Tuesday, April 21st, 2009
We were talking about sounds today. We found out about sound waves, and how they travel through the air. We tried making some strange sounds. 
One of our girls showed us how to make strange sounds with a balloon. By pulling the neck of the balloon when the air is escaping, the sound it emits is very funny. Teacher showed us how to make strange sounds with plastic, paper and grass, and we all tried making sounds with straws. We found out that if you cut a straw when you are blowing it, that the note it makes gets higher as the straw is cut.
Next the teacher had a cup with a piece of string coming out. If we pull the string it sounds as if there is a woodpecker in the cup. The noise of the string being pulled is amplified when the string is atttached to the cup.
Last of all we got to use string telephones. They are very easy to make - all you need is string and 2 yoghurt cartons. One end of the string is put through a hole in the carton, and tied. The other end of the string is tied through another carton. If you want to talk through the telephone, you must keep the string tight. Otherwise the sound waves can't travel from one yoghurt pot to the other. We really enjoyed learning about sound today.
One of our girls showed us how to make strange sounds with a balloon. By pulling the neck of the balloon when the air is escaping, the sound it emits is very funny. Teacher showed us how to make strange sounds with plastic, paper and grass, and we all tried making sounds with straws. We found out that if you cut a straw when you are blowing it, that the note it makes gets higher as the straw is cut.
Next the teacher had a cup with a piece of string coming out. If we pull the string it sounds as if there is a woodpecker in the cup. The noise of the string being pulled is amplified when the string is atttached to the cup.
Last of all we got to use string telephones. They are very easy to make - all you need is string and 2 yoghurt cartons. One end of the string is put through a hole in the carton, and tied. The other end of the string is tied through another carton. If you want to talk through the telephone, you must keep the string tight. Otherwise the sound waves can't travel from one yoghurt pot to the other. We really enjoyed learning about sound today.
No comments:
Post a Comment