Stars and Space GCSE Physics AQA (higher) blahblahblah quiz on every sentence etcetc. 4.0 / 5 based on 5 ratings ? PhysicsAstronomyGCSEAll boards Created by: Some like it hotCreated on: 27-05-12 20:17 How long ago was the "Big Bang" theory? 13 billion years 1 of 28 What was the universe at first? A big ball of radiation 2 of 28 What happened in the first few minutes? Nuclei of the lightest elements formed 3 of 28 What happened as it expanded? The temperature fell 4 of 28 Charged/uncharged atoms were formed. uncharged 5 of 28 Dust and gas were then pulled together to form..... stars 6 of 28 What force was used to do this? gravitational attraction 7 of 28 What reaction did this heat produce? nuclear fusion 8 of 28 Then what happened? More dust and matter formed planets 9 of 28 What are large groups of stars called? Galaxies 10 of 28 What is a Universe? a large group of galaxies 11 of 28 Gravitational forces make clouds of dust and gas become increasingly dense, what does this form? protostar 12 of 28 As this becomes denser, it gets hotter. What happens next? nuclei of light elements start to fuse together 13 of 28 How does this become a star? Energy is released, and the core gets hotter and brighter 14 of 28 How long does this stage last for? billions of years 15 of 28 Why is it stable? Because the inward force of gravity and outward pressure of radiation are balanced 16 of 28 What is it called during this process? a main sequence star 17 of 28 What happens when the star runs out of hydrogen nuclei? It becomes a red giant 18 of 28 What happens next if it has a high mass? It becomes a supernova 19 of 28 Then what? The core of the explosion is left - a neutron star 20 of 28 What happens next if there is sufficient mass? It becomes a black hole 21 of 28 What happens to Q18 if it has a low mass? It becomes a white dwarf 22 of 28 Then what? It becomes a black dwarf 23 of 28 How are chemical elements formed? fusion processes 24 of 28 What happens? Nuclei of lighter elements fuse together 25 of 28 Why is this? Because it requires energy 26 of 28 How do elements get distributed through space? by the supernova 27 of 28 What is the evidence that the sun and inner planets were formed from a supernova explosion? they have heavier elements 28 of 28
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