physics topic 8 0.0 / 5 ? PhysicsEarth in spaceGCSEAQA Created by: Jazzyb060403Created on: 18-04-19 12:55 explain the lifecycle of a small star nebula, protostar, main sequence star, red giant, white dwarf, black dwarf 1 of 31 explain the lifecycle of a massive star nebula, protostar, main sequence star, red super giant, supernova, neutron star 2 of 31 explain the lifecycle of a really massive star nebula, protostar, main sequence star, red super giant, supernova, neutron star, black hole 3 of 31 what type of star is the sun a small star 4 of 31 what is a nebula a cloud of dust and gas 5 of 31 how is a protostar formed gravity pulls dust and gas together and temperature starts to rise 6 of 31 why is a main sequence star stable the outward pressure from nuclear fusion is in equillibrium with the gravity pulling it inwards 7 of 31 what causes a red giant to emerge the hydrogen runs out and the outer part of the star begins to cool so turns red whilst the core forms heavier elements 8 of 31 how is a white dwarf formed the red giant ejects the outer layer of dust and gas to leave a hot core behind 9 of 31 what creates a black dwarf a white dwarf cools down and emits less energy 10 of 31 how is a supernova made more fusion occurs in a red super giant which causes it to heat more and explode 11 of 31 how are elements heavier than iron made by supernovas that eject the new elements into the universe to form new planets and stars 12 of 31 how is a neutron star made a supernova throws the outer layer of dust and gas into space, leaving a dense core behind 13 of 31 how is a black hole formed a neutron star is so dense that it forms a black hole 14 of 31 what is the centre of our solar system the sun 15 of 31 what four things are included other than the sun in our solar system planets, dwarf planets, moons and artificial satellites 16 of 31 what is the difference between a planet and a dwarf planet a planet has a gravity strong enough to have pulled in any nearby objects, dwarf planets are too small to do this. 17 of 31 what shape do objects orbit in an elliptical 18 of 31 what are objects that are orbiting constantly doing increasing in acceleration and velocity 19 of 31 where does the force acting on an orbiting object go towards and what is the name of this type of force it acts towards the centre of the circle and is centripetal force 20 of 31 the stronger the centripetal force... the faster the object needs to travel 21 of 31 the further away an object is from the centripetal force... the slower it travels 22 of 31 what is the universe always doing expanding 23 of 31 what has increased from other galaxies the wavelength of light 24 of 31 what is red-shift when wavelengths of light increase so much they fall closer to the red end of the spectrum 25 of 31 would more distant galaxies have greater or lesser red-shift than nearer ones greater 26 of 31 what is seen when a galaxy is moving towards us blue-shift, the wavelengths become shorter 27 of 31 what theories are there about the future expansion of our universe it will shrink again, it will continue to expand at the same rate, it will stop expanding or it will expand faster 28 of 31 what has been observed recently about the expansion of our universe it is getting faster 29 of 31 what is dark matter an unknown substance that holds galaxies together 30 of 31 what is dark energy what is thought to be responsible for the accelerated expansion of the universe 31 of 31
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