The difference between continents and oceans is that the ocean is a large water body which covers 79% of the earth’s surface, whereas a continent is a huge landmass whose borders are defined by oceans.

The difference between a continent and a subcontinent is that a subcontinent is a small part of a continent. A continent is a large land mass, whose borders are defined by oceans, whereas a subcontinent is a large, relatively self-contained landmass formed as a subdivision of a continent.

The difference between a continent and a country is that a country is found within a continent. A continent is a large land mass whose borders are defined by oceans. A country is mainly defined by geo-political borders.

A country is defined as a region or an area of a land which is controlled by its own government. The term ‘nation’ refers to a community or group of people who share the same history, language, descent and a common government.

Agriculture is the practice of cultivating food and rearing animals for food and food products. Irrigation is the act of supplying dry land with water, especially during agriculture.

Paranormal is a term that covers a wide range of anomalies such as telepathy, extra-sensory perception, psycho kinesis etc. Parapsychology is the examination and study of paranormal occurrences that are inexplicable by science.

Psychology is the study of human mind and its actions. Parapsychology aims to throw light on those phenomena, which are rendered inexplicable by science.

A galaxy is a huge collection of stars that are held together by gravitational attraction. A solar system is defined as the group of celestial bodies which revolve around the sun, due to its strong gravitational pull. The main difference between a solar system and a galaxy is in their size.

Both, circles and spheres are circular objects. A circle is a two-dimensional figure, while a sphere is a three-dimensional figure.

A Circle and Ellipse have closed curved shapes. In a circle, all the points are equally far from the center, which is not the case with an ellipse; in an ellipse, all the points are at different distances from the center.

Both, Liver and Lungs are evolved in the purification process of the body. Livers are involved in the detoxification; whereas Lungs are involved in the gas exchange that is taking in oxygen and releasing carbon dioxide.

Kidneys and Livers are the filtering and urinary systems of the body. Kidneys play an important role, in the excretion of waste and re-absorption of the ions, glucose and other vital substances of the body; while the Liver is responsible for the detoxification and production of proteins and enzymes, required for the digestion of the body.

Elephants are a relative of the Mammoths; both belong to family Elephantidae. In today’s world, mammoths do not exist. It was found that they usually had larger tusks than elephants.