Science 6 · Unit 6: Light and the Solar System · Cambridge Primary Science Stage 6

Questions

1. 1. What is the star at the centre of our Solar System?

   • the Moon
   • the Earth
   • the Sun
   • Jupiter
   Check

2. 2. How many planets are in our Solar System?

   • 9
   • 5
   • 8
   • 12
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3. 3. Which planet is closest to the Sun?

   • Mercury
   • Venus
   • Earth
   • Neptune
   Check

4. 4. Which planet is furthest from the Sun?

   • Neptune
   • Mercury
   • Jupiter
   • Mars
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5. 5. Which is the biggest planet?

   • Mercury
   • Earth
   • Jupiter
   • Mars
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6. 6. Why do the Sun and Moon look about the same size from Earth?

   • The Sun is closer.
   • They are the same size.
   • The Moon is bigger.
   • The Sun is much bigger but much further away.
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7. 7. What two movements do all planets make?

   • They stay still.
   • They orbit the Moon only.
   • They grow and shrink.
   • They spin on their axis and orbit the Sun.
   Check

8. 8. How long is one Earth day?

   • 365 days
   • 24 hours
   • 12 hours
   • 60 minutes
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9. 9. How long does Mercury take to orbit the Sun?

   • 88 Earth days
   • 165 Earth years
   • 365 Earth days
   • 12 Earth years
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10. 10. Why does Neptune take so long to orbit the Sun?

    • It spins backwards.
    • It is the smallest.
    • It is made of rock.
    • It is furthest away, so its orbit is longest.
    Check

11. 11. Which planet turns on its axis in the opposite direction to most others?

    • Earth
    • Jupiter
    • Mars
    • Venus
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12. 12. Which planet is called 'the red planet'?

    • Venus
    • Neptune
    • Jupiter
    • Mars
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13. 13. What is Jupiter mostly made of?

    • gases such as hydrogen and helium
    • rock and water
    • ice only
    • iron
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14. 14. Which moon in the Solar System is bigger than the planet Mercury?

    • Earth's Moon
    • Phobos
    • Deimos
    • Ganymede
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15. 15. How long does the Moon take to orbit the Earth?

    • 24 hours
    • 7 days
    • 29.5 days
    • 365 days
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16. 16. What is a phase of the Moon?

    • the part of the Moon's lit half that we can see from Earth
    • the Moon's distance
    • the Moon's shadow on Earth
    • the Moon's size
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17. 17. At new Moon, what do we see?

    • a full circle
    • half the Moon
    • no Moon at all
    • a crescent only
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18. 18. Why can humans not live on Jupiter?

    • It has too much water.
    • It is too close to the Sun.
    • It has no solid surface and is extremely cold.
    • It is too small.
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19. 19. Jupiter's four biggest moons are named after the astronomer who discovered them. Who was he?

    • Isaac Newton
    • Archimedes
    • Neil Armstrong
    • Galileo Galilei
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