Biomass and cycles 0.0 / 5 ? BiologyDecompositionGCSEAQA Created by: HeatherCreated on: 27-05-14 20:00 What is a pyramid of biomass? It reveals the mass of a living material at each stage in a chian, 1 of 20 What does the amount of material and energy do at each stage? It decreases at each stage, 2 of 20 What do the arrows show? They point in the direction of energy flow so from food to feeder 3 of 20 What is the ultimate source of energy for living things? Radiation from the sun, 4 of 20 What organisms i9n the food chain absorb the sun's light for energy and how? Green plants and aldae during photosynthesis-the energy is stored in the substances that make up the cells of the plants 5 of 20 What is the definition of producer? -Green plants and algae and they make food by photosynthesis, 6 of 20 What are primary consumers? These are usually herbivores which eat the plant materials, 7 of 20 What are secondary consumers? They are usually carnivores that eat animal material, 8 of 20 What are predators? They kill for food and are either secondary ot tertiary consumers, 9 of 20 What are scavengers? Thye feed on dead animals, 10 of 20 What are decomposers? They feed on dead and decaying organisms and on undigested parts of plant and animal matter in faeces, 11 of 20 What is the available energy in each stage used for/lost? for growth and production of offspring, keeping a constant temperature, respiration for ,movement, lost in faeces, 12 of 20 What does biomass mean? Does it decrease? The mass of living material at a stage in a food chain which decreases from one stage to another, 13 of 20 In the pyramid of biomass, what do the bars do as you reach the top? They become narrower, 14 of 20 Why is decay important? it is an essential life process that digests food or waste matter and recycl 15 of 20 How do microorganisms cause decay? By releasing enzymes that break down compounds to be absorbed by cells, 16 of 20 What are the two main groups of decomposers? bacteria and fungi, 17 of 20 What are the three factors that affect decay? -Moisture, -Temperature, -Amount of oxygen, 18 of 20 How is carbon dioxide removed from the atmosphere? Green plants and algae remove carbon dioxide from the atmosphere by photosynthis, -Absorber into seas and lakes, -locked in sedimentary rocks, 19 of 20 How is carbon dioxie returned to the atmosphere? -Respiration of aniamls and plants, -In combustion of fossil fuels or wood etc, -Decomposition of dead matter, 20 of 20
Comments
No comments have yet been made