The ozone layer protects the Earth from rays sent down by the Sun:

(A) Ultraviolet rays
(B) Infrared rays
(C) Gamma rays
(D) Radioactive rays

Q. What is the Chemical form of Ozone?
(A) O4
(B) O3
(C) O2
(D) CO3

Q. Ozone’s O3 Structure was determined in:
(A) 1862
(B) 1863
(C) 1864
(D) 1865

Answers:
1. (A) Ultraviolet rays
2. (B) O3
3. (D) 1865

An eclipse of the Sun occurs when:

(A) The Moon is between the Sun and the Earth
(B) The Sun is between the Earth and the Moon
(C) The Earth is between the Sun and the Moon
(D) The Earth casts its shadow on the Moon

Q. Earth’s orbit around the sun is a(n):
(A) Perihelion
(B) Aphelion
(C) Ellipse
(D) None of these

Q. A ________ eclipse occurs when the Moon passes directly behind Earth and into its shadow.
(A) Lunar
(B) Solar
(C) Partial
(D) None of these

Answers:
1. (A) The Moon is between the Sun and the Earth
2. (C) Ellipse
3. (A) Lunar

A unit of length equal to the average distance between the Earth and Sun is called:

(A) Light year
(B) Astronomical unit
(C) Parsec
(D) Parallax

Q. What is the symbol of Astronomical unit? 
(A) AU
(B) ASU
(C) ALU
(D) AST-U

Q. The light year is a unit of length used to express _______ distances.
(A) Levenshtein
(B) Lee
(C) Astronomical
(D) None of these

Answers:
1. (B) Astronomical unit
2. (A) AU
3. (C) Astronomical

The age of the solar system is:

(A) 4.5 billion years
(B) 5.5 billion years
(C) 6.5 billion years
(D) 7.5 billion years

Q. The solar system is located in the Orion Arm, _______ light years from the center of Milky way galaxy.
(A) 16,000
(B) 26,000
(C) 36,000
(D) 46,000

Q. The two large planets Jupiter and Saturn are gas giants, being composed mainly of Hydrogen and:
(A) Carbon dioxide
(B) Nitrogen
(C) Helium
(D) None of these

Answers:
1. (A) 4.5 billion years
2. (B) 26,000
3. (C) Helium

Sun is a:

(A) Planet
(B) Comet
(C) Satellite
(D) None of these

Q. The Latin name of sun is:
(A) Sunne
(B) Sol
(C) Comet
(D) None of these

Q. The gravitational bound system of the Sun and the objects that orbit it is called:
(A) Solar System
(B) Milky way
(C) Galaxy
(D) None of these

Answers:
1. (D) None of these ( Star)
2. (B) Sol
3. (A) Solar system