3.  Sound is energy that travels in the form of waves away from a vibrating object. What is Sound?

4.  Sound waves travel through all three states of matter.  Can you identify the three states of matter in this picture? Sound Travels

5.  Sound travels through the air. Gas

6.  Sound travels through liquids, such as water. To hear whales songs underwater click hereclick here Liquid

7.  Sound travels through solids such as a floor, or dock. Solids

8.  Sound cannot travel through a vacuum, which has no matter.  This includes space because there is no matter in space. Sound CANNOT Travel in Space

9.  Sound is a form of energy that travels in waves.  These waves are called “compression waves.” Sound Waves

10. Video: How is Sound Made?

11. Explore the Sound Waves

12. A scientist puts a bell inside a sealed glass jar. She makes the bell vibrate. Then, she sucks all the air out of the jar with a vacuum pump. She makes the bell vibrate again. Describe what the scientist probably heard when she made the bell vibrate each time. Explain your answer. Let’s Experiment

13.  The highness or lowness of a sound is known as the pitch. Pitch

14. High Pitch  A high pitch has a high frequency. It has many ‘peaks’ in the wave.

15.  A low pitch has a low frequency. It has few ‘peaks’ in the wave. To learn more about pitch click hereclick here Low Pitch

16.  Science and Technology > 3.1.4.C.1 Identify Observable Patterns  Science and Technology > 3.2.4.B.1 Recognize observable descriptors from each of the five senses  Science and Technology > 3.4.4.C.1 Identify characteristics of sound  For more on the PA Standards click hereclick here Pennsylvania State Standards