Balloon Hovercraft

How does a hovercraft hover?

I predict that The Hovercraft about three cm above the table, because the air that you breath in it will make it hover.

• CD
• Bottle Lid
• Balloon

Step 1: Glue the bottle cap over the CD hole. Step 2: Blow up the balloon. When it is fully inflated twist the end so no air comes out. Step 3: Stretch the balloon over the end of the bottle cap. Step 4: Open up the and place the CD on the surface Step 5: Untwist balloon and and let go.

The air from the balloon comes out of the open bottom of the bottle cap so the air coming out make the Hovercraft hover and move with the air.

The air from the balloon creates a cushion of moving air between the disc and the CD and reduce the friction across the surface.

Bridge Building

We have been learning about forces and how they help shape the sort of bridges that we build.

We learned that there are three main types of bridge design; beam, truss and suspension.  Using this knowledge we designed and built our own bridges.

Miss Fletcher set the challenge that our bridges had to be 30 cm long and strong enough to hold an object.

In my group there were Kaye-Lani, Frank and Stella.  We used an Egg Carton and some card board to build our bridge.

Here is a photo of our beam bridge.  What I like best about our bridge is that it can hold a lot of weight on it's deck.

Volume and Capacity

This week we used popcorn to learn about volume and capacity.

Speeches

For the last two weeks we have been working on writing speeches.
My topic was about  playing more sports.
We had to present them in front of our class.
I think I need to work on my expression.
Here is my speech.