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What is the main difference between renewable and non-renewable energy sources?
Renewable energy sources can be regenerated naturally, while non-renewable energy sources exist in fixed amounts and cannot be regenerated.
What happens if renewable resources are used faster than they regenerate?
They can become exhausted and no longer be considered renewable.
Give an example of a depletable renewable resource.
Biomass, such as wood, which can be depleted if the rate of use exceeds the rate of regrowth.
Name a non-depletable renewable resource.
Solar energy, as it will not run out regardless of usage.
What are fossil fuels derived from?
Fossilized remains of biomass that have been compressed under rock over millions of years.
Why are fossil fuels considered non-renewable?
They do not regenerate on a time scale accessible to humans and will eventually run out.
What type of energy source is nuclear power and why is it non-renewable?
Nuclear power is non-renewable because it relies on finite radioactive elements like uranium, which will eventually be depleted.
What does the term 'rate of consumption' refer to in renewable energy?
It refers to the speed at which renewable resources are used; they must be consumed at or below their rate of regeneration.
What was observed in the graph showing deforestation and reforestation rates?
Deforestation rates exceed reforestation rates, causing forests to become depleted rather than renewable.
Based on current consumption trends, how many years are estimated before crude oil runs out?
Approximately 50 years.
What is the suggested science skill to practice regarding biomass?
Explain whether biomass is a renewable energy source and justify your answer.
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