Complete the sentences about the life cycle of stars.
High-mass stars begin their lives in large clouds of gas and dust called ...................................................\text{...................................................}...................................................
During the stable main sequence phase, the inward force of ...................................................\text{...................................................}................................................... is balanced by the outward ...................................................\text{...................................................}...................................................
Towards the end of its life, a star much more massive than the Sun expands and cools to become a ...................................................\text{...................................................}...................................................
When a high-mass star's core ceases fusion and collapses, it undergoes a massive explosion called a ...................................................\text{...................................................}..................................................., leaving behind a neutron star or a black hole.
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.