4. The student wants to investigate how sound waves from the straw horn interact with different
materials. Which wave property should be tested and which method should be used to test it?
A. Wave property: absorption
Method: playing the straw horn in a room with hard surfaces and a room with soft
surfaces
B. Wave property: absorption
Method: making several sounds from straws of different lengths
C. Wave property: pitch
Method: playing the straw horn a room with hard surfaces and a room with soft
surfaces
D. Wave property: pitch
Method: making several sounds from straws of different lengths