Energy from Biomass

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 →

5. 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.

6. 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

7. 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.

8. 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