1. Teacher Name:Mr. David Glaser and Ms. Linda Taylor White

3. School Name:Willard Middle School

4. City or Town:Berkeley

5. State:Calif.

6. Country:U.S.A.

7. Class Name (only needed if you are submitting other forms for other >classes - i.e. 3rd period Science):

Eight different Science classes

9. Number of students who worked on the plan:25-30 students

Several students from 8 different 7th grade classes went through alot of thinking about what materials we need. We had to find what we needed by giving all our ideas about what we did. We had some really great ideas and picked one for each class. We have included a Barometer, Hygrometer, Rain Gauge Minimum Thermometer, Anamometer, and Wind Sock. We also want to learn about cloud formationsdidn't have time to prepare for that. We'll test everything every period.

1. MINIMUM THERMOMETER (see attached picture) We we're trying to come up with a way to measure the coldest part of the night and we came up with our own invention, the Minimum Thermometer! We choose this because it was inexpencive, easy to build. materials: sun print paper plug in light thin sheet of cardboard tape bimetal thermometer appliance timer (borrowed) Tape the cardboard piece with the slit onn the pointer so light only goes through the slit. Set up the appliance timer to turn on the light during the coldest hours of the night. We will test its accurecy by comparing the thermometer with other thermometers.

2. BAROMETER (see attached picture) Easy to build. not expensive. We will test our barometer's accuracy by comparing it to an electronic barometer.

3. HYGROMETER (see attached picture) This was the commonest hygrometer, easy to biuld. 2 thermometers tape wet gauze rubber band fan table, below Measures water in the air. We'll test it by comparing its measurements on the internet from a local science museum local science.

4. RAIN GAUGE (see attached picture) We had all the materials at school and it was easy to build. We are going to test its accurecy is by pouring in a certain volume of water and comparing the measured height to the calulated height.

5. WIND METER materials: bottle of water tape pencil modeling clay short ruler drinking straw thin wooden stick thin cardboard scissors Plan: The wind instrument stands up while the wind blows the rulor to a line on the cardboard which represents a speed of the wind.

6. WIND SOCK materials: 4 ft. long stick w/ hook on the end very fine mesh cone shaped net. If you put the stick in the ground straight up and hand the net on the hook, the wind will blow the net so that it blows out parallel to the ground. As dust and wind blow through the net, it captures the dust, so we can see how much dust is in the air. The sock will also blow straight out against the wind, so we can see which direction the wind is blowing in. > > >

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)? Except for a few items, such as the bimetal thermometer, all of these materials will either be borrowed, or are common things which we already have at school or in our homes. The total cost will certainly be under >\$100.00 >