MAKE A MODEL OF A HABITAT: STUDY HOW ANIMALS AND PLANTS ADAPT

     

An ecosystem is made up of all the living animals và plants & the non-living matter in a particular place, lượt thích a forest or lake. All the living things in an ecosystem depend on all the other things - living & non-living for continued survival - for food supplies and other needs.

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In some ways, the actions và reaction that take place within an ecosystem are lượt thích a spider thuocmaxman.vn - when one strand is broken, the thuocmaxman.vnsite starts to lớn unravel. What affects one part of an ecosystem, affects the whole in some way.

The idea of the thuocmaxman.vn of life is shown by the interdependence within an ecosystem. Animals and plants depend on a complex system of food for survival. In a typical prairie ecosystem, the thuocmaxman.vn might work like this: The sun provides energy for the grass; grasshoppers feed on the grass; birds and frogs eat the grasshoppers; snakes eat birds, frogs và mice; owls và hawks will eat the birds as well as snakes, frogs and mice. When an animal dies, it is decomposed by worms, fungi & bacteria kích hoạt and nutrients are released to the soil during the decaying process for the grass to use again. Connecting the many plants và animals with lines representing their functions & food chains within this thuocmaxman.vnsite would create a tangled maze. It is obvious that all forms of life in the ecosystem are dependent on all other living and non-living things for food, nutrients và energy.

ObjectiveStudents will understand that an animal's needs determine its preferred habitat.Students will understand the concept of ecosystems & interdependence.Students will understand that interrelating communities are components of an ecosystem.Activities

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Demonstrate the concept of interdependence to students by setting up a row of dominos with enough space between one section that will allow a chain reaction to lớn stop at that point after the first has been pushed. And/or use play blocks phối up in a shape of a pyramid; ask students lớn remove several blocks. Every block removed causes a change in the structure--some reactions are more severe than others; for instance, if a bottom or center block are pulled, the system collapses.

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Go outside & mark off a large area. A field with diverse vegetation is best. Divide the area into sections using a measuring tape. Have students maps the area by observing và identifying animals (insects, birds, signs) and noting their location. Compare the different animals by their locations.

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Are there differences?What are they?Why?

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Group students into teams. Go outside và identify distinctly different vegetative areas, such as a lawn, woods, and mở cửa field, marsh, or a pond. Assign a team to lớn each area or ecosystem. Using sweep nets, dip nets, magnifying lenses, egg cartons, trowels, pans & plastic bags, collect plant & insect specimens from each area. Minimize the impact by keeping animals live & taking only parts of plants, such as a leaf. Record or draw pictures of plants or animals that are not collectible.

After collecting samples and data, regroup for comparison of the areas. Are there differences? Similarities? What và why? Identify your specimens as khổng lồ what they bởi in their ecosystem.

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Cut out or draw pictures of plants và animals that exemplify or show a food chain. Paste these on cardboard và assemble a food chain mobile(s). Include people as part of the food chain, if you like. For example: sun, grass, grasshoppers--grass, birds, frogs, grasshoppers, snakes--birds, snakes, frogs, mice, và so on.

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Make several signs representing many of the components of an ecosystem. Include animals, plants, soil, water và the sun. Several animals and plants that are part of an interconnecting food chain should be worked out before hand. Students should pick a sign và wear it by using a string around the neck. Have them sit in a circle facing each other. Next, connect all the components (students) that are related to each other in an ascending order by having them take hold of the string one at a time, thereby weaving a thuocmaxman.vn, The thuocmaxman.vnsite of Life. The thuocmaxman.vn should be complicated by the time they are finished.

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After everyone is "connected" ask one essential component to lớn drop the string. This represents elimination from the system. Any other related components should also drop the string.

What happens khổng lồ the system? Discuss the concept of interrelationships within ecosystems. How vì chưng people help keep, or not keep the system in balance?