Space 0.0 / 5 ? PhysicsEarth in spaceGCSEAQA Created by: morganevans261Created on: 25-03-19 17:02 What is Earth's natural Satellite? The moon 1 of 21 What is the order of planets in the Milky Way? Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune 2 of 21 What are the two forces within a star? Gravity-pushing inwards. Nuclear fusion- pushing outwards. They are balanced in equilibrium 3 of 21 What is step one of the star lifecyle? Nebula- a cloud of dust and mainly hydrogen gas 4 of 21 What is step two of the star lifecyle? Protostar- heats and hydrogen forms helium 5 of 21 What is step three of the star lifecyle? Nuclear fusion has occured- now a star in main sequence 6 of 21 What is step four of the star lifecyle? (same size as sun) Collapse as gravity is stronger than nuclear fusion (hydrogen used up) 7 of 21 What is step five of the star lifecyle? (same size as sun) Increases temperature and helium fuses to form other elements 8 of 21 What is step six of the star lifecyle? (same size as sun) RED GIANT 9 of 21 What is step seven of the star lifecyle? (same size as sun) When it stops fusing helium it becomes a WHIE DWARF then a BLACK DWARF 10 of 21 What is step four of the star lifecyle? (bigger than sun) Expand to form a RED SUPERGIANT 11 of 21 What is step five of the star lifecyle? (bigger than sun) Helium fuses to form other elements 12 of 21 What is step six of the star lifecyle? (bigger than sun) Explodes as a SUPERNOVA which creates elements heavier than iron 13 of 21 What is step seven of the star lifecyle? (bigger than sun) Either a NEUTRON STAR or a BLACK HOLE 14 of 21 What is Red shift? Redshift describes how light shifts toward shorter or longer wavelengths depending on distance 15 of 21 What is Red shift used as evidence for? Big bang as it shows expansion 16 of 21 What is Red shift of further away planets? Bigger Red shift as they move faster away from earth 17 of 21 What is orbital motion? The motion of an object in an orbit around a fixed point 18 of 21 What is the orbital motion of earth and the moon? A circular orbit 19 of 21 What changes and stays constant as things orbit? Velocity- changes Speed-constant 20 of 21 What happens if the speed of a satallite is increased? Radius must decrease so gravity from earth can hold it so it doesn't fly off 21 of 21
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