Fossil Fuel
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An energy source made of the remains of organisms that lived long ago, like coal or oil
Real World Example
Imagine you have a piggy bank where you've been saving coins over many years, but you haven't added anything recently. Just like relying on those saved coins when you need extra cash, fossil fuels are like Earth's piggy bank, filled with energy from ancient organisms that lived millions of years ago. The coins represent the accumulated energy stored in coal or oil, and just as the piggy bank eventually empties if not replenished, fossil fuels are finite resources that can be used up over time.
Practice Version
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