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Our Universe & Astronomy — Homi Bhabha Class 6 Physics MCQs with Solutions
Free Homi Bhabha Class 6 Physics Our Universe & Astronomy MCQs with step-by-step solutions covering Solar System & Planets, Moons & Satellites, Stars & Constellations, Space Exploration. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — Solar System & Planets · easy · theory
How many planets are there in our Solar System?
A. 9
B. 6
C. 8 ✓ Correct
D. 7
Solution: Since 2006 the Solar System has 8 planets; Pluto is now called a dwarf planet.
Q2 — Solar System & Planets · easy · theory
Which planet is closest to the Sun?
A. Mars
B. Venus
C. Earth
D. Mercury ✓ Correct
Solution: Mercury is the nearest planet to the Sun.
Q3 — Solar System & Planets · easy · theory
The Sun sits at the centre of our Solar System. What kind of object is the Sun?
A. A planet
B. A star ✓ Correct
C. A comet
D. A moon
Solution: The Sun is a star — a huge ball of hot glowing gas that gives us light and heat.
Q4 — Solar System & Planets · easy · theory
On which planet do we live?
A. Venus
B. Jupiter
C. Earth ✓ Correct
D. Mars
Solution: We live on Earth, the third planet from the Sun.
Q5 — Moons & Satellites · easy · theory
How many natural moons does the Earth have?
A. 0
B. 3
C. 1 ✓ Correct
D. 2
Solution: Earth has just one natural moon, which we simply call the Moon.
Q6 — Moons & Satellites · easy · theory
A moon (natural satellite) moves around a …
A. Planet ✓ Correct
B. Galaxy
C. Star
D. Comet
Solution: A moon is a natural satellite that goes around a planet.
Q7 — Moons & Satellites · easy · theory
Does the Moon make its own light?
A. No, it reflects the Sun’s light ✓ Correct
B. No, it is always dark
C. Yes, from a fire inside
D. Yes, it burns like the Sun
Solution: The Moon has no light of its own; it shines by reflecting sunlight.
Q8 — Moons & Satellites · easy · theory
The surface of the Moon is covered with many bowl-shaped holes called …
A. Forests
B. Craters ✓ Correct
C. Rivers
D. Oceans
Solution: The round pits on the Moon, made by space rocks crashing into it, are called craters.
Q9 — Stars & Constellations · easy · theory
Which star is the closest to the Earth?
A. The Moon
B. Polaris
C. The Sun ✓ Correct
D. Sirius
Solution: The Sun is the star nearest to Earth. (The Moon is not a star.)
Q10 — Stars & Constellations · easy · theory
Stars are made mostly of very hot …
A. Water
B. Gas ✓ Correct
C. Rock
D. Ice
Solution: Stars are enormous balls of hot glowing gas.
Q11 — Stars & Constellations · easy · theory
Why do stars look like tiny points of light in the sky?
A. They are really small
B. They are broken
C. They are very, very far away ✓ Correct
D. They are cold
Solution: Stars are huge, but they look tiny because they are extremely far from us.
Q12 — Stars & Constellations · easy · theory
A group of stars that seems to form a pattern or picture in the sky is called a …
A. Comet
B. Planet
C. Constellation ✓ Correct
D. Galaxy
Solution: A star pattern in the sky, such as Orion, is called a constellation.
Q13 — Space Exploration · easy · theory
A person who is trained to travel into space is called an …
A. Astronomer
B. Astrologer
C. Architect
D. Astronaut ✓ Correct
Solution: People who travel into space are called astronauts.
Q14 — Space Exploration · easy · theory
A powerful vehicle that burns fuel to carry spacecraft up into space is called a …
A. Train
B. Aeroplane
C. Submarine
D. Rocket ✓ Correct
Solution: Rockets burn fuel to push spacecraft up and out into space.
Q15 — Space Exploration · easy · theory
What is the name of India’s space research organisation?
A. NASA
B. ESA
C. ISRO ✓ Correct
D. JAXA
Solution: ISRO (Indian Space Research Organisation) runs India’s space programme.
Q16 — Space Exploration · easy · theory
Who was the first human to walk on the Moon?
A. Buzz Aldrin
B. Yuri Gagarin
C. Neil Armstrong ✓ Correct
D. Rakesh Sharma
Solution: Neil Armstrong became the first person to walk on the Moon in 1969.
Q17 — Solar System & Planets · hard · theory
Mercury is closest to the Sun, yet another planet is even hotter. Which one?
A. Jupiter
B. Venus ✓ Correct
C. Neptune
D. Mars
Solution: Venus is the hottest planet because its thick atmosphere traps the Sun’s heat like a blanket.
Q18 — Solar System & Planets · hard · theory
Which two planets have no moons at all?
A. Mercury and Venus ✓ Correct
B. Venus and Mars
C. Earth and Mars
D. Jupiter and Saturn
Solution: Mercury and Venus are the only planets with no moons of their own.
Q19 — Moons & Satellites · hard · theory
We always see the same side of the Moon from Earth because the Moon …
A. Spins once each time it goes once around Earth ✓ Correct
B. Is completely flat
C. Does not move at all
D. Is too far to turn
Solution: The Moon turns once for every trip around Earth, so the same face always points towards us.
Q20 — Moons & Satellites · hard · theory
The changing shapes of the Moon — full, half and crescent — that we see are called the …
A. Craters of the Moon
B. Eclipses of the Moon
C. Tides of the Moon
D. Phases of the Moon ✓ Correct
Solution: As the Moon orbits Earth we see different lit portions of it; these shapes are its phases.
Q21 — Stars & Constellations · hard · theory
Which colour of star is the hottest?
A. Yellow
B. Orange
C. Red
D. Blue ✓ Correct
Solution: Blue-white stars are the hottest, while red stars are the coolest.
Q22 — Stars & Constellations · hard · theory
The constellation Orion is easy to spot by a short row of three bright stars called Orion’s …
A. Crown
B. Tail
C. Ring
D. Belt ✓ Correct
Solution: Three bright stars in a line across Orion form the well-known "Orion’s Belt".
Q23 — Space Exploration · hard · theory
What is the name of the large laboratory in which astronauts live and work while orbiting the Earth?
A. Hubble Telescope
B. Milky Way
C. Space Rocket
D. International Space Station (ISS) ✓ Correct
Solution: The International Space Station is a laboratory that circles the Earth, where astronauts live and do experiments.
Q24 — Space Exploration · hard · theory
A robotic vehicle sent to drive over and explore a planet’s surface, like those on Mars, is called a …
A. Rocket
B. Satellite
C. Telescope
D. Rover ✓ Correct
Solution: A rover is a robot vehicle that moves across a planet’s surface to explore it.
Q25 — Solar System & Planets · medium · theory
Which is the largest planet in the Solar System?
A. Earth
B. Neptune
C. Saturn
D. Jupiter ✓ Correct
Solution: Jupiter is the biggest planet, far larger than all the others.
Q26 — Solar System & Planets · medium · theory
Which planet is famous for its beautiful bright rings?
A. Mars
B. Saturn ✓ Correct
C. Mercury
D. Earth
Solution: Saturn is best known for its wide, shining rings made of ice and rock.
Q27 — Solar System & Planets · medium · theory
Which planet is often called the "Red Planet"?
A. Jupiter
B. Mercury
C. Mars ✓ Correct
D. Venus
Solution: Mars looks reddish because its soil is full of rusty, iron-rich dust.
Q28 — Solar System & Planets · medium · theory
The fixed path along which a planet moves around the Sun is called its …
A. Equator
B. Axis
C. Shadow
D. Orbit ✓ Correct
Solution: Each planet travels around the Sun along a path called its orbit.
Q29 — Moons & Satellites · medium · theory
A man-made object put into space to circle the Earth (for TV or weather) is called a …
A. Artificial satellite ✓ Correct
B. Planet
C. Natural satellite
D. Star
Solution: A satellite built by people and launched into orbit is an artificial satellite.
Q30 — Moons & Satellites · medium · theory
Which giant planet has dozens of moons, the most in our Solar System?
A. Mercury
B. Jupiter ✓ Correct
C. Earth
D. Mars
Solution: Jupiter, the largest planet, has dozens of moons circling it.