B1.5 Energy in biomass 0.0 / 5 ? BiologyEnergy in biomassGCSEAQA Created by: LauragreeenCreated on: 09-04-17 11:40 What is the source of energy for all living things? Solar energy (radiation from the Sun) 1 of 22 How do plants and algae absorb light energy? Photosynthesis using their chlorophyll 2 of 22 What is biomass? Mass of material in living organisms 3 of 22 Does the amount of biomass increase or decrease as you go up the pyramid of biomass and why? Decrease - not all organisms at one stage are eaten by the group above, there's waste, organisms respire 4 of 22 Why does movement use up energy? Muscles use energy to contract and get hot 5 of 22 How do nutrients get recycled back into the soil? (3 ways) Trees shed leaves; in faeces; when organisms die 6 of 22 What are decomposers and what do they do? Groups of microorganisms including bacteria and fungi that feed on waste droppings and dead organisms 7 of 22 What are detritus feeders? (examples and what they do in the decay process) E.g. maggots and some types of worms - start the decay process by eating dead animals and producing waste materials 8 of 22 What are the waste products of decomposers? Carbon dioxide, water and nutrients 9 of 22 What do we mean by decay? Things being broken down and digested by microorganisms 10 of 22 What conditions speed up the process of decay? Warmer environment, moist conditions, more oxygen 11 of 22 What conditions can stop decay? Too hot or too cold 12 of 22 How do decomposers help make water safe? Break down bodily waste in sewage treatment plants 13 of 22 What can compost be used for? Fertiliser 14 of 22 What elements are all of the main molecules in our body based on? Carbon atoms + other elements 15 of 22 What is the carbon cycle? Carbon cycled between living things and the environment 16 of 22 How is carbon removed from the atmosphere, and what is it converted to in this process? By photosynthesis by green plants and algae, converted into carbohydrates, proteins and fats 17 of 22 What How is carbon returned to the atmosphere? As carbon dioxide as a waste product of respiration 18 of 22 What organisms respire? Al living ones 19 of 22 Write the word equation for combustion Fuel + oxygen --> carbon dioxide + water (+ energy) 20 of 22 What is threatening the balance of the carbon cycle? Burning too many fossil fuels 21 of 22 How much waste to we put in landfills each year and how much of that is organic waste? 100 million tonnes- 2/3 organic matter e.g. vegetable peelings and grass cuttings 22 of 22
B7 - B7.1 Living Organisms are Interdependent. twenty first century science 5.0 / 5 based on 6 ratings
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