An explanation of air pressure and how it relates to weather is highlighted on this National Aeronautics and Space Administration (NASA) kids page. The site offers experiments, discussion questions, a word search game, and interactive computer animations that explain the relationship between weather and air pressure.

Resource Type: Instructional Material - Experiment/Lab Activity, Instructional Material - Student Guide, Audio/Visual - Illustration
Grade Level: 3, 4, 5, 6

The aneroid barometer and how to use it

http://www.bom.gov.au/info/aneroid/aneroid.shtml

This article defines barometer, gives its history, describes how the aneroid barometer works, and is enhanced with photos and illustrations.

Resource Type: Reference Material - Article, Audio/Visual - Illustration, Audio/Visual - Photograph
Grade Level: 4, 5, 6

Observe an animation of land and sea breezes

http://www.classzone.com/books/earth_science/terc/content/visualizations/es1903/es190...

Learners can view the animation, identify the key components in this system, and explain how each one contributes to the formation of a breeze. Although the resource was designed to accompany a specific Earth science textbook, it can be used without that text.

Resource Type: Audio/Visual - Movie/Animation
Grade Level: 3, 4, 5, 6

The Online Tornado FAQ

http://www.spc.noaa.gov/faq/tornado/index.html

This site provides answers to frequently asked questions about tornadoes. The questions are grouped into the following categories: the basics about tornadoes, tornado forecasting, tornado damage, tornado safety, historical tornadoes, tornado climatology, spotting and chasing, tornado research, and scientific references. Information on related concepts is linked within each section and can also be accessed via a clickable index of terms.

Resource Type: Reference Material - FAQ
Grade Level: 2, 3, 4, 5, 6

Oceans, climate and weather

http://msteacher.org/epubs/science/science6/science.aspx

What is the difference between weather and climate? What do the oceans have to do with them? Weather is the day-to-day state of the atmosphere and its short-term (minutes to weeks) variation. Climate is typically described by the regional patterns of seasonal temperature and precipitation over 30 years. The averages of annual temperature, rainfall, cloud cover, and depth of frost penetration are all typical climate-related statistics. The oceans influence the worlds climate by storing solar energy and distributing it around the planet through currents and atmospheric winds.This publication is all about developing your students understandings of earths oceans and the major effect they have on climate. Understanding and interpreting local weather data and understanding the relationship between weather and climate are important first steps to understanding larger-scale global climate changes. Activities that ask students to collect and analyze local weather data as well as analyze global data can be found in the Lessons and Activities section. Analyzing and interpreting data is a major focus of this publication. Numerous data sets can be found in the Sources for Real Data section. The Background Information section and the article Tomorrows Forecast will help reinforce your own content knowledge.

Resource Type: Instructional Material - Instructor Guide/Manual
Grade Level: 4, 5, 6