Biology: Chapter 5 0.0 / 5 ? BiologyBiomassEnergy flow through ecosystemsCarbon cycleGCSEAQA Created by: rebeccamariaCreated on: 03-05-15 12:01 What does the word biomass mean? The mass of living material 1 of 13 What is a trophic level The levels of a food chain 2 of 13 Why do most food chain have no more than five trophic levels? Because a lot of energy and biomass is lost at each stage 3 of 13 What does the bottom of the pyramid always represent? (Trophic levels) It always represents the producer (a plant) 4 of 13 How is energy lost in the food chain? It is lost by waste products (faeces and urine) 5 of 13 Why do things decay? Materials decay because they are broken down (digested) by microorganis 6 of 13 What three conditions do micro-organisms work best at? They work best when there is moisture, warmth and plenty of oxygen 7 of 13 What are decomposers? Decomposers are organisms that break down dead or decaying organisms 8 of 13 Name a decomposer? Bacteria or fungi 9 of 13 What is the carbon cycle in nature? The constant cycle of carbon in nature is known as the carbon cycle 10 of 13 Which processes removes carbon dioxide from the? Carbon dioxide is removed from the atmosphere by photosynthesis 11 of 13 Which process returns the carbon dioxide to atmosphere? It is returned to the atmosphere through respiration and combustion 12 of 13 Name the process that releases carbon dioxide from fossil fuels? Combustion / buring 13 of 13
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