How is air pollution affected by weather? Some types of pollution are worse in the summer heat, while others are worse in cold winter weather.

An experiment that demonstrates why there are clouds in the sky. Start with air, invisible water vapor, particles we call condensation nuclei, and air pressure...the cloud comes later!

A tutorial that describes the five factors that determine the weather in a particular place and time. The factors discussed in this tutorial are air temperature, air pressure, humidity, wind, and precipitation. A PDF file of the tutorial...

Discusses research done in the American Midwest showing that farming practices that increase humidity levels possibly could have an impact on the weather, causing a reduction in the average temperature and an increase in the amount of...

For this activity, students use models to observe that air is a fluid that flows due to temperature-driven density differences.

Describes what dew point is and how it relates to moisture content of the air. Also explains condensation and relative humidity.

Use this site to learn about basic gas properties including motion, viscosity, and compressibility. Includes links to activities for all ages.

An introduction to the factors that affect the Arctic's weather and climate: latitude, land/sea distribution, solar radiation, air temperature, air pressure, winds, humidity, clouds, and precipitation.

The operation of conventional air conditioners are described. Their parts and the refrigerant/heat exchange cycle is discussed. The use of alternative geothermal systems are explained.

In this activity, learners will have an opportunity to solve a mystery. They will discover why a soda can collapses during a demonstration due to the effects of changes in temperature and atmospheric pressure. Students will gain further...

Students are guided in how to build their own weather station that will measure temperature, humidity, precipitation, atmospheric pressure, and wind direction and speed.

In this lesson, students will understand that temperature changes can cause density changes in water and in air.

The Io moth, named for a character in Greek mythology, has a very obvious black eyespot on each hindwing. Males are golden yellow in color, but females are more brown. It has a wingspan of 2.5-3.5 inches. In Canada and northern states,...

Seven lives were lost as communications failed in the face of public pressure to proceed with the launch despite dangerously cold conditions. January 28, 1986, The sun had been up for less than an hour and air temperatures were a few...

If you've ever so much as watched a news clip about a hurricane, you probably know that hurricanes draw their power from warm ocean waters. If that is true, does it mean that hurricanes actually cool the ocean down when they pass...

In this demonstration, students observe how temperature changes can create a weather front, in particular how the mixing of warm and cold air can produce thunderstorms.

The temperature of the sea, moisture in the air, and high winds all play a role in making a hurricane stronger or weaker. Drag the hurricane over the ocean to see what happens.

Explore with Julia how wind speed and temperature affect evaporation rate.

Learners are introduced to the basics of the Earth's weather. Concepts include fundamental causes of common weather phenomena such as temperature changes, wind, clouds, rain and snow. The different factors that affect the weather and the...

This resource discusses the causes and effects of global warming.

In this activity, you will use a temperature sensor to relate changes in sunlight to the temperature of the air trapped in a container.