1) What do waves carry from place to place a) energy, but not matter b) matter, but not energy c) both energy and matter d) neither energy nor matter 2) How do we hear sounds? a) wind carries sound to us b) sound waves make our ear drums vibrate c) light waves signal our brains to hear sound waves d) air carries sound waves 3) What type of waves can travel through empty space? a) mechanical waves b) sound waves c) water waves d) electromagnetic waves 4) Waves that need matter to carry energy are called? a) matter of fact waves b) sound waves c) mechanical waves d) electromagnetic waves 5) What is the highest point of a wave a) crest b) trough c) amplitude d) frequency 6) What is the lowest point of a wave? a) crest b) trough c) amplitude d) frequency 7) What is the distance between the centre of a wave and its crest? a) crest b) trough c) amplitude d) frequency 8) How is frequency or waves per second measured? a) Joules b) Newtons c) Hertz d) Gauss 9) Which of these are not electromagnetic waves a) micro waves b) sound waves c) radio waves d) x-rays 10) Where do ultraviolet waves come from? a) the moon b) the earth c) the atmosphere d) the sun 11) Refraction is... a) when a wave changes velocity in a medium of different density b) the opposite of reflection c) when a wave changes direction d) only possible when water waves pass from a deep zone over a shallow zone 12) the lowest frequecy humans can hear is ? a) 50Hz b) 20Hz c) 200HZ d) 5Hz 13) Which of these is not a use of Ultrasound ? a) Cleaning teeth b) Monitoring foetuses c) Echo location for bats d) Sending signals to satellites

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