1) Which of these are NOT base SI units?  a) metre b) kilogram c) mile d) Kelvin e) Joule f) second 2) Choose a base SI unit. a) milimetre b) centimetre c) metre d) kilometre 3) Which prefix means 102 x the key unit? a) kilo (k) b) giga (G) c) mili (m) d) tera (T) 4) A kilogram is then how many grams? a) 10 b) 100 c) 1000 5) Milli (m) means a) 10-2 or 1/100 b) 106 or 1,000,000 c) 10-1 or 1/10 d) 10-3 or 1/1000 6) 1 m = ______ mm a) 102 b) 103 c) 106 d) 100 7) What prefix does the abbreviation μ stand for? a) nano b) mili c) ultra d) micro e) centi f) giga 8) When energy spreads through a medium, this is called... a) a wave b) amplitude c) a trough d) the frequency of a wave 9) Which of these is NOT a property of waves? a) refraction b) interference c) crest d) diffraction e) reflection 10) The time it takes the wave to repeat itself or pass a point is called... a) wavelength b) period 11) Wavelength is... a) how long a wave is in time b) how long a wave is in space 12) How is wave speed calculated? a) Wave speed = frequency ÷ wavelength b) Wave speed = wavelength ÷ frequency c) Wave speed = frequency × wavelength 13) What is the name of the distance from peak to peak of a wave? a) wavelength b) frequency c) amplitude 14) What is the unit of measurement for frequency? a) A b) m/s c) Hz d) s 15) Sound waves are... a) longitudinal waves b) transverse waves 16) Which of these is an example of a transverse wave? a) sound wave b) water wave c) seismic P-wave 17) How do oscillations move in a longitudinal wave? a) parallel to the direction of wave travel / in the same direction b) perpendicular (at a right angle) to the direction of wave propagation c) randomly 18) A wavefront is a) How many times the wave repeats itself per second b) A wave in which the displacement of the medium is perpendicular to the propagation of the wave c) A graphical representation of a wave drawn perpendicular to the direction of propagation and spacing proportional to wavelength 19) Perpendicular means... a) at a right angle (90 degrees) b) parallel c) horizontal d) in a full circle (360 degrees) 20) What is the range of human hearing? a) 40 - 40 000 Hz b) 10 - 100 000 Hz c) 100 - 20 000 Hz d) 20 - 20 000 Hz e) 25 - 25 000 Hz 21) What is an ultrasound? (pick two) a) A sound with a frequency higher than the greatest frequency humans can hear b) A sound with a frequency of 10 000 Hz c) A sound with a frequency greater than 20 000 Hz 22) This is a representation of... a) wave frequency b) an ultrasound c) Snell's law d) vacuum 23) When a light ray is incident at angle greater than or equal to the critical angle, so all light is refracted is called a) the angle of refraction b) Snell's law c) critical angle d) total internal reflection 24) Choose answers that belong to the seven bands of the Electromagnetic (EM) spectrum. a) ultrawave b) radio wave c) refractive wave d) gamma ray e) ultraviolet f) microwave

G9 Physics Revision

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