Bacteria: Very tiny (microscopic) living things that are found everywhere. Some bacteria do useful things, some bacteria can cause disease.

Barbel:A slender, whiskerlike organ extending from the head or chin of certain fishes.

Bark: The tough, corky, outer skin that covers tree trunks, branches and twigs.

Biodegradable: The property of a substance that permits it to be broken down by bacteria and other microorganisms into simple, stable products that will not harm the environment.

Biodiversity: The variety of life on Earth. "Bio" means life and "diversity" means difference.

Biological control: the use of natural enemies (predators, parasites, etc…) to control a pest population.

Biologist: A person who studies living organisms and their relationships to one another.

Biology: The study of living things. When scientists study frogs it is a kind of biology.

Biome: A large area with similar plants and animals that can live in a certain kind of environment.

Bioregion: A bioregion is a land area that shares similar plant and animal species, water, climate, rocks, soils, landforms [topography] and human culture.

Bioregionalism: Means being aware of the ecology, economy and culture of the place where you live.

Biosphere: The part of the Earth’s crust, water and atmosphere where living organisms can survive.

Bog: Wet, spongy ground, often surrounded by water; rich in plant matter.

Boreal Forest: It is a kind of forest found across Canada's north. It has coniferous trees, lichen, mosses and bushes. See Coniferous Trees and Lichen.