quiz-template.pptx

1. What form of renewable power is Australia's
largest potential energy source?
Renewable Energy Quiz
How much do you know about renewables? Test yourself with the quiz.

Correct.
With all the sunshine we get over this large
continent, it's not surprising that solar radiation is
Australia's largest potential energy source. In
fact, the average amount of solar energy that
falls on Australia is about 15,000 times our
national energy use.

Wrong answer, sorry.
The correct answer is solar.
With all the sunshine we get over this large
continent, it's not surprising that solar radiation is
Australia's largest potential energy source. In
fact, the average amount of solar energy that
falls on Australia is about 15,000 times our
national energy use.

2. What percentage of sunlight can the best
silicon solar cells convert into electricity?

Correct.
Currently the world's best silicon solar cells are
only able to convert 25 per cent of the incident
sunlight that falls on them into electricity.
Scientists expect that first-generation silicon
photovoltaic cells will only ever be able to reach
29 per cent maximum efficiency because of the
energy they lose as heat and the limits imposed
by the material itself.

The correct answer is 25%.
Currently the world's best silicon solar cells are
only able to convert 25 per cent of the incident
sunlight that falls on them into electricity.
Scientists expect that first-generation silicon
photovoltaic cells will only ever be able to reach
29 per cent maximum efficiency because of the
energy they lose as heat and the limits imposed
by the material itself.

3. Which state has the lowest rate of solar panel
installations?

Correct.
Only one solar panel unit per 3804 people has
been installed in Western Australia since the
federal government's rebate scheme was
introduced in 2000. Sunny Queensland has also
been sluggish with only one in 2112 people,
whereas South Australia has had one unit
installed per 455 people.

The correct answer is Western Australia.
Only one solar panel unit per 3804 people has
been installed in Western Australia since the
federal government's rebate scheme was
introduced in 2000. Sunny Queensland has also
been sluggish with only one in 2112 people,
whereas South Australia has had one unit
installed per 455 people.

4. How much electricity is produced by hydro-
electric power in Australia each year?
2,000 Gigawatt hours

Correct.
While there are about 100 hydroelectric power
stations in Australia they produce only a small
proportion of Australia’s electricity. This output
fell seven per cent in the nine years to 2005-
2006 because dry conditions in New South
Wales, Victoria and Tasmania meant there was
reduced water flows available for hydro power
generation.

The correct answer is 16,000 Gigawatt hours.
While there are about 100 hydroelectric power
stations in Australia they produce only a small
proportion of Australia’s electricity. This output
fell seven per cent in the nine years to 2005-
2006 because dry conditions in New South
Wales, Victoria and Tasmania meant there was
reduced water flows available for hydro power
generation.

5. Which of the following renewable energy
sources are able to provide baseload power?
Baseload power is the minimum amount of power that an electricity company
must make available – typically that is power 24 hours per day.
How much do you know about renewables? Test yourself with quiz.
All of these

Correct.
Geothermal energy, which uses heat that naturally occurs beneath the Earth's
surface, is able to provide a baseload or continuous power output, whereas
the other renewable sources are more intermittent. However, hot rock
geothermal technology has not yet been commercially proven in Australia.
There are hopes that in the future solar will also be able to provide baseload
power through concentrating solar power systems. Instead of converting
sunlight directly to electricity, these systems use sunlight to heat a liquid
solution that can be stored in insulated tanks and then circulated through
steam turbines to generate electricity whenever it is required, including during
non-sunlight hours.

The correct answer is Geothermal.
Geothermal energy, which uses heat that naturally occurs beneath the Earth's
surface, is able to provide a baseload or continuous power output, whereas
the other renewable sources are more intermittent. However, hot rock
geothermal technology has not yet been commercially proven in Australia.
There are hopes that in the future solar will also be able to provide baseload
power through concentrating solar power systems. Instead of converting
sunlight directly to electricity, these systems use sunlight to heat a liquid
solution that can be stored in insulated tanks and then circulated through
steam turbines to generate electricity whenever it is required, including during
non-sunlight hours.

6. What is ‘clean’ coal?
Washing the coal to remove impurities
Converting the coal into a fuel gas before it is combusted
Capturing and storing its carbon dioxide emissions
All of the above

Correct.
Coal currently accounts for more than half of Australia's
energy production. Clean coal technologies refer to a group
of technologies that aim to improve the efficiency and lessen
the environmental impact of burning coal for electricity. As
such this can include technologies from all stages of the
process, from washing mined coal to improve its quality,
converting coal to a gas to improve its efficiency and reduce
emissions, and geo-sequestration to capture and store the
carbon dioxide emissions produced during combustion.

The correct answer is all of the above.
Coal currently accounts for more than half of Australia's
energy production. Clean coal technologies refer to a group
of technologies that aim to improve the efficiency and lessen
the environmental impact of burning coal for electricity. As
such this can include technologies from all stages of the
process, from washing mined coal to improve its quality,
converting coal to a gas to improve its efficiency and reduce
emissions, and geo-sequestration to capture and store the
carbon dioxide emissions produced during combustion.

7. Which of the following statements about wind
energy is false?
Wind energy is an indirect form of solar energy
Wind turbines generate more than 1 per cent of global electricity
Many countries are building offshore wind farms
to capitalise on the stronger winds found at sea
Wind turbines reach maximum power output at
wind speeds of 25 metres per second

Correct.
Winds blowing at 25 metres per second are gale force winds
and wind turbines would shut down under these conditions.
Turbines reach their maximum power output around a more
sedate 13 metres per second.
While wind energy is big globally, Australia only ranks sixteenth
in the World Wind Energy Association's 2008 wind power
capacity rankings despite having some of the most reliable
winds in the world. It's unlikely that we will build many offshore
wind farms to turn this situation around as they cost a lot to
build and we have a wealth of land on which to build wind
farms.

The correct answer is that “wind turbines reach maximum power
output at wind speeds of 25 metres per second” is false.
Winds blowing at 25 metres per second are gale force winds and wind
turbines would shut down under these conditions. Turbines reach their
maximum power output around a more sedate 13 metres per second.
While wind energy is big globally, Australia only ranks sixteenth in the
World Wind Energy Association's 2008 wind power capacity rankings
despite having some of the most reliable winds in the world. It's
unlikely that we will build many offshore wind farms to turn this
situation around as they cost a lot to build and we have a wealth of
land on which to build wind farms.

8. What is the theoretical power of a single five
metre high wave equivalent to?
200 MW per kilometre of coastline

Correct.
Comparable to an ordinary coal-fired power station, the
theoretical power of a single five metre high wave, which
is a fairly large wave, is 1000 MW per kilometre of
coastline. In practice however, only a small fraction of
this energy can be extracted because the intensity of
waves varies so much hourly, daily and even seasonally.
Wave power technology is still very much in the research
and development phase.

The correct answer is 1000 MW per kilometre of coastline.
Comparable to an ordinary coal-fired power station, the
theoretical power of a single five metre high wave, which is a
fairly large wave, is 1000 MW per kilometre of coastline. In
practice however, only a small fraction of this energy can be
extracted because the intensity of waves varies so much
hourly, daily and even seasonally. Wave power technology is
still very much in the research and development phase.

9. What is not a major constraint preventing the
widespread use of hydrogen as a replacement
for fossil fuels?
It is too hard to produce
We do not have the necessary
infrastructure to deliver hydrogen
It is difficult to store
It cannot be used in private cars

Correct.
There are plenty of hurdles to be overcome before
hydrogen can replace fossil fuels more widely. The car
industry, however, has championed the use of hydrogen
as an alternative fuel source for years, and many
manufacturers are developing fuel cell vehicles.

The correct answer is it cannot be used in private cars.
There are plenty of hurdles to be overcome before
hydrogen can replace fossil fuels more widely. The car
industry, however, has championed the use of hydrogen as
an alternative fuel source for years, and many
manufacturers are developing fuel cell vehicles.

10.What pest could potentially help us produce
biofuels?
Cockroaches Termites Flies Spiders

Source: www.abc.net.au/science/games/quizzes/2008/cleanenergy/
Correct.
Believe it or not, termites could actually help us produce
biofuels. While we can use crops like sugarcane for biomass
there is also a lot of energy locked up in the woodier parts of
plants in something called ligno-celluloses that we currently
can't access. Termites produce enzymes that work with
microorganisms in their guts to convert this material into
simple sugars. By emulating their system scientists might be
able to find a way to unlock this potential energy source for
biofuel production.

Source: www.abc.net.au/science/games/quizzes/2008/cleanenergy/
The correct answer is termites.
Believe it or not, termites could actually help us produce biofuels.
While we can use crops like sugarcane for biomass there is also a
lot of energy locked up in the woodier parts of plants in something
called ligno-celluloses that we currently can't access. Termites
produce enzymes that work with microorganisms in their guts to
convert this material into simple sugars. By emulating their system
scientists might be able to find a way to unlock this potential
energy source for biofuel production.

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