Final answer:
The statement is True; fossil fuels contain energy from photosynthesis performed by ancient plants and organisms, which over millions of years, have converted into hydrocarbons that store solar energy in chemical form.
Step-by-step explanation:
The statement that fossil fuels are full of energy stored from photosynthesis millions of years ago is True. Fossil fuels such as coal, oil, and natural gas originate from the organic matter of plants and other photosynthetic organisms that were buried and, over millions of years, transformed through anaerobic decay. This process compressed and heated the dead organic matter, converting the stored photosynthetic energy into the hydrocarbons that make up fossil fuels. Essentially, fossil fuels can be viewed as a highly concentrated form of solar energy that has been chemically stored through ancient biological activity. According to the law of conservation of energy, energy is not lost but can only change forms. The energy that was originally captured by plants through photosynthesis from sunlight is stored in the chemical bonds of fossil fuels. When we burn fossil fuels, the stored chemical energy is released, mostly as heat, which we then harness for various energy needs. Fossil fuels thus represent an ancient, dense, and effective form of energy storage that far surpasses current energy storage technologies in terms of longevity and energy density. No modern storage method, including batteries or hydroelectric reservoirs, can maintain energy without loss for such an extended duration as millions of years.