The Solar System
Result
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Click on the correct answer.

1. Which is the largest object in the solar system?
Sun
Ceres
Venus
Jupiter

2. Which is the outermost layer of the sun?
Core
Corona
Photosphere
Chromosphere

3. What is the sun made of?
Helium and carbon
Helium and oxygen
Hydrogen and helium
Hydrogen and oxygen

4. Which statement is not true about the sun?
It is a hot ball of gases.
It cools off at nighttime.
It provides solar energy.
It is made of different layers.

5. Why do planets have different periods of revolution?
They have different sizes.
They are made of different gases.
They have different surface temperatures.
They have different distances from the sun.

6. What is the hottest planet in the solar system?
Mars
Earth
Pluto
Venus

7. Which is the only planet that sustains life?
Pluto
Jupiter
Earth
Uranus

8. Which of these has the shortest period of revolution around the sun?
Mercury
Earth
Pluto
Uranus

9. Which of these planets is a gas giant?
Mars
Venus
Mercury
Neptune

10. Which planet has the Great Red Spot?
Uranus
Jupiter
Mercury
Neptune

11. Why is Pluto now considered a dwarf planet?
It is far from the sun.
It is a Kuiper belt object.
It has a very low mass and irregular orbit.
It is near Neptune.

12. What part of the sun’s surface are slightly cooler in temperature?
Corona
Sunspots
Prominences
Nuclear fusion

13. Why does Venus have high temperature?
It is a spinning ball of gases.
It rotates very slowly on its axis.
It is the nearest planet to the sun.
It has dense clouds that create a greenhouse effect.

14. What is the solar system composed of?
The moons and meteors
The comets and asteroids
The sun and all the planets
All of the above

15. The time it takes the moon to revolve around the Earth.
27 1/3 days
29 days
29 1/2 days
30 days

16. The strength of the moon's gravitational pull compared to that of Earth.
1/2
1/4
1/5
1/6

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