|Physical Science||Transformation of Energy 6C3.00||Process Of Science||Questioning 1.2 a|
CONTENT STANDARD: Physical Science
CONTENT TOPIC: Transformation of Energy
CONCEPT: Sound is produced by vibrating matter and is transmitted in all directions.
CONTENT OBJECTIVE: 6C3.00 To understand the properties of sound and the effect of electricity on sound
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Process Of Science
BENCHMARK: Shared experiences may help to develop an inquisitive mind.
1. Gently stretch the rubber band. Pluck it with one finger. What do you hear? (response) Record your findings. (pause)
2. Place the ruler on the desk so that part hangs over. Hold the ruler on the desk with one hand. Move the free end of the ruler with one hand and then release. What happened? (response) Record your findings. (pause)
3. Blow up the balloon. Let air escape. Observe the neck of the balloon and listen to see if sound is produced. (pause) Record your findings. (pause)
4. Strike a tuning fork and hold it up in the air. Allow it to stop vibrating. (pause) Then, strike it again, this time placing the stem on a solid surface. (pause) Strike the tuning fork a third time, this time placing the stem in a pan of water. (pause) Compare the results. (pause) (The sound would be loudest and of longest duration on the solid surface.)
5. Hook a doorbell to a battery and demonstrate how electricity can be converted to sound energy.
From the activities above we found that sound is produced by vibrating matter. Using these same objects, produce soft sounds. (response) Now, loud sounds. What did you find? (Intensity of sound varies with force used to produce the vibration.) This is called amplitude. Amplitude is the distance a vibrating object moves from its resting position. Using this (Stringed instrument) we can demonstrate sound quality and pitch. If I tighten the strings they vibrate faster so the pitch is higher. If the strings are loosened, the vibrations are slower so the pitch is lower. (demonstrate)
Use the objects to make a loud sound. (response) Now to make a soft sound. (response) Good job!
Write a question about one of these experiments that you would want to investigate.
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