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.

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.

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.

Cetaceans are mammals best adapted for aquatic life. They include whales, dolphins, and porpoises.

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.

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?

Ebb tide happens when the tide is lowering and water is flowing back out to sea.

An ecosystem is a community of plants, animals, and the environment they live in.