Wednesday November 4, 2015 Science

Warm Up.. Bring your notebook, pencil, agenda to your desk Complete Wednesday’s warm up now – do not work ahead YOU ARE QUIET, WORKING WHEN THE BELL RINGS

Today’s Agenda… Track our test on Visible Light 6.P.1.2 (except for 4 th block) Review Vocabulary Foldable for Sound Study Jams video and questions Sound Lab – Tuning Forks!

Tracking our Test – except for 4 th block You will receive your tracking sheet now Next you will receive your pre test results Please record your score in the box 6.P.1.2 pre test Next you will receive your post results Please record your score in the box 6.P.1.2 post test Did you achieve mastery – write yes or no Now pass everything back in to me

Vocabulary Foldable Today we will review our foldable from yesterday!

Vocabulary – Sound Energy caused by vibrations (movement up or down or back and forth)

Vocabulary – Sound Waves Sound travels in Longitudinal waves (also known as compressional waves)

Comparing Amplitude and Sound Which wave is louder, why?

Vocabulary - Amplitude The loudness or softness of a sound ( the intensity of sound) Large amplitude creates loud sounds Small amplitude creates soft sounds

Who has been to a concert? What does an amplifier do to the music at a concert? When it is combined with a loudspeaker it can amplify electric guitars and other musical instruments. Makes the concert more intense!

Table of Sound Frequencies

Vocabulary - Frequency The number of sound waves that pass a point in 1 second Humans hear frequencies ranging 20 – 20,000 hertz

Frequency Dogs hear frequencies up to 45,000 hertz (That is why we cannot hear a dog whistle)

Vocabulary - Decibels The measurement of sound Sounds over 120 decibels = dangerous Long exposure to loud sounds will cause permanent hearing damage that cannot be repaired

Common Sounds in Decibels Link /information-center/decibel-exposure-time- guidelines/ /information-center/decibel-exposure-time- guidelines/

Pitch is due to frequency!

Vocabulary - Pitch The highness or lowness of a sound Determined by frequency (how fast something vibrates) Low frequency = low pitch (tubas) High frequency = high pitch (flutes)

Pitch and Sound – If an object vibrates quickly = it will produce a high-pitched sound ( has high-frequencies and short wavelengths) Flutes have a high pitch (due to high frequency)

Pitch and Sound – If an object vibrates slowly = it will produce a low-pitched sound ( has low frequencies and long wavelengths) Tubas have a low pitch (due to low frequency)

Do we remember this? Sound can only move through a medium Sound cannot travel in outer space (vacuum) Solid liquid gas fastest in solids slowest in gases

Examples: Sound in different mediums MediumSpeed Air 740 miles per hour Water 3,324 miles per hour Steel 7,435 miles per hour

Let’s think about this…. Question – How is sound created? Question – Why are sounds different? Question – How do we hear sounds?

Study Jams…Sound In a moment you will watch a video on sound. Before, write these questions in your notebook leaving 2 lines between each question 1. What causes sound? 2. How does sound travel? 3. What is the frequency of sound? 4. What is a sound’s pitch? 5. What is a sound’s volume and how is it measured?

Study Jams…Sound Remember you are listening to the video to find out the answers to your questions… ms/science/energy-light-sound/sound.htm ms/science/energy-light-sound/sound.htm

Sound Lab – Tuning Forks You will count off from 1 – 4 to form lab groups You will be investigating sound today using tuning forks You will record all information into your interactive notebook We will review the lab procedure together now

6DVY 6DVY Preview of more of what we will discover on sound!

C8 C8 Bill Nye Sound

ywIg ywIg Sound Vibrations Experiments