1) What starts a sound? a) someone talking b) an explosion c) vibrations 2) Sound can travel through liquids a) True b) False 3) Sound can travel through solids a) True b) False 4) Sound can travel in outer space a) True b) False 5) Sounds can travel in gases a) True b) False 6) To make a sound louder the vibrations must be ... a) Bigger b) The same size c) Smaller 7) In what direction do sounds travel? a) Upwards b) Downwards c) All directions 8) To make a sounds higher the vibrations must be ... a) Faster b) The same speed c) Slower

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