The maximum length of a day at the poles is 6 months.
Seasons on Earth are caused by the revolution of Earth around the sun and its axis tilted at 66°.
Earth rotates around its axis from west to east.
The inclination of Earth’s axis to the orbital plane is 23°.
The mean radius of the Earth is approximately 6400 km.
Vernal equinox falls on 21st March.
The fixed path along which Earth revolves around the sun is called Earth’s orbit.
The shape of Earth is described as an oblate sphere.
Equinox occurs when the sun is vertically above the equator.
Summer solstice in the Southern Hemisphere occurs on 22nd December.
The equatorial diameter of Earth is approximately 12756 km.
Heat received by Earth from the sun is known as insolation.
The core temperature of Earth is estimated to be around 2500°C.
Time required for moonlight to reach Earth is 1.3 seconds.
The position of Earth in its orbit, when it is at its greatest distance from the sun, is called aphelion.
Days and nights are equal throughout the globe when the sun is above the equator.
The mean distance between perihelion and aphelion is approximately 149.5 million km.
The term that best describes the shape of the Earth is Geoid.
The period of equal day and night is along the equator.
The size of the Earth was first measured by Eratosthenes.
Day and nights are caused by the rotation of the Earth on its axis.
The crust forms 0.5% of the volume of the Earth.
At a latitude of 45°, the Earth rotates at the rate of 1120 km/h.
The Greenhouse Effect refers to the trapping of solar energy due to atmospheric carbon dioxide.
The Earth’s annual orbit around the sun covers a distance of 966 million km.
Insolation heats up the land masses more quickly than the water bodies because water needs more energy to warm.
The heavier silicates, known as Sima (Silica + Magnesium), are most abundant in the ocean floors.
The approximate equatorial circumference of the Earth is 40,000 km.
The Earth revolves around the sun at a speed of approximately 1600 km per minute.
Seasonal variation is the least at the equator.
The surface of Earth between the Tropic of Cancer and the Tropic of Capricorn is called the Torrid Zone.
The approximate diameter of the Earth is 12,756 km.
The place with the longest day and shortest night on 22nd December is Melbourne.
The polar diameter of the Earth is shorter than the equatorial diameter by about 43 km.
The internal core of the Earth is primarily made up of nickel and iron.
The specific gravity of the Earth as a whole is 5.52.
Vernal equinox occurs on March 21.
The Earth revolves around the sun in its orbit by approximately 1° per day.
The study of time in relation to Earth’s history is called none of these (correct term: chronology).
The distance between the Earth and the sun is smallest in the month of January.
Geostationary orbit is at a height of 36,000 km.
Due to the equatorial bulge and polar flattening, the polar radius of the Earth is 22 km shorter than the equatorial radius.
Antipodes are places diametrically opposite on Earth’s surface.
The largest fraction of solar energy reflected back into space before reaching Earth’s surface is due to clouds.
The Earth rotates around the axis pointing towards the polar star.
The maximum altitude of the polar star at 28°N and 78°E is 28°.
The incoming short-wave solar radiation balanced by an equal amount of long-wave radiation from Earth going back to space is known as the heat balance of Earth.
The approximate surface temperature on the sunlit side of the Earth is 17°C.
The part of Earth’s surface that receives the highest amount of insolation is the tropical desert.
The sun shines vertically on the equator twice a year.
The amount of insolation received at a place on Earth’s surface depends on its latitude.
Of the total volume of Earth, the mantle forms the major part.
The distance of the equator from either of the poles is 10,002 km.
The speed of Earth’s revolution is 29.8 km/sec.
The lunar eclipse gives evidence for the spherical shape of the Earth.
The orbit along which the Earth revolves is elliptical.
Japan is called the easternmost country because the sun rises there as soon as it sets in other parts of the world.
The Asthenosphere is a semi-fluid layer beneath the lithosphere, part of the Earth’s mantle.
