Achievers Section: Universe | GK Olympiad for Class 3 PDF Download

Q1: I orbit the Sun and am the smallest member of the Solar System. I am also the first planet in order from the Sun. Who am I?
(a) Earth
(b) Mercury
(c) Mars
(d) Jupiter

Ans: (b)
Sol: Mercury, despite being the closest to the Sun, is not the hottest planet because it lacks an atmosphere to retain heat.

Q2: Why can we see the Moon?
(a) It is a luminous object.
(b) It reflects the light from Earth.
(c) It has glowing fireflies.
(d) It reflects sunlight.

Ans: (d)
Sol: The Moon does not produce its own light; it appears bright because it reflects sunlight. On a new moon day, the illuminated side faces away from Earth.

Q3: Why do astronauts wear oxygen masks on the Moon?
(a) There is no oxygen on the Moon.
(b) The Moon contains poisonous gases.
(c) They carry oxygen as a precaution.
(d) They fear encountering Moon inhabitants.

Ans: (a)
Sol: The Moon has no atmosphere, meaning it lacks life-sustaining gases like oxygen.

Q4: Why is there no life on the Moon?
(a) It orbits the Earth.
(b) It orbits itself.
(c) It lacks water and air.
(d) It has no natural light.

Ans: (c)
Sol: Life requires both water and oxygen, neither of which are present on the Moon.

Q5: Which English letter does NOT resemble any phase of the Moon?
(a) C
(b) D
(c) A
(d) O

Ans: (c)
Sol: The letter C represents the crescent moon, D resembles the half-moon, and O represents the full moon, but A does not resemble any Moon phase.