Revision for Key area 3.1 Energy in Ecosystems
Help!
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| 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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