Essay on food chains and webs

Here is your free essay on Food Chains Tabasum Advertisements: Anything which we eat to live is called food. The food or energy can be transferred from one organism to the other through food chains. The starting point of a food chain is a category of organisms called producers.

Essay on food chains and webs

Free Essays Must Be Free! Waste no more time! A food chain is an idea developed by a scientist named Charles Elton in He described the way plants get energy from sunlight, plant-eating animals get their energy from eating plants, and meat-eating animals get their energy from eating other animals.

The idea of a chain means that all these animals are linked together, so anything that affects one link in the chain affects everything in the chain. For all life on earth there is only one available source of energy, the sun.

Furthermore, only plants can change this energy into a form that can be used by animals. All plants rely either directly or indirectly on plants for their energy. Plants feed upon sunlight.


Only plants have the ability to convert sunlight into food that they and animals can use. Feeding levels are also called trophic levels. The word "trophic" is a Greek word for nourishment.

To determine the trophic level, we count the number of energy transfers. Green plants are at the first trophic, or nourishment, level because there has been one transfer of energy, from the sun to the plants.

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The first link in the chain, the plant, is called the producer, while all the links above it are called consumers. For example, look at a simple chain in which grass uses sunlight to produce sugars and proteins so it can grow.

Essay on food chains and webs

Rabbits eat the grass, and get energy from it. Foxes eat rabbits and get energy from them. Nothing eats foxes, so they are said to be at the top of that particular food chain. If something happens to the grass, suppose a farmer plows up some of the grass to plant a field.

Then the rabbits have less food and some of them will die. Of course, in the real world, there are no simple food chains like this. Rabbits eat many things besides grass, and foxes eat many things besides rabbits and other things also eat grass and rabbits.SCIENCE Science and the Environment 4th Grade FOOD CHAINS Overview: All organisms, or living things, depend on other organisms for nutrients.

The movement Food chains and food webs illustrate who eats whom in a given community. Food chains also represent the dependence of.

You can create printable tests and worksheets from these Grade 3 Food Chains and Webs questions! Select one or more questions using the checkboxes above each question. Food Chains and Food Webs A food chain is a pathway that represents the exchange of energy from one organism to another. In other words, it is the chronological order of who eats whom in a.

Food Chains and Webs "What's for dinner?" Every organism needs to obtain energy in order to live. For example, plants get energy from the sun, some animals eat plants, and some animals eat other animals. Use this diagram of a food web to answer questions 1 through 5.

have the coyotes rats insects roadrunners lizards bacteria cacti shrubs 4. 1. In which biome is this food web most likely to be found?

Food Chain: Useful Essay on Food Chain ( Words)

A forest B desert C grassland D urban begins the flow of energy through the 2. .

Food Chains and Webs Essays: Over , Food Chains and Webs Essays, Food Chains and Webs Term Papers, Food Chains and Webs Research Paper, Book Reports. ESSAYS, term and research papers available for UNLIMITED access. A Food Web is something that shows the energy from an animal flowing in to something such as an start a Food Web you have to have an enery source such as the Sun. Food webs may look complex but there not. the Food Web shows animals and . The Food Chain Instruction Plan The Food Chain Gang Buff Kahn Maureen Larson Caren Norris Brenda Young University of Maryland LBSC No prior knowledge of food chains or webs II. Physiological Characteristics a. Sensory perception No issues b. General health One student is ADHD c. Age 1. 4th grade 2.

All food chains in a community constitute a food web. A food web is simply the total set of feeding relationship amongst and between the species com­posing a biotic community.

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Food Chain- Ideas for Teaching, Resources for Lesson Plans, and Activities for Unit Planning