<p> Name: ______1.4.6 Energy Flow Worksheet What is an ecosystem? An ecosystem is a ______with ______and their ______within ______, e.g. woodland, etc.</p><p>Energy Flow Ecosystems are unable to function unless there is a constant ______. Where does this energy come from? ______</p><p>The Sun The sun is the ______for our planet.</p><p>Energy Flow is the ______from one organism to the next in an ecosystem due to ______, e.g. along a food chain </p><p>Feeding allows ______in an ecosystem.</p><p>Energy flow in the ecosystem</p><p>Page 1 of 7 Name: ______</p><p>Food Chain Is a flow diagram that begins with a ______and shows how ______is passed through a series of ______. Each organism feeds on the one before it.</p><p>A food chain ends when there is ______.</p><p>An example of a food chain: ______ ______ ______</p><p>A Grazing food chain is one where the ______e.g.</p><p>______ grasshoppers  frogs  hawks</p><p>______ aphids  ladybirds  thrushes</p><p>______ winkles  crabs  herring gulls</p><p>______ zooplankton  copepod  herring</p><p>Grazing Food Chains</p><p>Page 2 of 7 Name: ______</p><p>A Detritus food chain is one where the chain begins with ______e.g.</p><p>______ edible crab  seagull</p><p>______ earthworms  blackbirds  hawks</p><p>Detritus Food Chain</p><p>Food Web This is a chart showing all the ______.</p><p>Constructed by showing the links between all the interconnecting food chains in the habitat. </p><p>Food Web the interconnected food chains in an ecosystem e.g.</p><p>Page 3 of 7 Name: ______</p><p>A woodland food web</p><p>Construct two food chains (4 ‘links’) from the above food web</p><p>Another food web</p><p>What is the longest food chain you can construct from this food web?</p><p>Page 4 of 7 Name: ______</p><p>Producers Producers are organisms capable of making ______, e.g. green plants. </p><p>Primary producers are the ______</p><p>Consumers Consumers are organisms that ______. They cannot ______. There are three types:</p><p>• Primary consumers – feed on ______</p><p>• Secondary consumers – feed on ______</p><p>• Tertiary consumers – feed on ______</p><p>Page 5 of 7 Name: ______</p><p>Woodland food chain Honeysuckle  aphids  ladybirds  thrushes</p><p>Primary Secondary Tertiary Producer consumer consumer consumer</p><p>Trophic Level This refers to the ______in a food chain. ______are at the 1st trophic level (T1) and ______occupy the 2nd trophic level (T2). ______that eat herbivores are at the 3rd trophic level (T3). The 4th trophic level (T4) is often occupied by the ______. </p><p>Trophic levels</p><p>Pyramid of Numbers A diagram that represents the ______at each ______in ______. Bottom layer is the ______and represents a very large number of ______The next layer ______and represents a smaller number of ______The next layer – the number of ______The uppermost layer where there may be only one ______</p><p>Page 6 of 7 Name: ______</p><p>Pyramid of Numbers</p><p>To construct a pyramid of numbers 1. Count the ______and place them at the ______2. Count each ______and include them according to their status (______or ______consumer) in the pyramid 3. The ______should include tertiary or top carnivores 4. Draw the pyramid so that the ______of each level ______to the ______</p><p>Need to know Name the sun as the primary source of energy. Name feeding as the pathway of energy flow. Present a grazing food chain. Present a food web. Construct a pyramid of numbers and explain its use.</p><p>END</p><p>Page 7 of 7</p>