Ecosystem Basics
Relationships in Nature
Energy Flow
Cycles and Systems
Changes over Time
100

The living parts of an ecosystem, like animals and plants.

What is biotic?

100

A relationship where both species benefit.

What is mutualism?

100

An organism that makes its own food using sunlight.

What is a producer?

100

A diagram that shows one path of energy from producers to consumers.

What is a food chain?

100

The gradual change in ecosystems over time.

What is succession?

200

The non-living parts of an ecosystem, like sunlight, air, and rocks.

What is abiotic?

200

A relationship where one species benefits and the other is harmed.

What is parasitism?

200

An organism that eats other organisms for energy.

What is a consumer?

200

A complex diagram showing many connected food chains.

What is a food web?

200

The first type of succession, which begins on bare rock.

What is primary succession?

300

A group of organisms of the same kind that can reproduce together.

What is a species?

300

A relationship where one species benefits and the other is not affected.

What is commensalism?

300

A consumer that eats only plants.

What is a herbivore?

300

The process by which water moves through the environment in different forms.

What is the water cycle?

300

The type of succession that happens after a fire or flood.

What is secondary succession?

400

These are what all organisms need to survive—like food, water, and shelter.

What are basic needs?

400

A relationship where one organism hunts and eats another.

What is predation?

400

A consumer that eats both plants and animals.

What is an omnivore?

400

The cycle where carbon moves through the air, plants, animals, and soil.

What is the carbon cycle?

400

The first organisms to grow in a new or barren ecosystem.

What are pioneer species?

500

A large system made of biotic and abiotic parts interacting in a specific area.

What is an ecosystem?

500

The general term for any long-term interaction between species.

What is symbiosis?

500

An organism that breaks down dead material and returns nutrients to the soil.

What is a decomposer?

500

An organism that eats dead animals but doesn’t decompose them.

What is a scavenger?

500

A stable and mature ecosystem that no longer changes quickly.

What is a climax community?

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