Students will learn around food chains, pyramids, and food webs. Student will also learn how all of nature is connected and dependent on every other.

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A food chain shows just how each living thing gets the food. Some pets eat plants and also some pets eat other animals. Because that example, a straightforward food chain web links the trees and shrubs, the giraffes (that eat trees and also shrubs), and the lions (that eat the giraffes). Each attach in this chain is food because that the following link. Every food chains start with energy from the sun. This energy is captured by plants. Therefore the living part of a food chain always starts v plant life and ends with an animal.

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tree are called producers because they room able to use light energy from the sun to develop food (sugar) indigenous carbon dioxide and also water. Animals cannot do their very own food for this reason they need to eat tree and/or various other animals. Castle are called consumers. There room three groups of consumers. Animals that eat just plants are referred to as herbivores (or primary consumers). Animals that eat other animals are called carnivores. Carnivores the eat herbivores space called second consumers, and carnivores the eat various other carnivores are dubbed tertiary consumers. Animals and people that eat both animals and plants are referred to as omnivores. Then there space decomposers (bacteria, fungi, and even part worms), which feeding on disk matter. This decomposers rate up the decaying procedure that releases mineral salts earlier into the food chain for absorption by plants together nutrients.

In a food chain, power is passed indigenous one connect to another. As soon as a herbivore eats, just a fraction of the energy (that it it s okay from the plant food) becomes new body mass; the rest of the energy is lost as waste or used up by the herbivore to bring out that life processes (e.g., movement, digestion, reproduction). Therefore, once the herbivore is consumed by a carnivore, that passes only a tiny amount of full energy (that it has received) to the carnivore. The the power transferred native the herbivore come the carnivore, some power will be “wasted” or “used up” through the carnivore. The carnivore then needs to eat countless herbivores to obtain enough power to grow. Because of the huge amount of energy that is lost at each link, the amount of energy that is moved decreases each time. The more along the food chain girlfriend go, the less food (and for this reason energy) continues to be available.

Food chain can likewise be stood for in various forms such as this pyramid.

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The over energy pyramid shows many trees and also shrubs providing food and energy to giraffes. Note that together we walk up, there space fewer giraffes than trees and also shrubs and also even under lions 보다 giraffes. Together we go more along a food chain, there are fewer and also fewer consumers. In various other words, a big mass the living things at the basic is compelled to support a couple of at the top. Numerous herbivores are essential to assistance a few carnivores. Most food chains have actually no more than four or 5 links. Over there cannot it is in too numerous links in a solitary food chain since the animals at the end of the chain would not get sufficient food (and hence, energy) to remain alive.

Most pets are part of more than one food chain and also eat more than one sort of food in bespeak to fulfill their food and also energy requirements. These interconnected food chains form a food web. Food chains deserve to get complex because animals usually eat a selection of food.


Food Chains

sufficient strips of colored document so the each student has four, one on i beg your pardon to attract the sun, one on i m sorry to draw a producer, one on i beg your pardon to attract a primary consumer and one on i m sorry to draw a an additional consumer.

Food Web

empty cards fancy pencils Yarn
Carnivore:
one organism that eats largely meat Consumer: an organism, typically an animal, that feeds on plants or other animals Food chain: a succession of organisms i ordered it in together a method that each feeds on the organism listed below it in the chain and serves as a resource of food because that the organism above Food web: every the connected or attached food chains in ~ an ecological ar Herbivore: an organism that eats largely plants Predator: an animal that stays by killing and eating other pets Producer: an organism, normally a plant, the converts sunlight power into living material; normally the first step ~ above the food chain or food internet or first trophic level the a food pyramid

Cut sufficient strips of file so the each student will have actually four. Cut the yarn into pieces that will certainly connect species that connect with every other.


Food Chains

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~ above the blackboard, create the complying with headings: Producers, primary Consumers, an additional Consumers, and also Tertiary Consumers. Ask students to name some varieties under every heading. Then demonstrate how to produce a food chain, using few of the species listed.

as soon as students understand, have them draw the sun, a producer, a main consumer, a second consumer, and also a tertiary customer on each of their four strips.

These have to then be interlocked and also glued with each other to make a chain of species in i beg your pardon one eats the other. They have the right to be hung indigenous the rafters to show the diversity that food chains that exist in nature.

Food Webs

Note: This activity can be added for larger students.

Start as with food chains, putting the 3 headings top top the board. Have students name types under each heading and tell something about each species’ lifestyle. Then have actually each student pick a varieties from the board, create its name on a card, and draw a picture of it. (Check every one off the list together it’s chosen, to make sure it’s only supplied once). Then the student need to poke a hole close to the bottom the the card.

start the food net by attaching a photo of the sunlight at one side of the wall. (If you placed it top top a wall, it deserve to be saved). Have actually the students who attracted producers carry their cards up. Cave these in a horizontal line beside the sun and attach every one come the sun with a item of yarn to present the connection. Then have actually students who drew primary consumers bring their cards up. Hang these in a horizontal line over the producers.

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One at a time, comment on which producer they would certainly each consume. Connect yarn from every primary customer to the producer it would consume. (Remember that most animals eat an ext than one sort of food). The students will start to view how complicated a food internet is. Next include the second and tertiary consumer in rows over the producers. Again, discuss the connections in between primary, secondary, and tertiary consumers. Next add the scavengers: hyenas (can it is in predators as well as scavengers) and vultures. Finally, talk about decomposers—bacteria, fungi and worms that feed on the decaying matter—and their function in the food web. Students should now have a complete understanding that the intricacy of the food web. At appropriate is an instance of a food web.


All living points need power to continue to be alive. This energy comes from the sun. Plants do their food from energy from the sun. Animals get their power from the food lock eat. Pets depend on other living points for food. Some animals eat tree while others eat other animals. This pass of power from the sun to plants to pets to other animals is called a food chain.


do you recognize why there are more herbivores 보다 carnivores? how do humans fit in the food chain? What could happen if an animal not indigenous to one area is brought into the local food chain? What could happen if you eliminate an animal from the food chain? How deserve to sun and rain affect the food chain? Drought? Why is a food web a much more accurate relenten of nature than a food chain or pyramid?

1. Internet of Life

Objective:

students will recognize the ide of a food chain and also demonstrate a grassland’s food chain.

Materials:

photos of animals, river, tree, grass, sunlight A ball of yarn/spool of line

Procedure:

review The great Kapok Tree, through Lynne Cherry. Ask student to surname all the different animals that room dependent top top the one tree.

provide each participant a picture.

very first demonstrate a food chain, a simple interdependence, by linking the student v the sun card (the resource of every energy) to the student through the grass card to the student through the zebra map to the student with the lion card.

show the results of guy on the simple food chain. Man can:

reduced trees (no trees, nothing for grazers come eat, grazers will die, lions and also other predators will have nothing to eat. Lock will begin to eat our livestock.) hunt in excess (If we death the lions, there will be too numerous zebras and they will certainly need an ext grass. They will eat the grass from our pasturelands.)

Balance is key! explain that the interaction in a grasslands system are more complicated than this. Because that example, the sun provides for more than just grass, and lions don’t only eat zebras.

have the participants currently stand in a circle, the end of order (i.e. Not every one of the producer together, then the main consumers, then the secondary consumers, etc.)

give the sphere of string to the human with the sun. Climate ask that person to happen the yarn come the person with a card of one organism the the sun supports. If the sunlight supports much more than one biology in the circle, pass the string earlier to the sun and also from the sunlight to the other organism the it supports.

proceed by questioning the plants which organisms they can support and also so on.

store going v the chain till you obtain to the top consumers. The string will be a tangled internet in the middle of the circle. Food chains room complicated, and the balance they produce is essential.

Again discuss the impacts of guy on the web by having actually students drop your string if man’s influence kills off your organism. For example, the impact of overhunting will cause the lions to drop your strings. What happens?

Possible questions

carry out you understand why over there are more herbivores 보다 carnivores? What if one pet from the food chain disappeared? What about one level that the food chain? Producers? Decomposers? Herbivores? exactly how do humans fit in the food chain? What could happen if an animal not aboriginal to one area is carried into the local food chain? What could happen if you remove an pet from the food chain? How deserve to sun and rain affect the food chain? Drought? Why is a food net a much more accurate explicate of nature 보다 a food chain or pyramid?

2. Food Chain Tag

This task requires a big open area. In a class of 25 come 40 students, select three to five to be predators and seven come ten to be plant-eaters. The remainder will be plants. This represents a balanced system where plants are more plentiful than plant-eaters, plant-eaters an ext plentiful 보다 predators, and also predators are the the very least plentiful. The college student can select which plant-eaters and also predators will be in their groups. (Example: Grevy’s zebras are plant-eaters and lions are predators).

Each group selects hand-signals the will identify them indigenous the other groups. (Example: the plants may want to hold their hands out to their sides to stand for leaves, the plant-eaters (oryx) may organize their hand on the heads to stand for horns, and the predators (lions) may host their hands up favor paws v the claws showing). The predators try to tags the plant-eaters who try to tag the plants. Due to the fact that predators decompose as soon as they die and become fertilizer, the plants try to sign the predators. As soon as you room tagged, you turn into every little thing tagged you.

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~ a period of time, stop the game to view how many plants, plant-eaters, and also predators room left. Play should resume however should be stopped a couple of times before the finish to recognize what has happened and also why. After playing a couple of rounds the the game, choose one that the tree to re-enter the video game as a human. The rules for the human being are different: the human have the right to tag anyone, however no one can tag the human. Every time the human being tags someone, the player becomes another human. See just how long it takes before all players have become readjusted into humans.

talk about the changes and relationships the the video game illustrates. Some inquiries for discussion can include:

What wake up to the plants and plant-eaters if numerous of the predators have been caught? What happens to the tree if countless of them have actually been caught? What happens when people use too much of the food chain? How have the right to we keep that from happening?