Larynx Laughs! You can feel your throat vibrating!
Hang in there!
Experiment: To investigate whether sound travels better through a solid or a gas.
Materials:
You will need-
Two 30 cm pieces of thread.
One metal clothes hanger.
A piece of paper and a pen to record your results.
Method:
What you have to do-
1) Tie one piece of thread to each end of the hanger.
2) Hold the hanger upside down by the ends of the pieces of string.
3) Bang the hanger against a table.
4) Listen to how loud the sound is!
5) Now repeat steps one and two but this time put your fingers in your ears while holding the strings.
6) Bang the hanger against a table.
7) Listen to how loud the sound is!
Results:
Did you discover what we did?
When your fingers are in your ears the sound is much louder.
Conclusions:
Sound travels better through a solid (string), than through a gas (air).
Then we learned about hypothesis= what it is "supposed to do". The scientific method requires that one can test it and we did...
We also learned a very important lesson; that sometimes we are wrong and that is ok-no, it is good because that is when learning begins!
Tick Tock!
Experiment: To investigate through which solid, sound travels best.
Materials:
You will need-
One friend.
A watch – not digital!
Different types of solids about the same thickness e.g. wood, glass, concrete, plastic, paper.
A piece of paper and a pen to record your results.
Method:
What you have to do-
1) Partner 1 and 2 should stand either side of the solid e.g. a glass window.
2) Partner 1 should hold the ticking watch against the solid.
3)Partner 2 should then press their ear against the solid on the other side and listen to the intensity of the sound of the 'tick tock' from the clock.
4)Repeat these steps using different solids and then record through which solid the 'tick tock' sound was loudest. In other words which solid let the 'tick tock' sound travel through best.
Bright ideas!
Make up a scale (1-4) of sound intensities, to help you record your results!
1. Very soft.
2. Soft.
3. Loud.
4. Very Loud.
Then record your results
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Larynx Laughs!
experiments
