1) The model of the solar system that puts the Sun at the centre is called the.......... a) heliocentric b) geocentric c) earthocentric d) sunocentric 2) What is the focal length of a lens? a) the distance between the object and the lens b) the distance between the lens and the image c) the distance between the object and the image d) the distance between your eye and the lens 3) What happens when a light wave meets the boundary between different materials? a) reflection b) refraction c) diffraction d) dispersion 4) When a wave refracts it changes... a) speed b) direction c) speed and direction d) colour 5) Who discovered the moons of Jupiter? a) Copernicus b) Newton c) Herschel d) Galileo 6) What does the eyepiece lens of a telescope do? a) magnifies the object b) forms a real image of the object c) magnifies the real image d) magnifies your eye 7) The image formed by a converging lens is upside down. a) True b) False 8) Waves transfer..... a) energy b) matter c) particles d) information 9) Sound waves are.... a) transverse b) longitudinal c) vibrational d) cyclical 10) What does a frequency of 1Hz mean? a) one wave passes every minute b) the wavelength is 1m c) one wave passes every second d) the amplitude is 1 11) If the wavespeed is 300m/s, and the wavelength is 2m. What is the frequency? a) 150Hz b) 0.006Hz c) 15Hz d) 600Hz 12) Which of these is the formula for wave speed? a) speed = frequency x wavelength b) speed = frequency / wavelength c) speed = distance / time d) speed = distance x time 13) A telescope which has 2 converging lenses is called.... a) reflecting b) refracting c) diverging d) converging

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