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https://www.youtube.com/watch?v=-oVavgmveyY

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http://coolclassroom.org/cool_windows/home.html

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https://www.youtube.com/watch?v=Vtb3I8Vzlfg

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https://www.youtube.com/watch?v=iWfEn8J5xKM

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http://www.sheppardsoftware.com/content/animals/kidscorner/games/foodchaingame.htm

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Carnivores and Top PredatorsCarnivores are animals that only feed on other animals. These are also known as the top predators as they are at the highest point of the food chain. Top predators have a little or no enemies. They usually consume all lower levels and are not consumed by any other animals until they die. Lions, tigers, crocodiles, eagles are the best examples for top predators.

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Carnivores and Top PredatorsCarnivores are animals that only feed on other animals. These are also known as the top predators as they are at the highest point of the food chain. Top predators have a little or no enemies. They usually consume all lower levels and are not consumed by any other animals until they die. Lions, tigers, crocodiles, eagles are the best examples for top predators.

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What are herbivores?

Herbivores are animals that only feed on plants.
What are omnivores?

Omnivores are animals that eat a variety of food of both plant and animal origin.

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Primary producers (usually plants and other photosynthesizes) are the gateway for energy to enter food webs.

Productivity is the rate at which energy is added to the bodies of a group of organisms (such as primary producers) in the form of biomass.

Gross productivity is the overall rate of energy capture. Net productivity is lower, adjusted for energy used by organisms in respiration/metabolism.

Energy transfer between trophic levels is inefficient. Only \sim10\%∼10% of the net productivity of one level ends up as net productivity at the next level.

Ecological pyramids are visual representations of energy flow, biomass accumulation, and number of individuals at different trophic levels.