The Aneroid Barometer
- Explains what this instrument is, who invented it, and how it works. Includes a guide to reading, adjusting, and using the barometer.
- http://www.bom.gov.au/info/aneroid/aneroid.shtml

Homemade Easter Egg Anemometer
- Describes in words and pictures how they build an anemometer.
- http://www.otherpower.com/anemometer.html

Rain Gauge
- Contains several activities to see how rain gauges work.
- http://www.colby.edu/cpse/equipment2/Weather/gauge.html

How does a Barometer work?
- Explains what a barometer is, and how it works.
- http://136067.brightwebsite.com/how-does-a-barometer-work/

USAToday.com: How a Barometer Measures Air Pressure
- Drawing and description of a barometer.
- http://www.usatoday.com/weather/wbaromtr.htm

Kids Health: How Does A Thermometer Work?
- Easy to understand description of what makes a thermometer work.
- http://www.kidsnewsroom.org/testmember/070700/health_070700.htm

Primary Exploration
- An experiment to demonstrate how a thermometer works.
- http://www.eia.doe.gov/kids/classactivities/ThermometerPrimaryActivitySept2002.pdf

How Does the Thermometer Work?
- Answers the question of how thermometers can tell us the temperature.
- http://www.energyquest.ca.gov/how_it_works/thermometer.html

Weather Instruments
- Short encyclopedia entries for several different weather instruments.
- http://cybersleuth-kids.com/sleuth/Weather/Weather_Instruments/