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Grade 9 Physics: Flashcard questions
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non-renewable energy resources - a resource that cannot be replaced as quickly as it isused up
renewable energy resources - natural energy resource that is unlimited or that can be
replenished by natural processes in a relatively short period of time.
fossil fuels - fuel produced by the decayed and compressed remains of plants that lived
hundreds of millions of years ago
Pros and cons of fossil fuels (3,4) - cheap and accessible
reliable
sustains economy
finite
extraction/processes harm environment
releases greenhouse gasses
release pollutants
nuclear energy - the decay of atomic elements
only occurs in power plants
ontarios energy is 52% nuclear
can be used for making weapons
pros and cons of nuclear energy (2,4) - reliable and efficient
clean and green
expensive to build and maintain
advanced
radioactivity
accidents rare but dire
renewable energy - an energy resource that is available on a continuous basis
solar energy - energy produced by the sun
photovoltaic cells - used to harness solar energy to generate electric current
pros and cons of solar energy (2,3) - free and limitless
clean and green
highly inefficient only 10-20% is transformed
expensive to manufacture and maintain
materials are hazardous
wind energy - the energy of moving air
pros and cons of wind energy (2,3) - free and limitless
clean and green
unreliable 15-20% of wind is usable
expensive to m&m
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