Question

What is an anaemometer and a wind vane ?

How to make them ?

Answer 1

Anemometers measure wind speed
wind vanes measure wind direction
Procedure-anaemometer

1. Use the hole punch to make a hole in the side of each of the 4 paper cups.
2. Use the hole punch to make 4 holes spaced evenly around the rim of the last cup. This will be the center of the anemometer.
3. Slide 2 of the wooden dowels through the holes in the center cup. They should cross in an “X.”
4. Insert the ends of the dowels into the holes of the other cups and tape them into place. Make sure the cups are all facing the same direction.
5. Take the last wooden dowel and make a hole in the bottom of the center cup.
6. Push the dowel up until it meets the X and tape everything together. This will be your rotation axis.
7. Put the center dowel into an empty water bottle and begin testing!

Procedure-wind vane

1. Cut a slit in each end of a drinking straw.
2. Cut thick paper into a triangle and a square.
3. Stick the paper triangle and square into the slots on the straw.
4. Fill a container with small rocks.
5. Make a lid for the container.
6. Stick a pencil through the bottom of the container.
7. Stick a pin through the straw into the eraser.
8. Use a compass to mark the directions on your wind vane (optional).
9. Watch the wind vane spin.