Sound experiment

Hello!

Today I’m going to share with you 2 science experiments that I’ve learned about.

Materials for the 2 experiments:

  • turning fork
  • plastic cup
  • plastic wrap
  • strings
  • sugar

Hypothesis:

I think that the vibration makes a sound.

Conclusion:

The vibration makes a sound when you hit the sugar. I hit my desk with the tuning fork and then put it on top of the sugar and the cup moved.

2nd experiment:

Hypotheses:

I did not know what to expect at all.

conclusion:

When I hit the tuning fork on my desk and put it in the water splatted on my face. When I hit the tuning fork on my desk then put it on the cup moved.

 

Pulley

Howdy! My name is talb1 and today I am going to talk about pulleys.

A pulley is a system that is made out of this material called steel. You need to use steel because if you want to pull something really heavy you NEED to use steel. A pulley is a pretty basic machine. It works like this, You tie the thing that you want to pull to the end of the steel. Then you go to the other side of the machine and pull it at the end of the steel then it goes up!