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