Glossary of terms used on this siteThere are 51 entries in this glossary.
Africa is the second-largest continent, connected to Asia by the Isthmus of Suez and lying between the Mediterranean Sea and the Atlantic and Indian oceans.
Bioaccumulation is the process by which substances accumulate in the tissues of living organisms. This term is used to explain how toxic substances accumulate through a food chain.
Something is biodegradable if it can decompose or break down safely and relatively quickly by biological means, usually with the aid of bacteria and other microorganisms. A biodegradable product breaks down into the raw materials of nature and disappears into the environment.
Biomass is the total amount of living things in a region. (The temperate rainforest of the Pacific Northwest has a greater biomass per acre than any other place on earth.)
The canopy is the layer of rainforest made up of the tops of the tallest trees: Coastal Redwood, Douglas Fir, Sitka Spruce, Western Red Cedar, and Western Hemlock.
A carnivore is an animal that only eats meat.
Cetaceans are mammals best adapted for aquatic life. They include whales, dolphins, and porpoises.
Conifer trees are cone-bearing evergreen trees with needles.
Coniferous forests are made up mainly of cone-bearing or coniferous trees, such as spruces, hemlocks, pines and firs. The leaves of these trees are either small and needle-like and most stay green all year.
Decomposers are microscopic fungi and bacteria that feed directly on dead matter, breaking it down.
Currency used in Algeria and Tunisia. 1 US dollar is equal to about 72 Algerian dinars and about 1.30 Tunisian dinars. Whose currency is stronger? Algeria or Tunisia?
A dorsal fin is a fin found on the back of fish and some marine mammals.
Ebb tide happens when the tide is lowering and water is flowing back out to sea.
Echolocation is a way for animals to use sound to locate things. Basically, the animal makes a sound and then listens for the echo to determine how far away an object is. Most whales, dolphins, and bats use echolocation to find their prey.
An ecosystem is a community of plants, animals, and the environment they live in.