Ecology
100

The primary source of energy for most life on Earth.

What is the sun?

200

A specific step or level in a food chain or food web.

What is a Trophic Level?

300

The specific physical area or environment where an organism lives.

What is a habitat?

400

Consists of two or more interconnecting chains.

What is a food chain?

500

The study of how organisms interact with one another and with their physical environment.

What is Ecology?