON POLLUTANTS:
Carbon monoxide

FORMULA: CO
CAUSE: Incomplete combustion of a hydrocarbon fuel
EFFECT: Toxic gas. Colour/odourless. Hard to detect

10

COMMON POLLUTANTS:
Sulfur dioxide

FORMULA: SO2
CAUSE: Burning coal or petrol
EFFECT: Respiratory problems and acid rain

11

COMMON POLLUTANTS:
Nitrogen oxides

FORMULA: NO
CAUSE: Car engines. N2 + O2 from air at high temperatures
EFFECT: Respiratory problems and acid rain

12

COMMON POLLUTANTS:
Particules

FORMULA: CO2
CAUSE: Incomplete combustion
EFFECT: Global dimming