LAB PRACTICE 1
NAME
VIBRATIONS AND SOUND
RESULTS AND OBSERVATIONS:
INTRODUCTION:
Sound is created when something vibrates and sends
waves of energy (vibration) into our ears. The vibrations
travel through the air or another medium (solid, liquid or
gas) to the ear. The stronger the vibrations, the louder
the sound. Sounds are fainter the further you get from
the sound source.
Sound changes depending on how fast or slow an object
vibrates to make sound waves. Pitch is the quality of a
sound (high or low) and depends on the speed of the
vibrations. Different materials produce different pitches;
if an object vibrates quickly we hear a high-pitched
sound, and if an object vibrates slowly we hear a lowpitched sound. Sounds are usually a mixture of lots of
different kinds of sound waves.
Materials:
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Materials
two paper cups
a sharp pencil
a wool string
Steps:
1.
2.
3.
4.
Cut a wool rope whose length is equal to 20 cm.
Cut a wool rope with a length equal to 12 cm.
Cut a wool rope with a length of 32 cm.
Break the inside of each of the cups with the
pencil.
5. Take the string and put it inside each cup.
6. Tie side and side
CONCLUSIONS:
VOCAB:
LAB PRACTICE 2
NAME
MUSICAL WAVES
INTRODUCTION
What in the world do musical instruments have to do
with physics? Actually, quite a lot!
4. Put the second craft stick on top of the first and
attach them with a thin rubber band on the straw
end.
5. Place the second straw piece between the top of
the wide rubber band and the top craft stick.
(One straw will be under the rubber band, and
one will be on top.)
6. Attach the other end with the last rubber band.
7. Blow in the middle to make a kazoo sound.
RESULTS AND OBSERVATIONS:
The whole reason we can hear music is thanks to
vibrations that form waves of sound which travel through
the air. Our ears collect those waves and translate them
into the music we enjoy.
Musical instruments manipulate the way these waves
are produced or how they travel to produce what we can
sound.
CONCLUSIONS:
The glasses with different amounts of water make
different sounds. We hear sounds because the air around
us vibrates, carrying the sound to our ears. Hitting the
glass causes it to vibrate and make a sound that we can
hear.
PART A
Materials:
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2 wide craft sticks (I bought these at Walmart)
Drinking straw
1 wide rubber band, and 2 thin rubber bands
Scissors
Steps:
1. Cut 2 pieces off the drinking straw, about 1 1/2
inches long.
2. Wrap one of the craft sticks longways with the
wide rubber band.
3. Place one straw piece under the wide rubber
band on one end of the stick.
VOCAB:
LAB PRACTICE 3
NAME
MUSICAL WAVES
PART B
How to Do the Experiment:
Fill several glasses with water, varying the amount of water in each one.
You can add food coloring to change the color in each glass.
Tap the glasses with a spoon to make sounds.
As you tap, listen to how the sounds differ depending on the amount of water in the glass.
RESULTS AND OBSERVATIONS
CONCLUSIONS
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