Q39 of 0625_m23_qp_12

Question 39

Question 39 of 40

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No letter options?

Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.

A 1, 2 and 3 are correct

B 1 and 2 only are correct

C 2 and 3 only are correct

D 1 only is correct

Topics Tested

6. Space physics

6.2.1. The Sun as a star

Know that the Sun is a star of medium size, consisting mostly of hydrogen and helium, and that it radiates most of its energy in the infrared, visible light and ultraviolet regions of the electromagnetic spectrum

6. Space physics

6.1.2. The Solar System

Know that the Sun contains most of the mass of the Solar System and this explains why the planets orbit the Sun

5. Nuclear physics

5.1.2. The nucleus

Know the relationship between the nucleon number and the relative mass of a nucleus