Eco express
CONNECTING KIDS TO THE NATURAL WORLD.
TIED TO STANDARDS. LOCAL. RELEVANT. REAL.
how does it work
The core of EcoExpress lies in real world stories about everyday people who are taking on environmental challenges by getting involved. Engaging, inspiring, and anchored in PA's Environment and Ecology standards to bring Classroom Subjects to life. Learn More >>
Most Watched Videos
Welcome to EcoExpress!
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Thank you for visiting EcoExpress.org!
Anyone can watch our streaming, environmental documentary videos online!
But to gain access to the lesson plan content associated with each video that is aligned to the Pennsylvania State Academic Standards for Environment and Ecology and the School District of Philadelphia's Planning and Scheduling Timelines, you must have an EcoExpress.org account.
Register for your FREE EcoExpress.org account here!
Upcoming Event:
EcoExpress' Science Café
Saturday, April 21st, 2012 at 3:30pm,
at Sister Cities Park (18th St and Race Street in Philadelphia, PA)
During the Philadelphia Science Festival Carnival on the Parkway, EcoExpress will be presenting a FREE Science Café designed specifically for local teachers!
Connect the Philadelphia Science Festival experience with the classroom while expanding your science and environ mental resources by attending EcoExpress’ Science Café. You will receive information about free classroom resources and great tips from leading educational experts. You will also have the chance to share your own ideas, suggestions, and successes with other local educators during our breakout discussion session.See the full list of panelists and RSVP for the event here!
Do you need help troubleshooting with registration, searching for content, or remembering your login information? Please contact us at info@ecoexpress.org with any questions, issues, or comments.
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Featured Community Partners
Science is My Specialty Presents: Anita Brook Dupree
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EcoExpress has recently teamed up with Anita Brook Dupree, one of the region’s leading experts on science education and owner of Science is My Specialty Educational Consulting. Anita’s Corner will appear on an occasional basis on our website and contain information on science topics and science happenings in the Philadelphia area. More information about Science Is My Specialty Consulting can be found at: www.scienceismyspecialty.com or on Facebook.
Why Do We Have Seasons?
One of the most misunderstood concepts in science is the answer the to question: Why do we have seasons? Many people, even very educated people, have strange misconceptions about this natural phenomenon. In the late 1980's a documentary called "A Private Universe" was made about student misconceptions in science.Click here to see a short preview of the video A Private Universe and then read on to learn the real reason we have seasons.
We have seasonal weather changes because of three reasons (and none of them are because the Earth is closer to the sun).

The three reasons why we have Seasons are:
- The Earth's axis is tilted at an angle of 23.5 degrees. This means that the Earth is always "pointing" to one side as it goes around the Sun. So, sometimes the Sun is in the direction that the Earth is pointing, but not at other times. The varying amounts of sunlight around the Earth during the year, creates the seasons.
- Revolution - The Earth revolves around the Sun. The Earth takes 365.24 days to orbit the sun. As we move around the Sun during the year, the amount of light each area of the planet receives varies in length.
- The North Pole always POINTS in the same direction. The North pole always points the same way as the Earth revolves around the Sun.
It is winter time in countries in the Northern Hemisphere. It is summer time in countries in the Southern Hemisphere.
During the summer, the sun's rays hit the Earth at a steep angle because the sun is higher in the sky. The light does not spread out very much, thus increasing the amount of energy hitting any given spot. During the winter, the sun's rays hit the Earth at a shallow angle because the sun is lower in the sky. These rays are more spread out, which minimizes the amount of energy that hits any given spot.
Click here to watch What Causes Earth's Seasons.

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