Paper 1 Answer all questions. Each question is followed by four options, A, B, C and D. For each question, choose one answer only.
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1 hapter 26 Stars and Galaxies Paper 1 nswer all questions. Each question is followed by four options,,, and. For each question, choose one answer only. 1. X The figure above shows the Solar System. Which of the following is true about X? X is a planet onsists of oxygen Has low temperature Nuclear reaction takes place in its core 2. The Sun is born from a nebula red giant white dwarf supernova 3. Which part of the Sun produces a lot of heat as a result of the nuclear reaction that occurs in it? orona ore Photosphere hromosphere 4. Which of the following is not an effect of prominence and sunspot on Earth? Interference to telephone system Interference to radio communications system Volcanic eruptions and earthquakes Produces aurora at the Earth's poles 5. Which of the following is the hottest star? blue star yellow star n orange star white star 1
2 6. The figure above shows a cloud of dust and gas consisting of hydrogen and helium. How is it that the dust and gas can form a very hot and compact core during the birth of a star? Very low pressure in space causes the dust and gas to become compressed. The dust and gas contract and compress as a result of being pulled by gravitational force. Very high temperature at the centre causes the dust and gas to attract one another. The dust and gas combine as a result of the nuclear reaction in its centre. 7. S: White core cools T: Star expands U: The material in the outer part of the star escapes into space The steps shown above occur when a star dies. Which of the following is the correct sequence of events? S, T, U T, U, S U, T, S U, S, T 8. Which of the following probably forms at the end stage in the death of a star with a size bigger than the Sun? White dwarf Red giant Sunspot Neutron star 9. Which of the following is produced as a result of the collision of charged particles from the Sun with air molecules at the Earth's poles? Typhoon Sunspot urora Prominence 2
3 10. The figure above shows a galaxy. It is known that the Sun is situated in this galaxy. Which of the following is true about this galaxy? I It consists of millions of stars. II It is the only galaxy in space. III The Sun and other stars move around the centre of this galaxy. I only III only 11. The figure above shows the transformation of a star to become other objects after a big explosion. Which of the following is true about star X? I It spins and radiates radio waves in the form of pulses. II It cools and leaves a black body. III The star's core contracts and becomes a white dwarf. I only III only 12. Which of the following phenomena of the Sun interferes with the telephone, radio and television signals? I Sunspot II Solar flare III Prominence I and II only I 3
4 13. The figure above shows the layers of the Sun. Which of the layers labelled K, L, M and N is responsible for supplying the energy for photosynthesis in green plants on Earth? K L M N 14. The figure above shows constellations P, Q, R and S. Which of the following was used for direction by sailors in the past? I P II Q III R I and II only I 4
5 15. Which of the following celestial bodies is formed by the fusion of hydrogen atom as shown in the reaction above? omet Star Meteor steroid Paper 2 nswer the question. The figure above shows a phenomenon that occurs frequently in the Sun. (a) Name the phenomenon shown in the above figure. (b) t which part of the Sun's layers does this phenomenon occur? (c) What causes this phenomenon? (d) Name two other phenomena that occur in other layers of the Sun. (i) (ii) (e) Name two communications systems on Earth that are disrupted by charged particles coming from the Sun. 5
6 nswers: Paper Paper 2 (a) Sunspot (b) Photosphere (c) The region is much cooler than other regions on the Sun's surface. (d) (i) Solar flare (ii) Prominence (e) Radio and television broadcasts / telephone calls 6
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