Sound Unit Big Idea Sound is a form

Sound Unit Big Idea Sound is a form of energy that travels in waves by vibrating molecules.

Sound pollution – what is it? • https: //globalnews. ca/news/3877876/noise-from-torontos-publictransit-could-lead-to-long-term-hearing-loss-study/ • https: //www. soundfighter. com/5 -surprising-facts-about-noisepollution/ • https: //www. youtube. com/watch? v=p 7 Xk. Zleu 9 a. Y

What questions do you have about sound? • Work together as a table. • Write your questions on the poster paper. • I will be collecting your questions as a grade level to see what the 5 th grade is most interested in researching. We will then have a challenge to solve based on our interest.

• How does sound travel to your ears? • Sound travels in particles and vibrates. • Sound travels in air waves. • To much sound coming into your ears. • Sound pollutes the area with loud noises.

I can explain sound as a form of energy.

Energy • Energy is the ability to do work. • You can think of energy as the ability to move something.

Types of Energy Potential Energy Kinetic Energy Light Energy Heat Energy Sound Energy

Sound energy is vibrating molecules • Breaking glass with sound ytube video by Mythbusters.

Sound is a Form of Energy • A table tennis ball hung in front of a speaker (like when you are next to a car with those really big speakers in the trunk and your car vibrates) • Ball will move as the sound waves hit it. Sound waves Table-tennis ball

Sound is energy and sound moves things and sound can cause pollution (remember the video we watched). • After reading your questions about sound and what we now know. We are ready to see what our class challenge will be.

Bring items from home from your recycling bin.

The challenge: How can we prevent the negative effects of sound pollution for this family? We need to gather information about sound to be able to solve the following dilemma : • A family with young children just bought a house near a train track. The train keeps waking up the children. The family wants to know what they can do to make their house more sound proof.

I can explain how pitch changes with how fast an object vibrates. • Slow vibrations produce low pitch. • Using a ruler make a low pitch. Hold ruler 6 inches off the table and strum the ruler. (play a guitar or similar instrument by sweeping the thumb or a plectrum up or down across the strings. ) • Fast vibrations produce high pitch. • Using a ruler make a high pitch. Hold 3 inches off the table and strum the ruler. • Discovery education- Breaking the glass with amplification. Was the sound high pitch or low pitch? (vibrating fast or slow? ) • Make a high pitch sound with your voice while holding your Adam's apple. Now make a low pitch sound. Note the difference in vibrations

Pitch • BBC web site on sound

Activity Two – sound as pitch • Strike a tuning fork on the rubber of your shoe place in water cup- observe waves. • Strike the tuning fork on the table place in water cupobserve the waves. • Which example are slow vibrations – low pitch • Which example are fast vibrations- high pitch Which sounds produce the highest frequency?

Using different size rubber bands make a guitar. Be able to make high and low pitch sounds.

Bell Work • I can describe how sound travels through matter to move from one place to another. • I can explain how sound travels through a solid, liquid or gas at different speeds.

How sound travels • When an object vibrates, sound waves travel from particle to particle. • Sound waves are transmitted by particles in the air. Animation courtesy of Dr. Dan Russell, Kettering University Speaker Air Molecules Ear

Sound travels fastest through?

I can describe how sound travels through different materials. Sound travel through air. 1. Take two blocks and bang them together. 2. Observe the volume of the sound. Sound travel through water. 1. Place a block in the cub of water place your ear next to the cup. Bang the other block on the block in the water. 2. Observe the volume of the sound. Sound travel through a solid. 1. Take a block and bang it on the desk top with your ear on the desk. 2. Observe the volume of the sound.

Sound and Temperature • Colder- slower moving molecules, sound travels slower. • Hotter- faster moving molecules, sound travel faster.

Bell work • I can describe how sound can be absorbed or reflected as an echo.

Sound does not Travel in a Vacuum Click on the graphic above to start the simulation.

Sound Echo – reflecting of a solid surface.

Sound absorbed- watch Brainpop sound

Activity 4 challenge and constraints Problem • A family with young children just bought a house near a train track. The train keeps waking up the children. The family wants to know what they can do to make their house more sound proof. • Task: Design a sound proof room for their children to sleep in. • We will test the room by placing a cell phone with an alarm set in the room, box. The amount of sound heard will be measured in decibels with an online decibels app. • You will work in groups of 4. • Constraints: • The room will be a shoe box or similar size box. • 30 cm of duck tape • Choose 3 different materials that you can find in your recycling bin or around the classroom.

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