FLOATING BALL

You will need:
A straw
A ping-pong ball, or small styrofoam ball from a craft store

Procedure:
Take the straw, hold it in your mouth, and point it straight up.
Blow pretty hard through the straw to make a good air stream.
Set the ball gently in the air stream. The ball should float in the stream!
Make sure you do not chase the ball, and just let it float in the steady stream.
It takes practice, but it won’t go anywhere if you keep it pointed up in one place!

CONDENSATION

You will need:
Glass of water 

Procedure:

1. Put the glass of water in the refrigerator for about an hour or so, until it is very cold. 
2. Take it out of the refrigerator after it is cold, and notice how drops of water form on the outside of the glass.

Explanatory Note
The glass filled with cold water cools the air around it when you take it out of the refrigerator, and some of the water vapor in the air condenses and forms drops of water on the outside of the glass

MAGNETIC PICK UP

You will need:


A piece of paper
A paper clip
Thread
Clear tape
Scissors
A strong magnet

Procedure

1. Cut a paper kite shape about three inches long and attach a paper clip to one corner.
2. To the opposite corner, tape a piece of thread about eight inches long.
3. Tape the other end of the thread to a flat surface.
4. Use a strong magnet to pick up the paper clip and extend the string to full length.
5. Hold the kite between your fingers and slowly move the magnet away from the paper       clip. 
6. When you release the kite, it “flies,” unattached to the magnet.


Explanatory Note:
Magnets have a magnetic field, an invisible force that attracts some kinds of metal. Metal objects within the magnetic field do not have to touch a magnet to be pulled by magnetism.

Resources:
http://kids.nationalgeographic.com/kids/activities/funscience/magnet/

BALLOON ROCKET

BALLOON ROCKET

Key idea: 
To every force there is an equal and opposite reaction force.

You will need:
• a length of fishing line or waxy string
• a means to attach the line or string to walls
• sticky tape
• a plastic soft-drink bottle
• plasticine
• Blu-Tack
• drinking straws
• long balloons
• paperclips.

Procedure:

1. String a fishing line across the room with a straw attached so it can slide along the line.
2. Use sticky tape to attach a balloon to the straw. Blow up the balloon and release it, pointing the balloon so it is propelled along the fishing line.

Explanatory note: 
The balloon rocket works on the principle of rocket
propulsion. This is what is meant by ‘to every action there is an equal and
opposite reaction’. The balloon forces air out as it deflates, and itself
experiences a force from the air in the opposite direction.

Resources:
Hubber, P. & Tytler, R (2005). Ideas for Teaching Science: Years: P-8. Burwood: Deakin University