"Weather Worlds"

Mike Reynolds

Cranbrook Kingswood M.S.. 48303

5th hour Science

The Fifth hour Science class has come up with the following proposal for measuring weather. We are going to measure the weather using these procedures. We will measure air temperature, and barometric pressure. We will also measure humidity, rain fall, wind speed and direction.

To measure air temperature, we will use your ordinary thermometer. We will measure the temperature in various places. In the shade, in the sun, on the ground, and 20 meters in the air. Then we will find the average of all of the temperatures. This will be done using balloons that we will buy and ends of brooms that will be borrowed, which will be used for anchor. The string will be attached to the anchors (brooms) which will be laying on the ground. The balloon will be suspended in the air, atttached to the string. Then, taped to the balloon will be the thermometers. This will result in a primitive weather balloon.

For barometric pressure, we will use a barometer. This will tell us the pressure in the air.

To measure the humidity, we will use psycrometer. This will tell us the humidity at the time of the measurement.

To measure rain fall, we will use a tube with marks at every centimeter. This will catch the rain and give us an average of the rain fall over a certain period of time.

To measure wind speed and direction we will use a ananometer. This is a windmill sort of thing. This will spin as the wind blows, and tell us the wind speed and direction. Those are the instruments and procedures we will use to measure the weather. We will take each measurement with care, and note it on a chart. It should be noted that the cost of things is under \$100 (100 dollars) if the brooms loaned to us. The ananometer can be bought at a local appliance store or at a place like Radio Shack. The Instructions one how to build all of these tools is written down below: Materials shoe box, two thread spool, about 14 inches (36 cm) of dowel to fit in the reels, balloon, 20 yards of string, compass, no. 1 pencil, paper, glue, triangle of strong card board, cellophane tape. Put a length of dowel through two thread spools (with no thread) so that it spins easily. Glue one reel onto the base of a shoe box. Put the other dowel on the lid directly above the first, with a hole in the lid for the dowel. Tape a piece of paper onto the lid so it can be the recording chart. Make a wind vane from a triangle of cardboard, and attach a soft lead pencil to its upright edge. Tape the middle of the vane to the dowel, so that when it spins, the pencil draws a line on the recording chart. Then place the wind recorder in an exposed place, and put stones in the shoe box to anchor it. Draw a north-south line on the shoe box. Draw a north -south line on the chart. The thickest part of the line shows where the wind has been blowing from for most of the time

11. How do you know that the cost of the materials to build all of your instruments will be under \$100.00 (maximum words: 200)? I know this because I, the director and the Fifth Hour Science class have kept close tabs on how much money we spend on this project. If one of my class mates spends money on this project, they must record all of the money they spend, and give it to me. I then record it and give them (the class) the total of how much money we have left to spend. Price List: Anometer: \$31.35 Thermometer: \$1.20 each psychrometer: \$21.50 Graduated Cylinder: 15.85