P1 0.0 / 5 ? PhysicsP1GCSEOCR Created by: toriibruntonCreated on: 03-05-17 19:01 What is the centre of the solar system? the sun 1 of 31 How many planets are in the solar system eight 2 of 31 name 6 things in the solar system comets, asteroids, moons, dwarf planets, stars, planets 3 of 31 how far is one light year 9.5 million kilometres 4 of 31 what is relative brightness how bright a star seems, and how close it looks because of it 5 of 31 what is parallax The idea of a star on the fixed background of other moving stars 6 of 31 How did the sun appear Nuclear Fusion. Hydrogen nuclei jammed together to form the element helium. 7 of 31 how and when was the solar system created a collapsing cloud of gas and dust, 5000 million years ago 8 of 31 what is redshift increase in wavelength from a moving away galaxy. 9 of 31 wha is magnetite particulate in rocks that aligns with the earth's magnetic field 10 of 31 why is magnetite important it shows us when are possibly where the rock was formed 11 of 31 who's theory is continental drift Alfred Wegener 12 of 31 What was his theory All continents used to be one, they drifted apart 13 of 31 What was Wegener's evidence similar fossils on different continents, they fit together like a jigsaw, similar rocks on different continents 14 of 31 Why was his theory disproved could have been bridges, animals could have swam, he was not a geologist 15 of 31 what is a convection current the magma below the earths crust cooling and solidifying, sinking then melting and rising again. 16 of 31 What is seafloor spreading the seafloor between continents moving apart due to convection currents 17 of 31 Where do oceanic ridges form on the expanding seafloor where liquid mantle fills the gap and cools 18 of 31 where do tectonic plates meet at a plate boundary 19 of 31 Structure of the earth from inside to out core (liquid iron), Outer core (liquid nickle and iron), inner core (solid nickle and iron), Crust (solid rock floating on mantle) 20 of 31 What are P waves Primary waves, move quickly through solid and liquid 21 of 31 What are S waves Secondary waves, move slowly through Solid 22 of 31 What does Longitudinal mean particles vibrate along the direction of motion (p waves) 23 of 31 what does Transverse mean particles vibrate along right angles to the direction of motion (s waves) 24 of 31 Why do we know the core of the earth is liquid only P waves can pass through it 25 of 31 Define amplitude maximum height of the wave (disturbance) 26 of 31 define wavelength distance from one maximum height to the next 27 of 31 wave speed equation speed = Distance travelled÷time taken 28 of 31 what is the frequency of a wave number of vibrations in one second 29 of 31 Wave speed with frequency wavespeed = frequency x wavelength 30 of 31 wave distance equation Distance travelled = wave speed x time of travel 31 of 31
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