1) An example of artificial sound? a) the TV b) A dog c) The wind d) Waterfall 2) An example of a natural sound? a) car´s horn b) helicopter c) phone d) Lion 3) In what mediums does sound travel? a) Liquid b) Solid c) Gas d) none of them 4) Definition of sound a) sound travels in the space b) Has many different origins c) it is produced by a vibration d) is a type of energy 5) Sound travels in: a) one direction b) all directions c) straight lines d) doesn´t travel 6) What is the most common sense to hear sounds? a) smell b) sight c) hearing d) taste 7) What organ receives and recognizes the different sounds? a) Heart b) Brain c) Stomach d) Lungs 8) This example represents: a) Sound travels in solid medium b) Sound travels in liquid medium c) Sound travels in gas medium d) Sound doesn´t travels 9) This example represents: a) Sound travels in solid medium b) Sound travels in liquid medium c) Sound travels in gas medium d) Sound doesn´t travels 10) This example represents: a) Sound travels in solid medium b) Sound travels in liquid medium c) Sound travels in gas medium d) Sound doesn´t travels

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