Science expo

Today was the science expo for our topic study. I was part of the group that was explaining what was on the table. The class had made projects on pulleys and wheels and axles because our topic study was about simple machines.

Mr Hendricks's challenge

For a few days our principal gave us a challenge to predict whether he can lift someone just by his thumb. On Friday Mr Hendricks put his challenge to the test, and brought out a lever and fulcrum to lift one of the children. He positioned the piece of wood, with his thumb steady on one side and a student on the other. To our surprise Mr Hendricks pushed down on the lever with his thumb and suddenly the boy went up. I was amazed at the sight of him “lifting” the boy.

My simple machine

For our topic study we were learning about simple machines. We were told to make a toy using one of the two simple machines, pulley or wheel and axle. I chose to make mine with a pulley.  I had a hard time making a toy so I used YouTube to help me with my ideas. Here are the tools I used:

1. Cardboard
2. Bottle cap
3. Chop stick
4. Water bottle
5. String

Including the pulleys and wheel and axle there are actually six simple machines, which are:

1. Gears
2. Lever
3. Wedge
4. Screw
5. Pulley
6. Wheel and axle