3. In which of the following will sound travel slowest?
A. Air B. Glass
C. Salt Water D. Water
4. What causes echo?
A. Sound waves bouncing off large, hard surfaces
B. Sound waves bouncing off carpet
C. Sound waves bouncing off tables and chairs
D. You repeating yourself
5. What energy is made of vibrations that travel through a medium.?
A. Heat energy B. Sound Energy
C. Light Energy D. Mechanical Energy
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