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Enviro SAC
N/A
36
Environmental Studies
12th Grade
03/21/2009

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Cards

Term
Name four unnatural processes/sources that produce methane.
Definition
The extraction of fossil fuels, rotting of vegetables in rice paddies, rotting of rubbish in landfills and farm animals.
Term
Name five unnatural processes/sources that produce nitrous oxide.
Definition
Leguminous vegetables, cars, soil cultivation, use of fertiliser and chemical manufacture.
Term
Do chlorofluorocarbons occur naturally?
Definition
No.
Term
Name three sources of CFCs, and what CFC stands for.
Definition
Aerosols, refrigerants and the manufacture of foam products. Chlorofluorocarbon.
Term
How are perfluorocarbons produced?
Definition
Production of aluminium.
Term
Name two sources of ozone.
Definition
Car exhaust and coal-burning plants.
Term
How much has stationary power's emissions changed since 1990?
Definition
Increased by 1.2%
Term
How much has transport of fuel's emissions changed since 1990?
Definition
Increased by 1.2%
Term
How much has fugitive emissions levels changed since 1990?
Definition
Increased by 2.2%
Term
How much has industrial processes' emissions changed since 1990?
Definition
Decreased by 3.6%
Term
How much has agriculture's emissions changed since 1990?
Definition
Decreased by 2.1%
Term
How much has land use, land change and deforestation's emissions changed since 1990?
Definition
Decreased by 5.2%
Term
How much has waste's emissions changed since 1990?
Definition
Decreased by 0.7%
Term
What is energy?
Definition
An object or system's ability to perform work.
Term
What is kinetic energy?
Definition
The energy of movement.
Term
What is potential energy?
Definition
Stored energy, associated with an object's position.
Term
What is mechanical energy?
Definition
The movement of on object and the conversions of potential energy into other forms of energy.
Term
What is heat?
Definition
Thermal energy
Term
What is temperature?
Definition
A measure of the average kinetic energy of the molecules within a material.
Term
What is chemical energy?
Definition
A form of potential energy that is due to the relative positions of the atoms and their electrons in the substance's molecules.
Term
What is respiration?
Definition
The conversion of ATP's potential energy into kinetic energy.
Term
What is required to cause a change in state?
Definition
Thermal energy.
Term
What is an energy source?
Definition
A naturally occurring fuel or source of energy.
Term
What is an exothermic reaction?
Definition
A reaction that releases heat.
Term
What is an endothermic reaction?
Definition
A reaction that takes in heat.
Term
What is power?
Definition
The amount of energy available or used over a given time.
Term
How many joules are in a kilojoules?
Definition
10^3.
Term
What is a watt?
Definition
The unit used for measuring power.
Term
power (watts) =
Definition
energy (joules)/time (seconds)
Term
What is the 1st law of thermodynamics?
Definition
The law of conservation of energy.
Term
What is the 2nd law of thermodynamics?
Definition
When energy is converted from one form to another, some of it becomes degraded into a lower quality energy.
Term
What is entropy?
Definition
The level of energy disorder in a system.
Term
Energy efficiency (%)=
Definition
useful energy out put/total energy input X 100
Term
Fossil fuels a formed from what?
Definition
Dead and decaying organisms trapped under layers of sediments or rock.
Term
What is the earth's atmosphere?
Definition
A thin protection layer of gases and particles around the earth.
Term
Name the different layers/zones in the atmosphere.
Definition
Troposphere, tropopause, stratosphere, stratopause, mesosphere, mesopause, thermosphere.
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