"Exploring the Pitch Changes of the Ruler" Sound PPT Courseware

Description

"Exploring the Pitch Changes of the Ruler" Sound PPT Courseware

Knowledge review:

(1) Sound is produced by _________ objects.

(2) The intensity of sound can be described by __________.

(3) The pitch of the sound can be described by _________.

(4) The difference in the _______, ________, and ________ of the object will change the level of the sound emitted by the object.

think about it

1. Does the ruler make any sound?

2. If so, where does its sound come from?

3. Will its sound change?

Design experimental plan

Question to explore: Will the pitch change if the ruler is extended longer or shorter?

My guess: the shorter the ruler sticks out, the higher the pitch.

Material: ruler

Experimental process: First extend the ruler 8cm, move the ruler, extend the ruler 16cm, extend the ruler 24cm, extend the ruler 32cm, use the same force to move the ruler, and observe carefully.

Experimental phenomenon: The shorter the ruler extends, the higher the sound it makes when vibrating

Experimental conclusion: The shorter the ruler extends, the faster it vibrates and the higher the pitch.

Experimental requirements

1. Press the ruler tightly and do not let the ruler make any sound when it hits the table.

2. Be sure to keep quiet.

3. Conduct the experiment at once in the order in which the length of the ruler extending out of the tabletop changes: In order to facilitate comparison and make the experimental phenomenon more obvious, we determined that the lengths of the ruler extending out are 8, 16, 24, and 32cm respectively.

4. Press the ruler with the same force, and do the experiment of the same length several times.

5. Compare on the basis of repeated experiments, and finally complete the experiment record sheet.

6. Pay attention to division of labor and cooperation.

Knowledge review:

1. The intensity and height of the object’s sound are described by ( ) and ( ) respectively.

2. We know that differences in the length, thickness, and tightness of an object will cause changes in the sound produced by the object.

3. The length of the ruler extending outside the table will cause changes in ( ). The longer the ruler ( ), the shorter ( ).

4. Hitting the drum head hard will make the sound the drum head makes ( )

A increase B decrease C increase

5. The sounds produced by plastic rulers, steel rulers and wooden rulers are different, among which the sound produced by steel rulers ( )

A low and dull B high and bright C small and light

6. Two rulers extending 20 cm and 10 cm out of the tabletop will make loud sounds ( ) when they vibrate.

A 10 cm ruler B 20 cm ruler C Same height

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"Exploring the Pitch Changes of the Ruler" Sound PPT Download:

"Exploring the Pitch Changes of the Ruler" Sound PPT Download Part One: Introduction of the New Lesson Do students usually like to play with toys? Today we are also going to play with toys. We are not only competing to see who can play well, but also competing to see who has gained more knowledge while playing. ..

"Exploring the Pitch Changes of the Ruler" Sound PPT:

"Exploring the Pitch Changes of the Ruler" Sound PPT Part One: Knowledge Review 1. Sound is produced by the object _____. 2. The strength of the sound can be described by _____. 3. The pitch of the sound can be described by _____. 4. Objects _____, _____, __..

"Exploring the Pitch Changes of the Ruler" Sound PPT Courseware 2:

"Exploring the Pitch Changes of the Ruler" Sound PPT Courseware 2 Question to explore: Will the short pitch change if the ruler is extended further? My guess: the shorter the ruler extends, the higher the pitch. Material: ruler. Experimental process: first extend the ruler 8cm and move the ruler...

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Update Time: 2024-10-01

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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