Living Environment Translated English 2014 | Page 32
Plants release oxygen (O2), glucose ( C6H12O6)
and water as products of photosynthesis.
Consumers cannot make food. They obtain energy by
eating producers or other consumers.
o Herbivores are consumers that eat only plants.
o Carnivores are consumers that eat only animal
matter.
o Omnivores are consumers that eat both plant and
animal matter.
o Decomposers break down dead and decaying
matter.
o Detritivores are organisms that eat dead organic
matter.
o Decomposers are detritivores that break down dead
and decaying matter into simple compounds.
Matter can be recycled, but energy cannot.
A food chain models the feeding relationships between
species. These show how matter and energy pass from one
organisms to another.
A food web is a model that shows the complex network of
feeding relationships within an ecosystem.
A energy pyramid is a diagram that compares energy used
by producers, primary consumers, secondary consumers,
and tertiary consumers.
o Tropic levels are the levels of nourishment in an
area.
o Producers are the largest energy level in an energy
pyramid.
o Primary consumers are herbivores because they are
the first consumer above the producer level.
o Secondary consumers are carnivores that eat
herbivores.