A delta is a low, water, land formed at the mouth of a river. It is formed from the silt, sand and small rocks that flow downstream in the river and are deposited in a __________. It is often shaped like a triangle.
Delta
A volcano that is erupting. Also, a volcano that is not presently erupting, but that has erupted within historical time and is considered likely to do so in the future.
Active Volcano
A small, horseshoe-shaped body of water along the coast; the water is surrounded by land formed by soft rock.
Cove
A pointed piece of land that sticks out into a sea, ocean, lake or river.
Cape
A large mass of material or mixture of material falling or sliding rapidly under the force of gravity. These often are classified by their content, such as snow, ice, soil, or rock avalanches. A mixture of these materials is a debris avalanche.
Avalanche
A large region with little or no vegetation as a result of not receiving enough precipitation.
Desert
A mixture of water-saturated rock debris that flows downslope under the force of gravity (also called lahar or mudflow).
Debris Flow
The land mass on Earth is divided into ___________. There are seven: Africa, Asia, Antarctica, Australia, Europe, North America and South America.
Continent
The life layer at and near the surface of the Earth, including both plants and animals.
Biosphere
A deep valley with very steep sides-often carved from the Earth by a river.
