food webs
DESCRIPTION
this is just my homeworkTRANSCRIPT
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FOOD WEBS
L.O: LEARN WHAT FOOD CHAINS ARE
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INTRODUCTION TO FOOD CHAINS
• All living things need food for survival.
• A food chain shows how plants, animals and humans rely on each other for food.
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ANIMALS AND PLANTS ARE LINKED BY FOOD CHAINS
Animals get energy and nutrients by eating other animals or plants.
For example
• caterpillars eat leaves
• mice eat caterpillars
• owls eat mice
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LINKS BETWEEN FOOD CHAINS
These links between animals and plants are called food chains.
The arrow means 'is eaten by'.
Nearly all food chains start with a green plant.
Most animals and plants are part of more than one food chain.
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HOW AN ANIMALS EXTINCTION AFFECT OTHER IN THE FOOD CHAIN
If one part of a food chain alters, the whole food chain is affected. For example, if a disease suddenly wiped out caterpillars, it would affect mice, owls and many other animals.
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CONSUMERS
Animals are called consumers because they eat other plants and animals.
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PRODUCERS
Plants are called producers because they make their own food. They are at the start of a food chain.
Plants get their energy from the Sun.
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PREY AND PREDATORS
A predator is an animal that eats other animals.
The animals that predators eat are called prey.
Predators are found at the end of a food chain.