Explain how energy flows through the food chain and how it is lost to the environment.[ 8 marks]
Sample Answer:
- Energy flows through the food chain in one direction [ 1 mark]
- In the food chain, the plant is the producer, the rat is the primary consumer, the snake is the secondary consumer and the eagle is the tertiary consumer. [ 2 marks] // In the food chain, the plant is the producer, the earthworm is the primary consumer, the bird is the secondary consumer and the snake/ eagle is the tertiary consumer.
- Each level of food chain is called a trophic level. [ 1 mark ]
- Energy is transferred from one trophic level to another trophic level [ 1 mark ]
- When energy is transferred from one trophic level to another level as much as 90% of the chemical energy in the food consumed by primary consumer is used for its metabolic activities and lost as heat ` [ 2 marks ]
- Only 10% of the energy in an organism is passed on to the organism at the next trophic level [ 1 mark ]
- In the food chain, the plant is the producer, the rat is the primary consumer, the snake is the secondary consumer and the eagle is the tertiary consumer. [ 2 marks] // In the food chain, the plant is the producer, the earthworm is the primary consumer, the bird is the secondary consumer and the snake/ eagle is the tertiary consumer.
- Each level of food chain is called a trophic level. [ 1 mark ]
- Energy is transferred from one trophic level to another trophic level [ 1 mark ]
- When energy is transferred from one trophic level to another level as much as 90% of the chemical energy in the food consumed by primary consumer is used for its metabolic activities and lost as heat ` [ 2 marks ]
- Only 10% of the energy in an organism is passed on to the organism at the next trophic level [ 1 mark ]
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