Physics P8 (Space Physics) 0.0 / 5 ? PhysicsAstronomyGCSEAQA Created by: julian hayterCreated on: 03-02-22 17:05 What is in our solar system? 1 star, the Sun, 8 planets, dwarf planets, natural satellites, the moons that orbit planets 1 of 25 What is our solar system a small part of? the milky way galaxy 2 of 25 How was the sun formed? from a cloud of dust and gas (nebula) pulled together by gravitational attraction 3 of 25 What reactions has lead to an euqilibrium between the gravitational collapse and expansion of a star? fusion reactions 4 of 25 What is the life cycle of a star determined by? the size of the star 5 of 25 what is the life cycle of a star the same size (or smaller) than the sun? nebula, protostar, main sequence star, red giant, white dwarf, black dwarf 6 of 25 what is the life cycle of a star bigger than the sun? nebula, protostar, main sequence star, red super giant, supernova, neutron star or black hole 7 of 25 what in stars produces all of the naturally occurring elements? fusion processes 8 of 25 what elements are produced in a supernova? elements heavier than IRON 9 of 25 what is a supernova? an explosion of a massive star 10 of 25 What elements in a star fuse together and what element does this form? 2 hydrogen atoms form 1 helium atom 11 of 25 in terms of orbits, what does gravity provide? the force that allows planets and satellites to maintain their circular orbits 12 of 25 in circular orbits, what can the force of gravity lead to? a change in velocity 13 of 25 what doesn't change? speed 14 of 25 Why does velocity change but speed doesn't? velocity has a direction (vector) and speed doesn't (scalar). 15 of 25 do planets have a faster speed or slower speed if they are further away from the sun? slower speed 16 of 25 Why? The gravitational pull is weaker 17 of 25 if the speed changes, what else must change? the radius 18 of 25 from the most distant galaxies, what is there an observed increase in? the wavelength of light 19 of 25 if the galaxies are further away, what is their speed and wavelength like? the faster they are moving and the bigger observed increase in wavelength 20 of 25 What is this effect called? Red-shift 21 of 25 What does red-shift provide evidence for? that space itself is expanding and supports the Big Bang Theory 22 of 25 What does the Big Bang Theory suggest? that the universe began from a very small region that was extremely hot and dense 23 of 25 What is red-shift? the expansion stretches out light waves further left of the electromagnetic spectrum 24 of 25 What is blue-shift? an object moving towards us pushes light waves closer together further right of the electromagnetic spectrum 25 of 25
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