Italicized font represents information to be shared orally or physically completed with the students at this time.

The non-italicized font represents additional information included to support the teacher’s understanding of the content being introduced within the CELL.

ANALYZE IT

Instruct students to complete the Analysis Questions in their SDRs then discuss them as a class. Use the suggested responses below to guide students’ answers.

• How did the molecules of the gasses in the air react to the vibrations of the meter stick? The vibrations of the meter stick caused the gas molecules in the air to vibrate.

• How did you hear the vibrations of the meter stick? The vibrating gas molecules in the air caused the ear drums in both ears to vibrate.

GET FOCUSED

Instruct students to complete the Focus Questions in their SDRs then discuss them as a class. Use the suggested responses below to guide students’ answers.

• How are sounds produced? Sounds are produced when matter in the form of a solid, liquid or gas vibrates.

• How is sound transferred from one object or substance to another? The vibrations of one object or substance cause pressure waves to impact a neighboring object or substance. These pressure waves cause the second object or substance to start vibrating.

• What is the relationship between the wavelength and frequency of a standing wave and the sound it produces? There is an inverse relationship between wavelength and frequency. A wave with a high frequency has a short wavelength and a wave with a low frequency has a long wavelength.