An organism that can make its own food
A leafy roof formed by tall trees

A pattern of overlapping food chains in an ecosystem
Trees that sshed thier leaves and grow new ones every year

The continous process in which water moves from the Earth's surface to the atmosphere and back

Bumps on the roots of certain plants that house nitrogen-fixing bacteria
A layer of shorter plants that greow in the shade of a canopy

The movement of organis from one place to another
The area between the high and low tide line

eats both plants and animals

Consumer that eats only plant

The process in which water in the form of vapor becomes a liquid

The study of where organisms live

The average tempurature in an area over a long period of time

A series of events in which one organism eats another
An area with less than 25cm of precipitation a year

An animal that breaks down waste and dead organisms
Trees that prodyse thier seeds in cones and have pointy leaves

The process of changing free nitrogen gas into a usable form
The region of shallow water over the continental shelf

Species that have naturally evolved in an area
An area populated by grass that get 25 to 75cm of precipitation a year

A group of ecosystems with similar climates and organisms
An extremely cold, dry biome

An organism that consumes obtains energy by eating another

A diagram that shows the amount of energy that moves from one feeding level to another food web

when water changes from liquid to vapor

The very slow motion of the continents

A grassland close to the equator

An animal that eats dead animals

Consumer that eats only animals

Rain, snow, sleet, or hail

Species that are carried to a new place by people

Soil that is frozen all year