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Creating a Mental Picture

Provide a metaview, lifting students into a wider view of the concept. Use another medium (not reading or writing) to connect students' personal knowing to the concept (i.e. visual arts, music, movement, metaphor, etc.) Involve learners in reflective production that blends the emotional and the cognitive.


Guided Imagery of what a sound wave looks like.

Objective: Students will expense an understanding of wave energy from a concrete example to a more abstract application.

Activity: Guided imagery of what a sound wave looks like. (Use an audio tape of the ocean in the background.) Content for Guided Imagery: "We are going to use guided imagery again to continue our exploration of sound. Please close your eyes and listen. This time we will explore how sounds might look if we could actually see them and how sounds travel. (Pause 15 seconds. Allow students to concentrate on ocean sound.) Pretend that you are at the ocean watching waves travel along the surface of the water. When there is little wind and the water is calm, the waves lap softly to the shore, touch the sand, and recede back into the ocean. With greater force of wind, the waves hit the shore with more vigor. Sound is also believed to travel in waves. It travels through air, water and solid materials in a wave-like motion. Suppose you hear someone call to you from a distance. The voice sounds are traveling to you through the air. Suppose you are swimming under water with a friend. This friend has a small rock in each hand. He hits the rocks together and you can hear this sound, locate your friend and swim toward him. Sound can travel through liquids. Take yourself back in history and you are with a tribe of Plains Indians. You place your ear to the ground and listen for the vibrations of a buffalo herd as it moves swiftly across the plains. A rumbling of the earth lets you know that a herd of buffalo is heading your way. Sounds travel through solid materials. Imagine my voice moving toward you in a series of waves. As I speak, the sounds travel in waves toward you. The sound of my voice is traveling to you through air. (Speak loudly) As I increase the volume of my voice, these waves cover a wider span of space. (Speak softly) As I decrease the volume of my voice, these waves cover a narrower span of space. (Speak in normal volume, high pitch) As I increase the pitch of my voice, these waves vibrate more times per second. (Speak in normal volume, low pitch) As I lower the pitch of my voice, the sound waves vibrate fewer times per second. If I were speaking in a wide open space toward a rock cliff, we might hear an echo (pause--say softer) an echo, an echo of my voice as the sound waves hit the rock cliff and return." (pause for approximately 30 seconds and allow the students to listen to the sound of ocean waves) Materials: Tape recorder, tape of ocean waves.

Assessment: Students keep eyes closed and appear to concentrate on the guided fantasy.

 

Sound Waves

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Subject:

Science

Grade:

Middle School, High School

Concept:

Energy

Bridge:

Motion

Content:

Sound Waves

Viewable by:

Everyone!

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