Sound waves travel slowest through a _____

Sound waves travel fastest through a ______

Our __________ vibrates when we talk and sing

Human's, __________ and thunder are examples of natural sources of sound

Why can't we hear sound in space?

What happens to our hearing if we listen to loud noises all the time?

How can we protect our ears from hearing loss?

What sound source is the loudest?

Which of these instruments produce sound by shaking?

This instrument makes sound be __________

Which of these instrument make sound by pulling?

Which is not a way to produced sound?

Which one gives out sound?

from the picture above, we know that sounds are made when things or air ___________.

below are some ways to make things vibrate and produce sounds, except....

The ___________________ is how loud or soft a sound is.

Adam flicked a ruler gently, he heard soft sound. Then, Adam flicked it stronger and he heard louder sound. it means, small vibration produce _______ sounds while large vibration produce ________ sounds

sound can travel through the three different states of matter: solid, liquid, gases. it travels best in which states of matter?

Adam is in his bedroom. He could hear the siren of ambulance on the street because of the following reasons, except...