Stars and the Universe — Paper 1 · IGCSE Physics (9-1) 0972

39 A radiation detector records a low reading even when no radioactive source is close. This is due to background radiation. What does not contribute to this background radiation? A rocks on Earth B cosmic rays from the Sun C satellite TV signals D waste from nuclear power stations

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2020

39 The Sun consists mostly of two elements. What are these two elements? A helium and nitrogen B hydrogen and helium C hydrogen and oxygen D oxygen and nitrogen

1 marks

Answer: B

This question in 0972/11 May/June 2023

40 Which statement about the Milky Way is correct? A It is a galaxy. B It is a group of galaxies. C It is a group of stars outside our own galaxy. D It is a group of stars which are part of our galaxy.

1 marks

Answer: A

This question in 0972/11 May/June 2023

39 The graph shows the energy radiated by the Sun at different wavelengths. Most of the energy is radiated in just three parts of the electromagnetic spectrum, labelled P, Q and R. energy radiated 0 0 P Q R wavelength Which parts of the electromagnetic spectrum are P and R? P R A gamma ray radio B infrared ultraviolet C radio gamma ray D ultraviolet infrared

1 marks

Answer: D

This question in 0972/12 May/June 2023

40 An astronomer observes redshift in the light from a distant galaxy. Which statement about redshift is correct? A It is the decrease in the observed wavelength of red light emitted from receding galaxies. B It is evidence that the Universe is contracting and supports the Big Bang Theory. C It is evidence that the Universe is expanding and supports the Big Bang Theory. D Redshift is when light from receding galaxies appears blue.

1 marks

Answer: C

This question in 0972/12 May/June 2023

39 Which statement about the Sun is correct? A The Sun is a dwarf star consisting mostly of hydrogen and oxygen. B The Sun is a giant star consisting mostly of helium and carbon dioxide. C The Sun is a medium-sized star consisting mostly of hydrogen and helium. D The Sun is a medium-sized star consisting mostly of nitrogen and oxygen.

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2023

40 Which quantity does a light-year measure? A an angle B a distance C a speed D a time

1 marks

Answer: B

This question in 0972/11 Oct/Nov 2023

39 What are the three main types of radiation emitted by the Sun? A infrared, radio waves and ultraviolet B infrared, visible light and ultraviolet C microwaves, visible light and X-rays D radio waves, X-rays and ultraviolet

1 marks

Answer: B

This question in 0972/11 May/June 2024

40 What is a light-year? A the time for light to travel 1 km in space B the time for light to travel from the Sun to the Earth C the distance travelled in space by light in one year D the distance travelled by light from the Sun to the Earth

1 marks

Answer: C

This question in 0972/11 May/June 2024

39 What makes up the Universe? A many billions of galaxies B Mercury, Venus, the Earth, Mars, Jupiter, Saturn, Uranus and Neptune only C the Sun, the Earth and the Moon only D the Solar System only

1 marks

Answer: A

This question in 0972/12 May/June 2024

40 The Sun mostly consists of which gases? A helium and hydrogen B helium and nitrogen C hydrogen and oxygen D oxygen and nitrogen

1 marks

Answer: A

This question in 0972/12 May/June 2024

39 Which row describes the Sun and the Milky Way? the Sun the Milky Way A a galaxy a galaxy B a galaxy a star C a star a galaxy D a star a star

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2024

40 What is the approximate diameter of the Milky Way? A 100 light-years B 1000 light-years C 10 000 light-years D 100 000 light-years

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2024

39 Electromagnetic radiation from distant galaxies is redshifted when observed from the Earth. This is evidence that supports the Big Bang Theory. Which statement is correct? A Light from galaxies that are moving towards the Earth is redshifted. B Redshift is an increase in the wavelength of electromagnetic radiation. C The Big Bang Theory says that the Solar System is expanding out into the Universe. D The Big Bang Theory says that, billions of years ago, the Universe expanded to its current size in a few seconds.

1 marks

Answer: B

This question in 0972/11 May/June 2025

40 Which statement about the Milky Way is correct? A It is a galaxy made up of billions of stars. B It is a group of galaxies in our Solar System. C It is all the stars that we can see in the night sky. D It is the path taken by a comet when it gets close to the Sun.

1 marks

Answer: A

This question in 0972/11 May/June 2025

40 The Sun radiates most of its energy in three regions of the electromagnetic spectrum. The diagram shows the proportion of the total energy radiated in each of these regions. Q R P Region P is visible light and region Q is ultraviolet. What is region R? A infrared B microwaves C radio waves D X-rays

1 marks

Answer: A

This question in 0972/12 May/June 2025