1. Thursday, June 23, 2016 B-Day Objective: YWBAT explain how sound is caused by vibrations and transmits energy. Drill: What properties of waves affect the pitch and loudness of sound? Sit in alphabetical order by last name for the rest of the week. Homework Play Outside!!

2. Answer The frequency of sound wave affects the pitch of the sound, and the amplitude of sound wave affects the loudness of the sound.

3. Did you know…? The vibrations that produce your voice are made inside your throat. When you speak, laugh, or sing, your lungs force air up your windpipe, causing your vocal cords to vibrate.

4. Today’s Activities  Drill  Partner Read Chapter 21 – Section 1  Complete the Review Questions page 538 in Classroom  Conclusion

5. Closure Why does everything seem so quiet after a snowfall?

6. Conclusion Answer Snow does not reflect sound waves; it absorbs them.