Solar System

11.	Which of the following is not a planet, which was considered by ancient Indians as a planet?
	A. Sun
	B. Mars
	C. Venus
	D. Saturn Option “A” is correct.

12.	The gas that helps in the organization of the Sun is –
	A. Oxygen and Carbon dioxide
	B. Helium and Oxygen
	C. Helium and Nitrogen
	D. Hydrogen and Helium Option “D” is correct. The Sun is a big ball of gas and plasma. The main gases are hydrogen or helium, but there are also small amounts of other elements such as oxygen, carbon, nitrogen, magnesium and iron. The discovery of Helium was done by observing the spectrum of the Sun. Later, it was found on Earth. Sun is composed of 75 % of hydrogen and 26.5 % of Helium. Hydrogen is converted into the energy in core of sun.

13.	What is the center of the Sun called?
	A. Stratosphere
	B. The Core
	C. Spectrum
	D. Lithosphere Option “B” is correct. The core is at the center. It the hottest region, where the nuclear fusion reactions that power the Sun occur. Moving outward, next comes the radiative (or radiation) zone. Its name is derived from the way energy is carried outward through this layer, carried by photons as thermal radiation.

14.	What is the upper part of the Sun called?
	A. Photosphere
	B. The core
	C. The corona
	D. Stratosphere Option “C” is correct. The uppermost portion of the Sun’s atmosphere is called the corona, and is surprisingly much hotter than the Sun’s surface (photosphere)! The upper corona gradually turns into the solar wind, a flow of plasma that moves outward through our solar system into interstellar space.

15.	The sun always rises in the east because –
	A. the earth rotates from west to east
	B. the earth rotates from east to west
	C. it is located in the east
	D. all of which Option “A” is correct. Earth rotates or spins toward the east, and that’s why the Sun rises in the east and travels westward across the sky.

16.	When does the sun appear at midnight in Norway?
	A. March 21
	B. September 24
	C. June 21
	D. Dec 12 Option “C” is correct. At the summer solstice around June 21, the midnight sun occurs here. The sun is low above the horizon even at night, but does not set. These are the longest days, lasting up to a month and a half at the North Cape (May 14 to July 29).

17.	What is the maximum distance of a planet from the Sun in its orbit called?
	A. Upsaur
	B. Aphelion
	C. Apogee
	D. Perigee Option “B” is correct.Aphelion is the maximum distance from the Sun in a planet in its orbit. It is the point where the celestial body in the orbit is farthest from the sun. Perihelion is the point in the orbit where the celestial body is closest to the sun.

18.	What is the minimum distance of a planet from the Sun in its orbit called?
	A. Perihelion
	B. Offshore
	C. Apogee
	D. Perigee Option “A” is correct.Minimum distance from the sun: Perihelion is the position that is closest to the sun in the orbit of a planet, meteor, or comet. It is believed to be at perihelion when the Earth is nearest to the Sun. This happens each year about January 3rd, when the Planet is around 147,098,074 km away.

19.	The average distance between which of the following is called ‘astronomical unit’?
	A. Earth and Sun
	B. Earth and Moon
	C. Jupiter and Sun
	D. Pluto and the Sun Option “A” is correct.Astronomical unit is the average distance between the Earth and the sun during an ear. It is useful to measure and report large distances. Q. Polar is located at a distance of 434 light-years from Earth.

20.	What is the meaning of ‘Midnight Sun’?
	A. Evening light
	B. Rising sun
	C. Very bright moon
	D. Heliotropism Option “D” is correct.Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun.

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