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PIMSO 2025 - Science - Primary 4 - National Round Question 26

PIMSO Science · PIMSO 2025 - Science - Primary 4 - National Round

Question 26

An asteroid is a chunk of rock and metal in outer space that is in orbit around the Sun. Asteroids vary in size from just a few feet across to hundreds of miles in diameter. Which of the following could not be a characteristic of an asteroid?
Question illustration
A. made up mostly of rocks rich with the element carbon
B. made up of mostly rock and some metals
C. primarily made up of iron and nickel
D. made up of some other minerals such as diamond and gold
Editorial response: Explain the scientific reasoning and the unresolved limitation of the source choices.