2024HSCShort answer

Q22 (a)

2 marks

Question

The following graph, based on the data gathered by Hubble, shows the relationship between the recessional velocity of galaxies and their distance from Earth.
Describe the significance of the graph to our understanding of the universe.

Try the question before revealing the answer.

Solution

Criteria	Marks
Describes the significance of the graph	2
Provides some relevant information	1

Sample answer: The graph shows that the further away the galaxy, the faster it is receding. From this it was concluded that the universe is expanding.

Supplied marking guidance · human reviewed

Compare this with your working, not only your final sentence.

Syllabus alignment

Module 8 · From the Universe to the Atom

Origins of the ElementsAnalyse Big Bang evidence, Hubble's observations and expansion of the universe.

Spot a problem? Send feedback