Stars form and undergo a complex life cycle over billions of years.
What is the name given to the massive interstellar cloud of gas and dust that serves as the birthplace of stars?
Which fundamental force is responsible for the inward collapse of a molecular cloud that leads to the formation of a protostar?
Complete the sentence: During the main sequence phase of a star like our Sun, hydrogen nuclei undergo nuclear fusion / fission / decay to form helium nuclei, releasing energy.
X-rays and infrared radiation are emitted from the surface of an active star and travel across the vacuum of space to an orbiting telescope. Which statement correctly describes the time taken for these two types of radiation to travel this distance?
X-rays have a much shorter wavelength than infrared radiation. Complete the sentence: Compared with the frequency of infrared radiation, the frequency of X-rays is smaller / the same / greater.
A hot young protostar and a cooler star of the same surface area both emit thermal radiation. Compare the rate of infrared radiation emitted by the hotter protostar with that of the cooler star, and give a reason for your answer.
Practise AQA GCSE Physics Solar system; stability of orbital motions; satellites (physics only) with exam-style questions for Foundation and Higher tier. 27 questions covering Our solar system, The life cycle of a star, and Orbital motion, natural and artificial satellites, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.