Middle school students should be ready to collect, organize, and and display data. Weather projects offer good data for charts and tables and address many key science concepts.
The Purpose of the Science Project
Few people understand how relative humidity is determined, but the process is very simple. Evaporation occurs slowly when air is already damp and rapidly in dry air. Since evaporation cools a thermometer, the amount of cooling on wet thermometer bulb will be less when the air is wet and more when the air is dry. A comparison of the two temperatures using a wet-bulb, dry-bulb table gives the relative humidity.
Materials for Science Project
The student will need:
- 1 thermometer — either a pocket type or a glass type like those in science labs
- small amount of Kleenex or toilet paper
- three-panel poster
- three or four feet of fishing line or strong string
- a small container with a few ounces of water
Science Fair Project Procedure
The thermometer readings should be taken three times on the same day — morning, once from 7:00 AM to 8:00AM; once at midday from noon till 1:00 PM; once after sunset about 7:00 PM till 8:00 PM. The poster will take another hour or more depending on how much time is given to neatness and organization.
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