Biology- B7 Part C

1. Food chains are divided into ... -> They are the different stages of a food chain. ... are named after their location in food chain using numbers. (7, 6)
4. A growing population has a greater effect on the ... -> we produce more waste - if we don't properly sort waste out, we will cause more harmful pollution. We have increased our demand for natural resources so we are polluting the ... even more (11)
5. Biogas production: ... generator -Small scale, manually loaded with waste (5)
10. Biogas production: ... generator -Made all the time, large scale, produced at a constant rate and is continuously loaded with waste (10)

2. ... is where gases in the atmosphere act as an insulating layer- so the temperature increases but if not, earth would be too cold for us to survive. Greenhouse gases - Carbon Dioxide and Methane, they trap radiation increasing temperature leading to (6, 7)
3. Destroying ... adds carbon dioxide to the atmosphere -> carbon is stored in them from plants that haven't fully decayed. (4, 4)
6. Compost is ... organic matter. Rate of ... is affected by several factors: -Temperature-> Higher increases the rate -Water availability-> Faster rate in moist places -Oxygen availability-> Oxygen for respiration -No. of ... organisms-> Fast with more (5)
7. ... of Ecosystems and Biodiversity: -Protecting biodiversity costs money -Protecting biodiversity affects local peoples lifestyles -Conflict between protecting biodiversity & protecting food security -Development is important but effects environment (6)
8. ... has to be used straight away. Mainly made up of Methane which is burned as fuel. Anaerobic decay produces methane. ... is made in a generator at constant temperature (6)
9. ... is the chopping down of trees for: -Clearing land for farming -Grow crops for production of biofuels. ... causes lot's of problems -Less carbon dioxide taken in by trees -More carbon dioxide in the atmosphere -Less Biodiversity (13)

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