Describe the structure of a neutral atom of lithium-7, 37Li\text{}^{7}_{3}\text{Li}37Li.
The Sun is a stable main-sequence star.
State what happens to hydrogen nuclei during the primary nuclear fusion process in the Sun.
State two regions of the electromagnetic spectrum through which the Sun radiates the majority of its energy.
Describe what occurs to a star of similar mass to the Sun once the hydrogen fuel in its core is depleted.
25 exam-style questions on CIE IGCSE Physics 6.2.2a Galaxies and astronomical distances. Each one has a worked solution and a mark scheme showing where the marks go.