The role or job that an organism plays in its habitat. How an organism makes a living.
A model of where organisms get their energy from.
An organism that makes it own food through photosynthesis. It gets its energy from the sun.
An organism that gets its energy from eating other organisms.
An organism that lives in the soil and breaks down decayed matter like dead plants and animals. Examples include bacteria and earthworms.
An organism that eats only plants
An organism that eats only meat
An animal that eats both plants and animals.
A group of organisms of the same kind that live in the same area. Populations can increase or decrease in number.
A contest between organisms to survive.
To survive and reproduce.
When a species (single type of organism) is in danger of becoming extinct.
The way plants make food and oxygen from sunlight, water, and carbon-dioxide
carbon dioxide - oxygen cycle
The pattern of plants using carbon-dioxide to make oxygen and animals breathing in oxygen to make carbon-dioxide
Where an animal lives. Examples include: tree trunk, lake
Activity that is harmful to the environment.
Destroying vegetation / grassland by having too many animals graze on it.