General Geographical Features Test - 5

An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments.

The Dead Sea is one of the world's saltiest bodies of water. Although Lake Assal (Djibouti), Garabogazköl and some hypersaline lakes of the McMurdo Dry Valleys in Antarctica (such as Don Juan Pond) have reported higher salinities.

Water table, also called Groundwater Table, upper level of an underground surface in which the soil or rocks are permanently saturated with water. The water table separates the groundwater zone that lies below it from the capillary fringe, or zone of aeration, that lies above it.

The deepest trench 'Mariana Trench' is in Pacific Ocean. The Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. In 2010 the United States Center for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters .

The salty Caspian Sea has the greatest surface area of any lake at 143,200 square miles (370,886 square kilometers).
The Caspian Sea is the world's largest inland body of water, variously classed as the world's largest lake or a full-fledged sea. It is an endorheic basin located between Europe and Asia, to the east of the Caucasus Mountains and to the west of the broad steppe of Central Asia.

A tide just after a new or full moon, when there is the greatest difference between high and low water.
A tide in which the difference between high and low tide is the greatest. Spring tides occur when the moon is either new or full, and the sun, the moon, and the Earth are aligned. When this is the case, their collective gravitational pull on the Earth's water is strengthened.

Ocean currents are deep. They travel hundreds and even thousands of kilometers. They carry warm water form one place to another. Warm water contains lots of fishes, which are useful for those who are fishing. Besides, currents carry food for fishes also.

The Arctic Ocean is the smallest of the world's five ocean basins. A polar bear walks on the frozen surface of the Arctic Ocean. The freezing environment provides a home for a diverse range of creatures. With an area of about 6.1 million square miles , the Arctic Ocean is about 1.5 times as big as the United States.