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CIE iGCSE Co-Ordinated Science P6.1 The Solar System Exam Style Questions Paper 2

CIE iGCSE Co-Ordinated Science Paper 2 - All Chapters

Question

Planet X and planet Y orbit the Sun and are at different distances from the Sun. The gravitational field strength of the Sun is greater at the position of planet X than it is at the position of planet Y.

Which row compares the distances from the Sun and the orbital speeds of planet X and planet Y?

▶️ Answer/Explanation
Gravitational field strength is stronger closer to the Sun. So planet X is closer (less distance). Orbital speed is faster for closer planets (Kepler’s laws). Thus planet X has less distance and greater orbital speed.
✅ Answer: (C)

Question

Which object is mainly responsible for the energy stored in tides in the sea?

A. Mars
B. the Earth
C. the Moon
D. the Sun

▶️ Answer/Explanation
Tides are caused mainly by the gravitational pull of the Moon on the Earth’s oceans, since it is much closer than the Sun despite being far less massive.
The Sun has a smaller secondary effect on tides, while Mars and the Earth itself are not the driving cause.
✅ Answer: (C)
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