A look at the weather, how it is measured, and how it is caused. Learn what weather is like all over the world, how global warming is affecting our planet, and how "extreme" conditions like hurricanes, tornadoes, floods, and drought...

Animated resource helps young researchers understand air pressure and how we measure it.

Find out about wind and jet streams and the tools that measure them.

Use this site to learn all about the instruments that are used to measure things related to weather.

Provides information on a variety of weather station types.

Kids learn about wind including how it is formed, how it is measured, local and global winds including prevailing, westerlies, trade, and polar easterlies.

This video segment adapted from NOVA explains the difference between weather and climate and features groundbreaking analysis revealing that Earth's climate has changed much faster than previously believed. [5:48]

What is wind? How is it caused? This site offers simple answers to many common questions about wind as well as a chart of the Beaufort scale, which "is an empirical measure for the intensity of the weather based mainly on wind power."

Take a look at how temperature is measured and what factors affect the air temperature.

Explains how dew point is used to show the amount of moisture in the air. Gives an activity for measuring the dew point at home.

"Imagine a baseball dropped from an airplane flying at 30,000 feet; imagine that baseball reaching speeds of 120 MPH as it falls to the ground; and imagine you're under it!" How does hail form? How big can it get? Read more here about...

A thorough explanation of acid rain with a focus on the following topics: what is acid rain, the pH scale measures acidity, what does acid rain do, and what can I do about acid rain.

Over 100 handouts with answer sheets you can print and use to help build English vocabulary. Numerous topics and themes are covered: everyday words, math terms, seasonal and holiday words, geographical terms, animals, opposites, parts of...

An all purpose site with something for everyone. Learn about global warming and climate change, ask a scientist, take a quiz, or get a lesson plan!