Earth MCQ Question and Answer | Geography MCQ Question

Variation in duration of day and night is due to revolution of earth around the sun and inclination of earth at an angle of 66%.

At Mumbai the sun can come overhead, but it will never do so at Delhi. If you look at a map you'll see that Delhi is a bit north of the tropic of cancer, so there is never a time in Delhi when the sun will be directly overhead.

The focus is also called the hypocenter of an earthquake. The vibrating waves travel away from the focus of the earthquake in all directions.

The distance between two consecutive longitudes(91° E and 92° E) at the Poles is 0 km.

The place which has the longest day and shortest night on 22 December is Melbourne.

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

The following phenomenon are the effect of the rotation of the Earth are Apparent movement of the Sun, the Moon and the Stars, Flatness of the poles and bulge at the Equator, Occurrence of' sunrise, noon and sunset and Magnetic field of the earth.

Japan being the Eastern most country in the World, it has the earliest sunrise. Japan has been recognized as the land of the rising sun for at least 1400 years. The actual name of Japan in Japanese is Nihon which means "sun-origin" which is loosely translated to mean "land of the rising sun".

Helium-4 is the most common and stable isotope of helium. It is one of the most abundant elements in the universe and is found in very large quantities inside stars and gas giant planets.

Saturn is the second-largest planet in our Solar System and is known as a gas giant. Its atmosphere is made up of about 96% hydrogen and around 3% helium. Almost all of this helium is Helium-4, making Saturn extremely rich in this isotope.

Earth contains only tiny amounts of helium in its atmosphere because helium is a very light gas. Over time, it rises into the upper atmosphere and escapes into space due to Earth's relatively weaker gravity.

The Moon has almost no atmosphere. Although the solar wind deposits small amounts of helium (including Helium-4) onto the lunar surface, these quantities are very small compared to the enormous amount of helium present in Saturn. The Moon is more commonly studied for its potential reserves of Helium-3, not because it is rich in Helium-4.

Venus has a very dense atmosphere, but it is composed of about 96% carbon dioxide and about 3.5% nitrogen. Helium is present only in trace amounts and is not abundant.

Therefore, among the given options, Saturn contains Helium-4 in abundance, making Option D the correct answer.

GMT is Greenwich Mean Time. It is the local time at zero degrees longitude in Greenwich, England and is used as the world reference for times at different longitudes around the globe.