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Define renewability
Renewable energy is energy that is collected from renewable resources that are naturally replenished on a human timescale.
What is a fossil fuel?
A fossil fuel is a hydrocarbon-containing material formed naturally in the Earth's crust from the remains of dead plants and animals that is extracted and burne
What is the difference between brown and black coal?
Black coal has higher energy content, Brown coal has more impurities
Which type of coal has a higher energy content?
Black coal has higher energy content
What is the scientific term for brown coal?
Natural gas supplies what % of Australia's energy needs?
Name the three types of biofuel
Bioethanol, biodiesel, biogas
Why are biofuels considered to be "better" despite releasing CO2?
They are made of photosynthetic organisms
Crude oil is made from
Marine plant and animal matter
Energy content is measured by
joules/g
Name a type of fossil fuel
coal, gas, crude oil
Four characteristics of suitable fuels:
Ignition, Storage, Energy content, by-products
In Australia, which resource is likely to last longer before depleted?
Coal
Define the Greenhouse Effect
The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blank
