1 . Get a meter stick and a pencil. 2 . Hold the meter stick close to your ear. Have a partner scratch the other end of the meter stick with a pencil • What happens? 3. Hold the meter stick away from your ear and repeat the activity. • Did you hear a softer or louder sound? • Where does sound travel faster? In solid or in air? Why do you think so? 4. Get a big pail of water. Get 2 pieces of stones and hit them together under water inside the pail. Now, hit them together out of water. • Did you hear sounds when you hit the two stones together outside the pail and underwater? Why? ​