The document defines key terms related to organisms and ecology, including organism, producer, decomposer, consumer, scavenger, carnivore, herbivore, omnivore, community, population, affect vs effect, food chain, food web, and bioaccumulation. It provides examples for each term and explains producers make their own food through photosynthesis, decomposers break down dead organisms, consumers eat other organisms or their byproducts, and herbivores eat plants while carnivores eat animals and omnivores eat both. Food chains demonstrate energy transfer between organisms and food webs combine multiple chains in an ecosystem. Bioaccumulation occurs when substances build up in an organism over time.

1. ORGANISM
A living thing.
Bacteria, plants, animals, and insects
are all organisms.

2. PRODUCER
Organisms that are able to make their
own food.
Plants are producers because they use
photosynthesis to make sugar as their
food.

3. DECOMPOSER
Organisms that process dead
organisms and release nutrients into
the environment.
Fungi and bacteria are decomposers
because they process dead plants and
animals.

4. CONSUMER
Organisms that cannot make their own
food and must eat other organisms.
All organisms that are not producers
and decomposers are consumers.

5. SCAVENGER
An organism that eats only dead or
rotting organisms.
Vultures, flies, and raccoons are
commonly classified as scavengers.

6. CARNIVORE
An animal that only eats other
animals.
Dogs, cats, spiders, and birds are
carnivores.

7. HERBIVORE
An organism that only eats plants.
Goats, sheep, and cows are examples
of herbivores.

8. OMNIVORE
An animal that can eat both plants and
other animals.
Humans as well as other apes like
gorillas and chimpanzees are
omnivores.

9. COMMUNITY
All the organisms living in one area.
Humans and trees make up the
community of International School
Manila.

10. POPULATION
One type of organism living in an
Ecosystem
Trees are one population of living
things found in the forest.

11. AFFECT (VERB) / EFFECT (NOUN)
Affect: To produce a change in
something or someone.
Effect: The change brought about by a
force.
Eating a lot of meat affects your
cardiovascular system and the effect is
that your blood vessels harden.

12. FOOD CHAIN
A sequence that shows the transfer of
energy and nutrients between
producers and consumers.
Grass  Cow  Human is an example
of a food chain.

13. FOOD WEB
 A food web consists of all the food
chains in a single ecosystem.
Food webs connect
many different food
chains.

14. BIOACCUMULATION
When substances build up in an
organism faster than they can be
released.
Eating and drinking contaminated food
and water can result in fatal
bioaccumulation.