CLUE SIER
a pencil with rubber eraser
Procedures:
1.
each end. Make each slit about lcm(or 12 inch ) long.
2.
4.
Cut a slit in each end of a drinking straw. Get a straight barbeque stick and use scissors to cut a slit on
Cut cardboard into a triangle and a square. Make the triangle a wide "arrow shape (isosceles, and
keep it smaller than the square. Make the arrow about 5cm(zinch) long and the square about 7cm
(2.75inch) on each side.
3. Stick the paper triangle and square into the slots on the straw. Put the triangle on one end, so it makes
a point like an arrow. Put the square into the other slot.
Fill a container with small rocks. Take a plastic drinking cup or plastic container with a lid/cover. Fill this
about half-way full of pebbles, sand and other heavy objects that will keep the wind vane from slipping.
Put on the lid/cover tightly. Mark N, E, W. S on the side of the plastic cup as shown in the picture.
5. Stick a pencil through the bottom of the container. Pick a pencil with a rubber (an eraser) at one end.
Turn the plastic container upside down and make a hole through the bottom. Stick the pencil through
this hole, writing side down, and into the pebbles or sand to keep it from slipping.
6. Stick a pin through the straw into the pencil rubber( the eraser). Stick it through the center of the drinking
straw, then into the pencil rubber(the eraser).
7. Now that you have an improvised wind vane, observe the arrow as the wind blows.what is the image look like ​