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CIE iGCSE Co-Ordinated Science P6.1 The Solar System Exam Style Questions Paper 1

Question

The orbit of a planet lies between the orbit of Venus and the orbit of Mars.

What is the planet?

A. Saturn
B. Jupiter
C. Earth
D. Uranus

▶️ Answer/Explanation
The order of the planets from the Sun is: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. The planet whose orbit lies between Venus and Mars is Earth, as it is the third planet from the Sun. Saturn and Jupiter are further out beyond Mars, and Uranus is even further out. Therefore, the correct answer is Earth.
Answer: (C)

Question

Which type of force keeps an object in orbit around the Sun and which type of force forms a protostar?

▶️ Answer/Explanation
Gravitational force is the universal force of attraction between objects with mass. It keeps planets in orbit around the Sun by providing the centripetal force needed for circular motion. Additionally, gravitational attraction between particles in interstellar clouds causes them to collapse and form protostars. Therefore, both phenomena are caused by gravitational force.
Answer: (B)

Question

What is between the orbits of Mars and Jupiter?

A. the asteroid belt
B. the orbit of Saturn
C. the orbit of the Earth
D. the orbit of Venus

▶️ Answer/Explanation
The asteroid belt is a region of space containing many rocky bodies (asteroids) located between the orbits of Mars and Jupiter.
This is a key feature of our Solar System’s structure. Saturn, Earth, and Venus are planets with their own orbits at different distances from the Sun.
Answer: (A)

Question

Which row shows a dwarf planet and an object that orbits a planet?

▶️ Answer/Explanation
Pluto is classified as a dwarf planet. A moon (natural satellite) is an object that orbits a planet. Mercury is a planet, not a dwarf planet. Asteroids orbit the Sun, not planets. Therefore, row C is correct.
Answer: (C)
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