A partial listing of the teacher
activities is contained here.
Coin in the cup
- Material: Index card, coin, drinking glass
- Place the card over the top of the glass. Put the coin on the
card so that it lies over the opening of the glass. How can you
get the coin into the glass without touching the coin or tilting
the card? Why does this work? Does it matter how fast you do it?
Strong pull, weak pull
- Material: Book, strong string, thread
- Tie the strong string around the book. Cut two pieces of
thread. Tie one piece to the string on the front cover side of the
book. Tie the other piece to the string on the back cover side of
the book. Pick up the book by holding one of the pieces of thread.
The book should hang from the thread and the second piece of
thread should be hanging beneath the book. Hold the second piece
of string too. Which string will break if you pull strongly and
very quickly? Which one will break if you pull slowly? Try it.
What happens? Why?
Antigravity pail (Do this
one outside, if possible.)
- Material: Tin can, string, nail, water
- Punch two holes at the top of the can, one on either side. Tie
the string through the holes. Put a few centimeters of water at
the bottom of the can. Swing the can in a vertical loop. What
happens? How fast do you have to swing the can to keep the water
- Material: Piece of paper, objects from the kit
- Place the piece of paper on a smooth surface. Place some
objects on top of it. How can you get the paper out from under the
objects without moving the objects? Try with objects of different
weights. Is it easier to do if the objects are heavier?
Push It Around
- Material: Foil-wrapped weighted cups
- Start with the two equally weighted cups. Put the wide end
down on the table. Give the two cups an equal push. What do you
observe about the motions of the cups? Now try giving the cups
unequal pushes. What is the motion now? Why are they different?
- Now use two cups with different masses. First try the equal
push then the unequal push. What can you generalize about force
(push or pull), mass and acceleration (change in speed)?
- Material: Funnel, ping pong ball
- Place the ping pong ball in the funnel. Try as hard as you can
to blow the ball out of the funnel. Try pointing the funnel in
different directions. What is happening?
- Material: Drinking straw, glass of water, scissors
- Cut the straw almost all the way through, about 2/3 of the way
from one end. Place the long end of the straw in the glass of
water. Bend the straw 90 degrees at the break. Blow through the
other end. How does it work?
Test your strength
- Material: Large sheet of paper(newspaper size), ruler
- Spread the paper out on a table top. Put the ruler under one
part of the paper so that the free end of the ruler sticks out
from the table. Push down quickly on the ruler and try to lift the
paper. Why is it so hard to lift? Can you think of a way to lift
the paper easily?