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Energy from Biomass

This review explores the fundamental processes of biomass energy, highlighting how plants convert sunlight and carbon dioxide into glucose and oxygen. It underscores the importance of glucose as an energy molecule for various consumers and details essential processes like cellular respiration and fermentation. The role of greenhouse gases in regulating Earth’s temperature is discussed, alongside the implications of fossil fuel consumption on atmospheric CO2 levels and global warming. Strategies to mitigate CO2 emissions are also suggested through review tasks.

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Energy from Biomass

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  1. Energy from Biomass Masterton 2011

  2. Review • _____________________ – produces glucose and oxygen by using sunlight and carbon dioxide • ____________ is key energy molecule for consumers • To be used it must be ____________________ • 2 key processes: • Cellular respiration (________________________) • Fermentation (__________________________) (by bacteria, fungi)

  3. Cellular Respiration Glucose + oxygen →

  4. Even though plants produce their own food they still have to break down some glucose themselves for their own ________________. • Thus they also carry out cellular respiration. • They produce much less CO2 than they consume and utilise much less O2 than they produce.

  5. Greenhouse gases • Greenhouse gases- atmospheric gases that ______________heat from leaving the atmosphere (thus ___________________ the temperature of the atmosphere). • Water vapour, carbon dioxide, methane • Greenhouse gases are essential to _________________ the temperature of Earth • Problem – enhanced greenhouse effect

  6. Fossil Fuels • Biomass in dead organisms was captured in time in areas where there was not enough oxygen to allow decomposition. • Covered up, increased temp., increased pressures led to biomass being turned into _________, ___ and ________________________. • Have accumulated over millions of years • Large portions have been consumed in last 2-3 centuries • This has caused the CO2 and methane levels in atmosphere to __________________. • This has resulted in temp ↑ - aka global warming.

  7. How to reduce CO2 in atmosphere • Homework • Read and take notes p32-35, copy fig 1.23 • p23 Q1-4 • p31 Q1-4 • p36 Q1-3, 5, 6

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