Our Universe
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
The Sun and the Solar System
SubtopicThe Sun and the Solar System under Our Universe for Grade 3 ICSE.
Preview questions (no answers)
- 1.
Why does life exist on Earth but not on other planets in our solar system?
A.It has no light
B.It has air and water
C.It is made of gas
D.It has rings
- 2.
What is the shape of the Earth's orbit around the Sun?
A.Perfect Square
B.Perfect Triangle
C.Oval or Elliptical
D.Straight Line
- 3.
Which planet comes between Mercury and Earth?
A.Mars
B.Venus
C.Saturn
D.Jupiter
- 4.
In the solar system, which planet is much larger than Earth?
A.Mercury
B.Mars
C.Jupiter
D.Venus
- 5.
The Solar System has a specific region located between the orbits of Mars and Jupiter that is filled with millions of rocky chunks. What is the name of this region marked as 'Region X' in the diagram?
A.The Milky Way
B.The Saturn Rings
C.The Asteroid Belt
D.The Moon's Path
- 6.
Besides planets, there are objects made of ice and dust that develop a long, glowing tail when they pass near the Sun. Based on the description in the diagram, what are these celestial bodies called?
A.Stars
B.Comets
C.Planets
D.Moons
- 7.
Which of these is the main source of heat for the planets in the solar system?
A.The Moon
B.The Earth's core
C.The Sun
D.The distant stars
- 8.
What happens during a solar eclipse?
A.The Earth comes between the Sun and the Moon.
B.The Sun comes between the Earth and the Moon.
C.The Moon comes between the Sun and the Earth, blocking sunlight.
D.A planet comes between the Sun and the Earth.
- 9.
Which of these planets is known as Earth's 'Twin' because it is similar in size and mass?
A.Mars
B.Venus
C.Mercury
D.Neptune
- 10.
What instrument do astronomers use to see distant planets and stars more clearly?
A.Microscope
B.Periscope
C.Telescope
D.Stethoscope
Download the worksheet for Our Universe - The Sun and the Solar System to practice offline. It includes additional chapter-level practice questions.
The Moon and its phases
SubtopicThe Moon and its phases under Our Universe for Grade 3 ICSE.
Preview questions (no answers)
- 1.
What do we call the second Full Moon that occasionally happens in a single calendar month?
A.Red Moon
B.Blue Moon
C.Yellow Moon
D.New Moon
- 2.
What is the main reason we only see one side of the Moon from Earth?
A.The Moon does not spin
B.The Moon spins at the same rate it orbits the Earth
C.The other side of the Moon is invisible
D.The Earth does not spin
- 3.
A lunar month is the time between one Full Moon and the next. How long is it roughly?
A.24 hours
B.7 days
C.29 days
D.365 days
- 4.
What happens after the Full Moon phase?
A.The Moon starts to look smaller (Waning)
B.The Moon starts to look bigger (Waxing)
C.The Moon disappears forever
D.The Moon turns into the Sun
- 5.
Which of these does the Moon NOT have?
A.Rocks
B.Dust
C.Mountains
D.Clouds
- 6.
In which phase is the Moon located on the opposite side of the Earth from the Sun?
A.New Moon
B.Full Moon
C.Crescent Moon
D.Half Moon
- 7.
What is the main source of the light that the Moon reflects?
A.The Stars
B.The Earth
C.The Sun
D.Internal Fire
- 8.
During the 'New Moon' phase, the Moon is positioned directly between the Sun and the Earth. If an astronaut were standing on the side of the Moon that faces us, what would the Earth look like to them?
A.The Earth would look like a 'New Earth' and be completely dark
B.The Earth would look like a 'Full Earth' and be completely lit
C.The Earth would look like a tiny 'Crescent' sliver
D.The Earth would be completely hidden behind the Sun
- 9.
In the context of the Earth-Moon system, what does the term 'Revolution' describe?
A.The Moon spinning on its axis.
B.The Moon moving in an orbit around the Earth.
C.The Earth spinning on its axis.
D.The Moon changing its physical size.
- 10.
If you were standing on the Moon during the 'Day', what color would the sky look?
A.Blue
B.Black
C.White
D.Pink
Download the worksheet for Our Universe - The Moon and its phases to practice offline. It includes additional chapter-level practice questions.
Stars and Constellations
SubtopicStars and Constellations under Our Universe for Grade 3 ICSE.
Preview questions (no answers)
- 1.
Can we see a constellation's shape change in just one night?
A.Yes, stars move very fast
B.No, the stars in a constellation stay in the same pattern
C.Yes, because the moon pushes them
D.No, because the stars are made of ice
- 2.
Compared to the Sun, other stars in the night sky look much smaller because ________.
A.They are actually tiny
B.They are much further away than the Sun
C.They are younger
D.They are colder
- 3.
The three bright stars in the middle of Orion are often called what?
A.The Orion Belt
B.The Lion's Tail
C.The Bear's Paws
D.The Queen's Crown
- 4.
What is the study of stars and planets called?
A.Biology
B.Astronomy
C.Botany
D.Zoology
- 5.
The North Star is very useful because it ________.
A.Shows the way to the South Pole
B.Always remains in the same position in the northern sky
C.Is the only star that can be seen during the day
D.Is the largest star in the Milky Way
- 6.
Which direction does the Sun appear to rise in every morning?
A.North
B.South
C.East
D.West
- 7.
The word 'Universe' refers to ________.
A.Only the Earth and the Moon
B.Only the Sun and the Planets
C.Everything that exists, including stars, planets, and space
D.Only the stars we can see at night
- 8.
Which of these objects in the sky is NOT a star?
A.The Sun
B.The Pole Star
C.Venus (often called the Evening Star)
D.Betelgeuse
- 9.
When we look at a constellation, are all the stars in that pattern at the same distance from Earth?
A.Yes, they are all in a straight line
B.No, they are at very different distances but look close from our perspective
C.Yes, they are all attached to each other
D.No, some are inside our atmosphere and some are outside
- 10.
Stars appear to move as a group across the night sky. What is the name of the imaginary axis the Earth spins on that points toward the Pole Star?
A.The Equator
B.The Orbit
C.The Earth's Axis
D.The Horizon
Download the worksheet for Our Universe - Stars and Constellations to practice offline. It includes additional chapter-level practice questions.
Movement of the Earth: Rotation and Revolution
SubtopicMovement of the Earth: Rotation and Revolution under Our Universe for Grade 3 ICSE.
Preview questions (no answers)
- 1.
Earth belongs to which of these groups?
A.The Solar System
B.The Ocean System
C.The Weather System
D.The Plant System
- 2.
Which of these is the shortest month of the year?
A.January
B.July
C.February
D.December
- 3.
During which movement does the Earth travel through space?
A.Only during rotation
B.Only during revolution
C.Both rotation and revolution
D.None of these
- 4.
If we look at the Earth from space, it looks like a giant blue ____.
A.Square
B.Cube
C.Marble or Ball
D.Pyramid
- 5.
The Earth takes 12 months to complete one full revolution around the Sun. According to the diagram, how much time does it take for the Earth to travel halfway through its orbit from Position A to Position B?
A.24 hours
B.3 months
C.6 months
D.12 months
- 6.
Which of these celestial bodies does NOT move around the Sun?
A.Earth
B.Mars
C.Moon
D.Venus
- 7.
If you were standing exactly on the North Pole, what would you be doing as the Earth rotates?
A.Running in a huge circle
B.Spinning in one spot
C.Moving towards the Equator
D.Staying completely still in space
- 8.
Which celestial body's movement is responsible for the 'month' as a unit of time, though it is not rotation or revolution of the Earth?
A.The Sun's rotation
B.The Moon's revolution around the Earth
C.Mars' revolution around the Sun
D.The Earth's rotation speed changing
- 9.
If you lived at the South Pole, how many times would you see the Sun rise and set in a single year?
A.365 times
B.Once
C.24 times
D.Never; it is always dark at the poles
- 10.
Why does the Sun appear to be 'setting' in the evening?
A.The Sun is moving below the horizon of the flat Earth.
B.Our location on Earth is turning away from the Sun due to rotation.
C.The Sun is moving to the other side of the solar system.
D.The Earth's revolution has moved us too far from the Sun.
Download the worksheet for Our Universe - Movement of the Earth: Rotation and Revolution to practice offline. It includes additional chapter-level practice questions.