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Key Area 3.4
Revision for Key area 3.1 Energy in Ecosystems
Question | Answer |
---|---|
What do the arrows represent in a food chain? | The flow of energy |
State two ways energy is lost from a food chain | Undigested materials, Heat, Movement |
How much energy is lost from a food chain? | 90% |
How much energy is passed from one level of a food chain to another? | 10% |
What is the energy that is passed through the food chain used for? | Growth |
Name the type of pyramid which shows the number of organisms (the population) in each level of a food chain. | Pyramid of Numbers |
Name the type of pyramid which shows the energy in each population of a food chain | Pyramid of Energy |
Describe the trend of a pyramid of numbers | As you move up a food chain the numbers decrease and the individual size increases |
Describe the trend of a pyramid of energy | As you move up a food chain the energy decreases |