Our Universe
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
The Moon and its surface
SubtopicThe Moon and its surface under Our Universe for Grade 5 ICSE.
Preview questions (no answers)
- 1.
What is the fine, powdery dust covering the Moon's surface called?
A.Lunar regolith
B.Sand
C.Magma
D.Clay
- 2.
The imaginary line that separates the bright side from the dark side of the Moon is called the:
A.Equator
B.Axis
C.Terminator
D.Orbit
- 3.
Life is not possible on the Moon because it lacks:
A.Rocks and soil
B.Air and liquid water
C.Light and shadows
D.Craters and mountains
- 4.
Ancient people used to call the dark areas on the Moon 'Maria', which is the Latin word for:
A.Mountains
B.Seas
C.Clouds
D.Dust
- 5.
During which phase does a Solar Eclipse occur?
A.Full Moon
B.New Moon
C.Last Quarter
D.Waxing Crescent
- 6.
Why is the Moon called a 'Natural Satellite'?
A.Because it was built by nature
B.Because it revolves around a planet
C.Because it sends radio signals
D.Because it is very small
- 7.
What is the shape of the Moon?
A.Perfectly flat
B.A disc
C.Nearly spherical
D.Cylindrical
- 8.
How does the Moon's lack of a global magnetic field affect its surface?
A.It causes the surface to be very cold
B.It allows solar wind particles to strike and change the surface rocks
C.It prevents craters from forming
D.It makes the Moon revolve slower around the Earth
- 9.
The Moon reflects sunlight. What is the technical term for the line that separates the illuminated day side from the dark night side on the Moon?
A.The Horizon
B.The Terminator
C.The Equator
D.The Meridian
- 10.
Which layer of the Moon is thought to be partially molten (liquid)?
A.The Crust
B.The Upper Mantle
C.The Boundary between the Core and Mantle
D.The entire surface
Download the worksheet for Our Universe - The Moon and its surface to practice offline. It includes additional chapter-level practice questions.
Phases of the Moon
SubtopicPhases of the Moon under Our Universe for Grade 5 ICSE.
Preview questions (no answers)
- 1.
Which of these is the correct sequence of phases?
A.Full Moon -> New Moon -> Crescent
B.New Moon -> Crescent -> Quarter
C.Quarter -> New Moon -> Full Moon
D.Crescent -> Full Moon -> New Moon
- 2.
The phase of the Moon that looks like a backward letter 'C' (lit on the left) just before New Moon is:
A.Waxing Crescent
B.Waning Crescent
C.Last Quarter
D.First Quarter
- 3.
When we see more than half of the Moon lit, but it's getting smaller every night, it is a:
A.Waxing Gibbous
B.Waning Gibbous
C.First Quarter
D.Waning Crescent
- 4.
What is the term for the first visible sliver of the Moon after a New Moon?
A.Waning Crescent
B.Waxing Crescent
C.First Quarter
D.Waning Gibbous
- 5.
Which term describes the 14-day period when the visible part of the moon is decreasing?
A.Krishna Paksha
B.Shukla Paksha
C.Poornima
D.Amavasya
- 6.
During which phase does the Moon look like a full circle?
A.New Moon
B.Gibbous Moon
C.Full Moon
D.Quarter Moon
- 7.
What is the phase of the Moon just before it becomes 'New' again?
A.First Quarter
B.Waning Gibbous
C.Waning Crescent
D.Waxing Crescent
- 8.
The time it takes for the Moon to rotate once on its axis is approximately equal to:
A.24 hours
B.27.3 days
C.365 days
D.29.5 days
- 9.
During which phase can a Lunar Eclipse potentially occur?
A.New Moon
B.Full Moon
C.First Quarter
D.Third Quarter
- 10.
How many days does it take for the Moon to go from New Moon to Waxing Gibbous, approximately?
A.7 days
B.10 to 12 days
C.14 days
D.20 days
Download the worksheet for Our Universe - Phases of the Moon to practice offline. It includes additional chapter-level practice questions.
Solar and Lunar Eclipses
SubtopicSolar and Lunar Eclipses under Our Universe for Grade 5 ICSE.
Preview questions (no answers)
- 1.
Which word describes the bending of light around the Earth's atmosphere during an eclipse?
A.Reflection
B.Refraction
C.Rotation
D.Revolution
- 2.
During which eclipse does the Earth come between the Sun and the Moon?
A.Solar Eclipse
B.Lunar Eclipse
C.Annular Eclipse
D.Star Eclipse
- 3.
Does the Moon have its own light?
A.Yes, it is a star
B.No, it reflects sunlight
C.Yes, it glows in the dark
D.No, it gets light from the Earth
- 4.
If you are standing in the Penumbra during a solar eclipse, you will see a:
A.Total Solar Eclipse
B.Partial Solar Eclipse
C.Lunar Eclipse
D.No eclipse at all
- 5.
Suppose an astronaut is standing on the Moon during a Total Lunar Eclipse (as observed from Earth). Based on the alignment shown in the diagram, what would the astronaut see in the sky?
A.The Moon's shadow moving across the surface of the Earth
B.The Earth passing in front of the Sun and blocking its light
C.The Sun passing between the Earth and the Moon
D.The Earth appearing as a bright, full disk reflecting sunlight
- 6.
If the Moon's orbit was in the exact same plane as the Earth's orbit around the Sun, how often would we see a solar eclipse?
A.Once a year
B.Once every month
C.Once every decade
D.Never
- 7.
Why does the Moon's umbra only cover a small part of the Earth during a solar eclipse?
A.The Earth is much larger than the Moon
B.The Sun is very close to the Earth
C.The Moon's shadow is transparent
D.The Earth moves out of the way
- 8.
If you observe a 'Penumbral Lunar Eclipse,' what will you see?
A.The Moon will look slightly darker or shaded, but not disappear or turn red.
B.The Moon will turn a deep blood-red color.
C.The Moon will have a 'bite' taken out of it that is pitch black.
D.The Moon will completely disappear from the sky for several hours.
- 9.
In a partial solar eclipse, which part of the Moon's shadow falls on the observer?
A.Penumbra
B.Umbra
C.Antumbra
D.Corona
- 10.
What is the name for the period of time (roughly 18 years) after which the Sun, Earth, and Moon return to nearly the same relative geometry?
A.The Saros Cycle
B.The Lunar Cycle
C.The Solar Cycle
D.The Ecliptic Cycle
Download the worksheet for Our Universe - Solar and Lunar Eclipses to practice offline. It includes additional chapter-level practice questions.
Artificial Satellites and Space exploration
SubtopicArtificial Satellites and Space exploration under Our Universe for Grade 5 ICSE.
Preview questions (no answers)
- 1.
Why do rockets have multiple stages?
A.To look beautiful
B.To drop heavy empty fuel tanks and go faster
C.To carry more passengers
D.To take breaks in space
- 2.
The first mission to successfully land on the Moon was called:
A.Sputnik
B.Apollo 11
C.Voyager 1
D.Chandrayaan
- 3.
Artificial satellites are different from the Moon because:
A.They are much bigger than the Moon
B.They are made by humans
C.They do not orbit the Earth
D.They are natural objects
- 4.
India's planned mission to send humans into space is called:
A.Gaganyaan
B.Vayuyan
C.Sagar-yaan
D.Aakash-yaan
- 5.
What is the main combination used as fuel in many modern liquid-propellant rockets?
A.Petrol and Water
B.Coal and Oxygen
C.Liquid Hydrogen and Liquid Oxygen
D.Diesel and Nitrogen
- 6.
What do we call the branch of science that deals with the study of space and heavenly bodies?
A.Astrology
B.Astronomy
C.Geology
D.Meteorology
- 7.
What famous phrase did Rakesh Sharma use to describe how India looked from space?
A.It is very colorful
B.Saare Jahaan Se Achha
C.Beautiful and blue
D.Like a golden bird
- 8.
Artificial satellites are placed at different heights above the Earth depending on their purpose. A satellite's 'Footprint' is the specific area on the Earth's surface from which the satellite's signal can be received. If a communication satellite is moved from a Low Earth Orbit (LEO) to a much higher Geostationary Orbit (GEO), how does its footprint change?
A.The footprint becomes much smaller, focusing the signal on a single small town.
B.The footprint remains exactly the same size because it is only affected by the satellite's power.
C.The footprint becomes larger, allowing the satellite to cover a much bigger portion of the Earth's surface.
D.The footprint disappears because the satellite is too far away for the signals to reach the ground.
- 9.
Why do satellites use gyroscopes?
A.To measure the temperature of the outer shell
B.To maintain the satellite's orientation and stability in space
C.To generate electricity from the satellite's movement
D.To calculate the distance to the nearest planet
- 10.
What is the 'Kessler Syndrome' regarding space exploration?
A.The feeling of dizziness astronauts get in space
B.A scenario where the density of objects in LEO is high enough that collisions create more debris, causing a chain reaction
C.The process of a star turning into a supernova
D.A type of fuel leak that happens in cryogenic engines
Download the worksheet for Our Universe - Artificial Satellites and Space exploration to practice offline. It includes additional chapter-level practice questions.