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Here Is A Video That Explains Food Chains. 

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Here Is A Video That Explains Food Chains. 

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https://www.youtube.com/watch?v=MuKs9o1s8h8

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In order to have energy flow throughout an ecosystem we first need to get the energy. Now the Law of Conservation of Energy states that energy can neither be created nor destroyed so how do we get this energy. It all starts with the sun. The sun sends down chemical energy which goes in to the plant also known as the producers. The reason they are called this is because they take the chemical energy and use photosynthesis to make sugars. This energy is used by the next group called the primary consumers they take some of that energy and use it. Then a little bit goes to the secondary and so on and so on until it runs out. Then the decomposers use the energy and return the nutrients back into the ground for the producers to use.

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The way the body uses energy is through three things, cellular respiration, biomass increase, and egested waste. This is best shown using an energy efficiency diagram her it is a caterpillar. In the diagram the caterpillar initially takes in 200 J of energy. Immediately half of this is unusable so 100 J is part of the egested waste. The other half is used for cellular respiration and increasing in biomass. 67 J is used in cellular respiration and the remaining 33 J is used for biomass increase. But only the energy used in biomass increase is transferred to the next organism.

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Biomass increase is the percentage of energy used o be stored in the animal. This is also known as growing bigger. Just as when you're going thru a growth-spurt you tend to eat more because your body is using that energy from the food to grow and increase in biomass.

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Egested waste is a fancy term for your business. It is simply the things that your body cannot use and they get it out of your system as it is unhealthy to keep it in your body. Almost half of all energy you take in turns in to egested waste.

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Cellular respiration is used constantly everyday. It is when the chemicals you intake cause a reaction and make your body function. An example of cellular respiration in when you are doing a push-up. Your muscles are burning energy to keep you going. These are what we call calorie burning and once that calorie is burned it cannot be used by anything else.

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All living creatures use energy they take it in from eating plants, animals, or even both. How come so little is transferred? The reason is this. Animals use 80-95% of the energy that they take in. Meaning that only 5-20% is transferred when that animal or plant is eaten. The way animals use their energy is through cell respiration, increasing in biomass and egested waste.

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This is the most advanced of the diagrams shown so far. It is also my favorite as it really shows the energy transferred in an ecosystem. On the bottom you have the producers with 1,000 kcal but only in the primary consumers they get 10% and this trend continues throughout the whole pyramid until there is no more energy.

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The food chain is the most simplistic of the 4 charts used to show how energy flows. The food chain shows the sequential order of producers to carnivores to decomposers.

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The food web is a little more intricate as you can tell. The food web combines multiple food chains showing the energy flow throughout  the entire  ecosystem and how all the animals relate to each other. Using arrows to show the direction of energy flow. This is a good model to show how the ecosystem works.

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There is many different environments that all kinds of plant and animals live in and even though there is a vast amount of differences there is one common thing. Energy flows through all of them the exact same way. This can be modeled by  main charts used by scientist all the time. 

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There is many different environments that all kinds of plant and animals live in and even though there is a vast amount of differences there is one common thing. Energy flows through all of them the exact same way. This can be modeled by  main charts used by scientist all the time. 

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To help you understand this concept I will be using the temperate deciduous forest throughout my padlet.

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HOW ENERGY FLOWS THROUGHOUT OUR ECOSYSTEM 

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HOW ENERGY FLOWS THROUGHOUT OUR ECOSYSTEM 

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By: Andy Weston