Sound is a ____ of the molecules of matter. Sound can travel through different types of ____. When whales communicate underwater, it shows that sound travels through ____. When you listen to the teacher in the classroom, it shows that sound travels through ____. When you hear a knock on the door, it shows that sound travels through ____. Sound has ____. It is measured in decibels Volume is how ____ or soft a sound can be. Echo is produced when sound is ____.

Sound quiz. Choose the best word to complete the statements about sound.

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