Food Chains And Food Webs - Fod.infobase
Food Chains and Food WebsProgram Support Notes by:Spiro Liacos B.Ed.Produced by:VEA Pty LtdCommissioning Editor:Sandra Frerichs B.Ed, M.Ed. Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of thesesupport notes from our website for your reference.Further copying or printing must be reported toCAL as per the Copyright Act 1968.Executive Producers:Edwina Baden-Powell B.A, CVP.Sandra Frerichs B.Ed, M.Ed.Video Education Americawww.veavideo.com
Food Chains and Food WebsFor TeachersIntroductionThis program introduces students to the study of ecology and specifically to food chains and foodwebs. It opens with an explanation of why animals and plants need energy, and how these organismsobtain their energy. The concept of the food chain is introduced: plants produce their own food,herbivores eat plants and then carnivores eat the herbivores. Numerous examples are given. Usingthe example of an ecosystem on the African plains, the program then explores food webs, beforefinishing with the role of scavengers and decomposers in the recycling of nutrients and organic matterwithin the 00:12:0500:15:2500:16:04The need for energyFood chainsProducers and consumersFood websDecomposers and scavengersCreditsEnd programRelated TitlesClassification SystemsRecommended tic.com/activities/explorer/ecosystems/be an explorer/map/foodweb play.htmhttp://www.vtaide.com/png/foodchains.htm2 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food WebsStudent WorksheetInitiate Prior Learning1. What are some of the things humans rely on to survive?2. What do animals need to survive?3. What do plants need to survive?4. Why do we eat food?5. How do plants get energy to grow if they don’t eat food?6. Can you think of an animal that eats plants and then itself gets eaten by another animal?3 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food WebsActive Viewing Guide1. Write down four examples of how animals use energy.2. How do animals obtain their energy?3. Fill in the table.Type ofAnimalBrief DefinitionThree ExamplesCarnivoreHerbivoreOmnivore4. What does an ecologist do?4 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food Webs5. Write down the food chain involving grass, lions and Zebras.6. What does the food chain show?7. What does the arrow in the food chain mean?8. In the food chain grass grasshopper toad snake eagle, what could happen if all theeagles were hunted to extinction?9. How does a plant obtain its food?10. Draw a food pyramid based on the food chain in Question 8.5 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food Webs11. Label the animals in the food chain as first-order consumers, second-order consumers and so on.grass grasshopper toad snake eagle(Producer)12. In ecology, why are plants called producers?13. What is a food web?14. What is a scavenger? Give three examples.15. What happens to the body of a dead animal if it is not eaten?6 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food WebsExtension Activities1. What would happen if the sun’s light was blocked for a year (say, due to a huge meteor hitting theearth and creating a massive dust cloud)?2. What might happen if all the carnivores on Earth suddenly disappeared?3. What might happen if all the decomposers on Earth suddenly disappeared?4. What might happen if all the herbivores on Earth suddenly disappeared?7 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food Webs5. There are a lot fewer lions than zebras. Why?6. Consider a simple ecosystem consisting only of grass, insects and birds. A simple food chain torepresent the passage of food would be written as follows:grass insects birds.If an animal like a cane toad (which mostly eats insects) is introduced into this ecosystem, whatmight happen to the amount of grass, insects and birds?8 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food WebsSuggested Student ResponsesInitiate Prior Learning1. What are some of the things humans rely on to survive?Answers will vary, but may include food, air, shelter, clothing, a place to live, a job, water.2. What do animals need to survive?Answers will vary, but may include food, air, shelter, water. As a species, they need tomate.3. What do plants need to survive?Answers will vary, but may include water, sunlight, carbon dioxide, air (oxygen), nutrients.4. Why do we eat food?Answers will vary, but may include to obtain energy, to obtain the chemical building blocksthat make up our bodies.5. How do plants get energy to grow if they don’t eat food?Using the energy of sunlight, they produce their own food called glucose (C 6H12O6) byjoining carbon dioxide molecules (CO 2) to water molecules (H2O). They use the glucose forenergy, but they then also join glucose molecules together to produce the other chemicalsthat make up all the different parts of the plant.6. Can you think of an animal that eats plants and then itself gets eaten by another animal?Answers will vary, as there are many examples, e.g. caterpillars, many insects, zebras,small fish, deer, wombats.9 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food WebsActive Viewing Guide1. Write down four examples of how animals use energy.Answers will vary, but may include, find food, find water, build a nest, find a mate, evadecapture by a predator, sustain life processes like pumping blood and producing new cellsand chemicals within the body.2. How do animals obtain their energy?By eating food.3. Fill in the table.Type ofAnimalCarnivoreHerbivoreOmnivoreBrief DefinitionThree ExamplesMeat eaterTigers, wolves, lions, snakes, andfrogsPlant eaterKangaroos, giraffes, deer, rabbits andrhinocerosesMeat and plant eater (Omni meanseverything)Bears, chickens, crows, pigs andhumans4. What does an ecologist do?Studies ecosystems and the way plants and animals interact within an ecosystem.5. Write down the food chain involving grass, lions and zebras.grass zebra lion6. What does the food chain show?The grass is eaten by the zebra and the zebra is eaten by the lion.7. What does the arrow in the food chain mean?“Is eaten by”8. In the food chain grass grasshopper toad snake eagle, what could happen if all theeagles were hunted to extinction?The snake numbers may increase for a little while because they would no longer be gettingeaten by the eagles, but they might end up eating all the toads which would mean that theyhave no food left, resulting in their own demise. Only grasshoppers would be left, whichwould then increase to plague proportions.9. How does a plant obtain its food?They produce their own food called glucose (C 6H12O6) by joining carbon dioxide molecules(CO2) to water molecules (H2O). This process requires light energy from the sun. The plantsuse the glucose for energy, but they then also join glucose molecules together to producethe other chemicals that make up all the different parts of the plant.10 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food Webs10. Draw a food pyramid based on the food chain in Question 8.EagleSnakeToadsGrasshopperGrass11. Label the animals in the food chain as first-order consumers, second-order consumers and so on.Grass grasshopper toad snake eaglestndrdth(Producer)1 -order2 -order3 -order4 -order12. In ecology, why are plants called producers?They produce their own food—glucose—by joining carbon dioxide and water moleculestogether.13. What is a food web?A chart or diagram that shows lots of interconnected food chains. Most animals rely onmore than one food source or are eaten by more than one predator, so a food web showsall the paths that food is passed along within an ecosystem.14. What is a scavenger? Give three examples.A scavenger eats dead animals which it finds already dead (although hunting carnivoreslike eagles and lions will also scavenge if they happen to come across a dead animal). Rats,vultures, seagulls, jackals, Californian condors, sharks, and lions, are all examples.15. What happens to the body of a dead animal if it is not eaten?It decomposes. Tiny bacteria consume the body and many of the nutrients which thebacteria don’t need return to the soil and are absorbed by the plants.11 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
Food Chains and Food WebsExtension Activities1. What would happen if the sun’s light was blocked for a year (say, due to a huge meteor hitting theearth and creating a massive dust cloud)?The plants would stop growing. Without plants many animals would die. A meteor that hitthe Earth 65 million years ago is believed to be the cause of the extinction of the dinosaurs(and about 90% of every other type of animal and plant that was alive during the time that ithit).2. What might happen if all the carnivores on Earth suddenly disappeared?The herbivores would increase in numbers, eat all the available plant material, and then,when there is no more plant material, die out. However, would plants grow at a faster ratethan the rate at which all the herbivores could eat? It seems unlikely; imagine all thebillions of insects, let alone every other herbivore, munching away at trees and grasses andshrubs.3. What might happen if all the decomposers on Earth suddenly disappeared?There are many possibilities. When an animal died, its meat would stay fresh and manysmaller scavengers would thrive. Smaller animals like insects would be eaten by largeranimals. However, the excrement from all these animals would probably build up and thereturn of nutrients to the soil would almost cease, resulting in the slowing of (and possiblythe stopping of) the growth of plants.4. What might happen if all the herbivores on Earth suddenly disappeared?The carnivores would die out and the plants would thrive.(The answers to the above questions are speculative of course. Students may argue thatthe presence of omnivores will affect the outcomes.)5. There are a lot fewer lions than zebras. Why?There simply isn’t enough energy. The only source of energy for lions is in the animals theyeat, so a large population of (in this case zebras) is needed to provide the energy needs ofthe lion.6. Consider a simple ecosystem consisting only of grass, insects and birds. A simple food chain torepresent the passage of food would be written as follows:grass insects birds.If an animal like a cane toad (which mostly eats insects) is introduced into this ecosystem, whatmight happen to the amount of grass, insects and birds?The cane toad will eat many of the insects that the birds used to eat, so fewer birds willsurvive. The cane toad is a really good case study of what can happen if an ecosystem isupset by the introduction of a new species.12 Video Education Australasia Pty Ltd 2012Reproducing these support notesYou may download and print one copy of these support notes from our website for your reference.Further copying or printing must be reported to CAL as per the Copyright Act 1968.
finishing with the role of scavengers and decomposers in the recycling of nutrients and organic matter within the ecosystem. Timeline 00:00:00 The need for energy 00:03:12 Food chains 00:06:14 Producers and consumers 00:09:57 Food webs 00:12:05 Decomposers and scavengers 00:15:25 Credits 00:16:04 End program Related Titles
Apr 07, 2020 · Food Webs and Food Chains Worksheet 1 Look at this food chain. lettuce greenfly ladybird thrush cat a What does the arrow mean in a food chain? b Name the producer in the food chain c Name the third trophic level in the food chain. d Name the tertiary consumer in the food chain. e What is the ultimate source of energy that drives the food chain?
2. Students complete section 2 of the Ecosystems Worksheet. Main Activity – part two Food Chains and Food Webs Description This is a teacher-led discussion, on food chains and food webs. Students will observe food chains being created, they will then answer questions on the Food
Our native Niagara Fox protocol will work between the WEBs-AX and WEBs-N4 software systems, and the WEBs-N4 software will work with any currently available WEBs hardware. For those making the conversion to our most up-to-date products, a station conversion tool is available that will adapt WEBs-AX
2. What is the main idea of the passage? a. Every organism needs energy to live. b. Food chains are an important tool for understanding the relationships between animals. c. Food chains, food webs, and energy pyramids are used to describe the transfer of energy through different organisms. d. Producers make their own energy. 3.
A food web contains food chains, and can be described as a series of food chains. It is possible to calculate the average length, or the maximum length, of all the individual food chains contained within a given food web, and these are frequently used metrics of food web structure.
chain consists of plates; pins and bushes made of high-grade steel. There are hoisting chains and pulling chains apart from the power transmitting chains. Roller chains and silent/inverted chains are the different types of power transmitting chains. GEAR DRIVES: -Toothed whe
34 Web of Life A5: Food Chains and Webs. Food chains and webs show the transfer of chemical energy in an ecosystem. 50 Tropical Trophic Tiers A6: Energy Pyramid. Scientists show energy transfers from the sun to producers to consumers with trophic levels.
Abrasive jet Machining consists of 1. Gas propulsion system 2. Abrasive feeder 3. Machining Chamber 4. AJM Nozzle 5. Abrasives Gas Propulsion System Supplies clean and dry air. Air, Nitrogen and carbon dioxide to propel the abrasive particles. Gas may be supplied either from a compressor or a cylinder. In case of a compressor, air filter cum drier should be used to avoid water or oil .
