The Paleozoic Era begins 544 million years ago up to 248 million years ago. It refers to ancient life. It is also known as the Age of Fishes

The Homo sapiens evolved in the chibanian age of the Pleistocene epoch

The Tidal Hypothesis was proposed by James Jeans and Harold Jeffreys. This theory explains the origin of the earth and the solar system.

Kant put forward his gaseous hypothesis theory in 1755. This theory was based on Newton’s law of Gravitation.

The Great white spot (Great white Oval) is a phenomena associated with large periodic storms in the atmosphere of Saturn which are visible from the planet Earth.

Ox bow lake is a U shaped lake formed when a meander of a river is cut off. This cut off meander creates a free standing water body called Ox bow lake.

Faulted Mountains is a feature of continent-continent convergence. Mid-oceanic ridges, Fissure volcanoes and rift valleys are a result of divergent plate boundaries.

Forested wetlands are called as swamps. They are located all around the world. Freshwater swamps form along large lakes and rivers. Saltwater swamps are found along tropical and sub tropical coastlines.

According to Alfred Wegener, all the major continents formed one giant supercontinent, called Pangaea. About 200 million years ago, the supercontinent Pangaea began to rift.

Core (Nife) is the innermost layer of the earth. It is made up of dense heavy metals. The average density of the core is 12 gm/cm3