Transcript FOOD WEBS
• A habitat is an environment that meets the
needs of an organism
• A producer is a living thing, such as a
plant, that makes its own food
• A consumer is a living thing that eats other
living things for energy
• A decomposer is a living thing that feeds
on the wastes of plants and animals or on
their remains after they die
• An organism’s niche includes all the ways
it meets its basic needs – how it gets
shelter, how it produces young, and how it
gets food and water.
The sun is the main source of energy for
ALL living things.
Animals don’t get energy directly from the
Many animals eat plants, however, which
use sunlight to make food.
Animals that don’t eat plants still depend on
the energy of sunlight. They eat animals
that eat plants.
• Food chains are used to describe the way
energy moves through ecosystems.
Food Chains have three levels:
• Producers → plants (make own energy)
• Consumers → eat other living things for
• Decomposers → feed on the wastes of
plants and animals or their remains
Food Chains are used to study how
larger species are fed.
The arrows in a food chain show how the energy is transferred.
The fox eats rabbits. The rabbit eats plants. The plants get their food by
photosynthesis which begins with sunlight.
Think of a food chain as one
specific route to get from point A
to point B; like from the
classroom to the cafeteria.
All organisms in an ecosystem
need energy from food to live.
An energy pyramid shows how
much food energy is passed
from one organism to another
long a food chain.
Some habitats overlap. When
they do, similar organisms may
compete for the same food or
Two species of fish living in the same pond may compete for
the same insects as food.
Organisms that are very different
may not need to compete.
Birds and caterpillars live in the same habitat, but they meet their
needs in different ways.
A food web is a diagram that
shows how food chains connect
In a food chain and in a food
web energy begins with the sun.