A planetarium caption states that the universe began in a very small region. The editor needs to add a description of the physical conditions in this region.
What does the Big Bang theory suggest should be added to the caption?
It was extremely hot and dense
It was extremely hot and had a low density
It was cool and dense
It was cool and had a low density
79 exam-style questions on AQA GCSE Physics 8.2 Red-shift, covering 8.2 Red-shift. Each one has a worked solution and a mark scheme showing where the marks go.