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Revision for Key area 3.1 Energy in Ecosystems

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Question
Answer
What do the arrows represent in a food chain?   The flow of energy  
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State two ways energy is lost from a food chain   Undigested materials, Heat, Movement  
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How much energy is lost from a food chain?   90%  
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How much energy is passed from one level of a food chain to another?   10%  
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What is the energy that is passed through the food chain used for?   Growth  
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Name the type of pyramid which shows the number of organisms (the population) in each level of a food chain.   Pyramid of Numbers  
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Name the type of pyramid which shows the energy in each population of a food chain   Pyramid of Energy  
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Describe the trend of a pyramid of numbers   As you move up a food chain the numbers decrease and the individual size increases  
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Describe the trend of a pyramid of energy   As you move up a food chain the energy decreases  
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