What remains are the starting material for fossil fuels?
The remains of ancient organisms buried before they fully decomposed.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Foundation · 5.9.1.4
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What remains are the starting material for fossil fuels?
The remains of ancient organisms buried before they fully decomposed.
How did buried organic material become fossil fuels?
Over millions of years, heat and pressure changed it into carbon-rich fuels.
What materials formed coal, and what formed crude oil and natural gas?
Coal: mainly ancient plant material. Crude oil and natural gas: mainly microorganisms and other marine life buried in sediments.
How did fossil fuel formation affect atmospheric carbon dioxide?
It stored carbon from organisms underground, reducing the amount in the atmosphere as carbon dioxide.
What does photosynthesis use to make biomass, and what supplies the energy?
It uses carbon dioxide and water to make biomass, such as sugars, using energy from light.
How did the spread of algae and plants affect the percentage of carbon dioxide in Earth’s atmosphere over time?
It reduced the percentage of atmospheric carbon dioxide through photosynthesis.
Where did carbon removed from the atmosphere by photosynthesis become stored over time?
In living material in the biosphere, and later in dead organic matter.