© Sandrine New
To study the weather, meteorologists record and analyze data. It is possible to become an amateur meteorologist without spending a fortune on measuring instruments in constructing its own weather station and taking note of his actions.
This series of articles showing how to build some instruments for measuring weather station. While not extremely accurate, of course, these instruments may nevertheless be used to measure weather conditions and to provide time to come.
Most instruments are simple enough to be built with children - sometimes with a little help - for a project to do at home or at school.
This article speaks of instruments used to measure wind direction.
1) Find Wind Direction (Building a Weathervane)
Every station has a weather vane, or indicator of wind direction. The wind vane is pointing in the direction from which the wind.
Model A:
must:
- 2 long wooden skewers or metal
- 1 large straw (drinking)
right - a plastic bottle with a lid
- 1 large pearl
- sand
- cardboard
- Dezs
scissors - plastic tape to cover the books
Instructions:
1. Draw the tail of the arrow of the weathervane on the board - this can be a simple rectangle-. Give them double the size of the arrow over, because it will be folded in half from behind. The cut and fold in half.
2. Place the blunt with a skewer in the tail folded and paste two pieces of cardboard over the tail.
3. Make a hole in the straw near one end. Y insert the skewer with the tail vane, placing its tail vertically.
4. Cut a diamond in the box to the head of the arrow (twice the final size). Make a hole in the middle and insert the skewer - with the tail and straw - through.
5. Fold the diamond in half - it must have looked like a triangle) and glue the two pieces together on the skewer. The head of the arrow should be level. Por
more impervious to the weather vane, the parties may be cardboard covered with plastic adhesive to cover the books.
6. Cut a circle in the cardboard about 10 cm in diameter. Write "N", "E", "S" and "O" on board at regular intervals. Draw a small cross in the center of the circle and split it with scissors. Push the skewer in the second slot of the double cross.
7. Make a hole in the lid of the bottle. Y push the skewer in the circle. Insert the bead on the skewer, above the circle.
8. Insert the second skewer through the straw.
9. Fill the bottle with sand and straw to slide. Screw cap.
10. Guide vane with a compass.
Model B:
must:
- a long wooden stick measuring approximately 1m long (eg. A broomstick)
- an aluminum support for quiche or cake (otherwise, use cardboard and plastic adhesive to cover books)
- a wooden board about 30 cm long (eg a wooden ruler)
-
nails - 1 metal washer
- 1 hammer
- glue
- 1 small saw ( or a serrated knife)
- scissors (cutting from aluminum)
Instructions:
1. With the small saw (or knife) to make a vertical cut - about 1 cm deep - at each end Rule or wooden board.
2. Drive a nail through the middle of the board. The triturate until the board can rotate freely around.
3. Cut a figure into two pieces like an arrow head and a tail (or another figure, as long as the lead element is bigger than the tail) in the aluminum container. Paste an item from each of the notches of the board. Let dry.
the absence of aluminum, it is possible to use cardboard to protect from the elements by covering it with plastic tape.
4. Place the metal washer on a stick and plant a nail through the hole in the vane - through the washer - and the stick. The vane must rotate freely and easily around the nail.
(between the vane and the stick, it is possible to add a cross made of two pieces of wood dishes pointing in the direction of the four cardinal points. The proper orientation using a compass).
5. Place the vane on the outside, for example by holding onto a fence with wire. Place it as high above the fence as possible, while the hanging securely.
Explanation:
head - or larger element - from the vane tip always in the direction from which the wind blows. For example, if the weather vane indicates the South, then the wind comes from the South - and do not breath to the south, as is often believed-. The head
- Gold Of The Biggest element-pointing Will Always To The Point
2) Find the Wind Direction (Build banners)
Instead of a weathervane, banners can be used to find the direction of wind.
must:
- 1 paper plate
- 1
permanent marker - scissors
-
crepe paper - pencils
- tape
Instructions:
1. Draw a large cross through the center of the plate, on its reverse.
2. Cut a square with sides of 2.5 cm to 1.5 cm from the edge at each end of the cross.
3. Cut out 8 streamers of crepe paper measuring 1 meter long each.
4. Braid the two by two banners, and hang the end of one of four pairs in each of the holes in the plate.
5. Write "N", "E", "S", "O" around each hole.
6. Keep your banners before you, the plate parallel to the ground with the thumb on top, near the letter "S", and the outstretched arm.
7. Use a compass to point "N" of the plate in the direction of North.
Explanation:
The direction in which the crepe paper flies indicates wind direction: if the banners are flying westward, while the wind from the east.
3) Find the cardinal points (Build your own Compass)
To know where the wind comes at a time, it is nécessiare have a compass. Instead of buying one, it is easy to manufacture his own.
must:
- a straight stick measuring about 45 cm
- 4 stones (pebbles)
heavy - some smaller stones
- a flat spot in the sun
- 1 string
1. Dig a hole 15 cm in the soil and bury the bottom of the stick.
2. In the morning, place a small stone at the end of the shadow of the stick. Hang a piece of string to the stick and use the string to draw a circle on the ground whose radius is the distance between the stick and the small stone marker.
3. In the afternoon, when the shadow has the same length as the morning - or when it touches the circle on the ground - but a different direction, placing a new small stone marker.
Shadow of the morning and the afternoon meet at the place where the stick is planted to form an arrow pointing south (or north in the southern hemisphere).
4. Place a two 4 large stones on the ground about 30 cm of the stick in the direction where the South has been found. The North is in the opposite direction, aligned with the Southern rock and stick. East and West, located midway between North and South, are opposed.
Sources:
http://www.fi.edu/weather/todo/todo.html
M ake Y o O wn W eather S tation
http://www.miamisci.org/hurricane/weathertools .
Weather html tools
http://www.meteorologic.net/construire-sa-station-meteo.php
http://ecolecentreferte.free.fr/projet-meteo/Le-projet-meteo.htm
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