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| Question | Answer |
| how can the efficiency of food production be increased? | reducing the number of stages in the food chain as at each stage in the food chain, less material and less energy are contained in the biomass of the organisms. |
| how could the efficiency of food production also be improved? | keeping animals in a controlled environment by limiting their movement and controlling the temperature of their surroundings |
| Fish stocks are declining. Name 2 methods that play an important role in the conservation of fish stocks. | -net size limitations (no smaller fish caught and wasted) -fishing quotas (fishermen only allowed to catch a certain amount each day) |
| What fungus is used for producing mycoprotein? | fusarium |
| what is mycoprotein? | a protein rich food suitable for vegetarians. |
| how is mycoprotein produced? | -grown on glucose syrup -in aerobic conditions -the biomass is harvested and purified |
| learn the process that happens in a biogas generator | |
| what man is so legendary that he is cooler than any biogas generator? | |
| what will you miss after you have gone to giggleswick? |
Image:
ella_ellie (image/jpg)
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| who went a bit crazy with adding images? | |
| who went a bit crazy with adding images? | |
| what has caused more waste to be produced? (2) | -rapid growth in the human population -increase in the standard of living |
| give one example of how waste may pollute water supplies | -sewage -fertilizer - toxic chemicals |
| give one example of how the air may become polluted | (the best example to use) smoke and gases such as SULPHUR DIOXIDE which contributes towards acid rain |
| give an example of how land may become polluted. | toxic chemicals such as pesticides, which may be washed from the land into waterways |
| how have humans reduced the land available for other animals and plants? | -building -quarrying -farming -dumping waste |
| why is deforestation occurring? 3 reasons | -wood for materials such as timber or paper -make space to rear cattle or grow crops -space to build developments (cities towns) |
| what are 2 effects of deforestation on co2 levels? | -reduced the rate at which C02 is removed from the atmosphere and 'locked up' -increased release of C02 because of burning and the activities of microorganisms |
| in terms of species, what is another effect of deforestation? | reduction in biodiversity |
| How has the production of bio-fuels effected deforestation? | increased as space is needed to grow crops like sugar cane from which biofuels, based on ethanol, can be made |
| How has the population increase led to an increase of methane in the atmosphere? | more people=more food needed to cope for growing food demands, increases in cattle and rice fields have occurred. These organisms produce methane leading to an increase of methane in the atmosphere |
| what is an effect of the destruction if peat bogs? | releases carbondioxide |
| what may an increase in the earths temperature cause? (5) | -big changes to the earths climate -a rise in sea level -may reduce biodiversity -cause changes in migration patterns -may result in changes in the distribution of species |
| how are lakes and oceans an important factor in removing CO2 from the atmosphere? | CO2 can be sequestered in oceans, lakes and ponds and this is an important factor in removing CO2 from the atmosphere |
| How is biogas (mainly methane) produced? | by anaerobic fermentation of a wide range of plant products or waste material containing carbohydrates. |
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