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Unstoppable Solar Cycles

Format: DVD | Streaming | Download
Length: 13:45
Grade Level: 4-12+ | Price: $ 15.00
Closed Captioned

What's the role of carbon dioxide in warming?

When Erik the Red first arrived in Greenland, the fertile land was perfect for farming. But within a few centuries, the thriving Viking settlements had been wiped out by global cooling. The Little Ice Age is one of many climatic eras that have been scientifically identified. Since about 1850 the earth has been in a warming period.

What is the role of carbon dioxide in warming? The best available records of temperature and atmospheric CO2 over the past 650,000 years indicate that the earth's temperature always rises first, followed by a rise in carbon dioxide. If a warmer earth leads to increased levels of CO2—and not the other way around—can humans' use of fossil fuels be the cause of global warming? Shouldn't this critical question remain open to scientific inquiry?

Subject Areas

Science & Technology

World History / Geography


Climate Change


Scientific Method


This video provided an excellent opposing view for An Inconvenient Truth. I used it to set up a debate with my honors class.

Barbara Turner
Science - 8
Indian Creek Junior High School, Mingo Junction, OH

This video did help to spur on great conversations about what we are being told in the media and what we hear from the science community. I was eager to share this with my students to help them see other view points, and to help them see the importance of looking beyond popular theory.

Amber Grove
Science - 6
Eagle Middle School, Eagle, ID

This was an excellent, classroom friendly resource in which scientists were allowed to raise critical questions in the climate change debate- great video!

Damian Holmes
Social Studies - 9,10
Salem High School, Conyers, GA

I teach a unit in the spring on global warming and climate change. This video is an excellent enhancement to that unit. My students were really intrigued, and it got them thinking. When we start this unit in the spring, I will show it again. Thanks for your videos!

Laura Wilson
All - 4
Comfort Elementary School, Comfort, TX

The Izzit videos are wonderful at challenging my students to think. So often they are only given one side of a story, especially in science, but to truly deepen their understanding of the scientific process they need opportunities to practice skepticism. The Izzit videos are a great tool to do just that. Thank you!

Caine Kolinski
Science - 11
Clay High School, Oregon, OH

I really enjoyed the video and so did my students! Using video is a great way to inspire students. After viewing the video, they were interested in researching the subject on their own and producing higher quality writing.

Erica Schmidt
English/Lang. Arts - 7,8
Castillero Middle School, San Jose, CA

Thank you for all you do. This made the students stop and rethink what media is reporting to them. After watching Unstoppable Solar Cycles, the students had many questions. This was not like watching any other video; this one left my kids asking more questions and wanting more answers.

Judy Scheffler
Science - 6,8
Poth Junior High School, Poth, TX

Unstoppable Solar Cycles is a very thought-provoking video. My students learned that there are "other" opinions that are based on scientific principles that are part of the global warming debate. During and after the video, students were engaged in thoughtful discussion, and best of all, they have discovered they have many more questions to explore! Thank you!

Catherine Salzer
All - 5
Lake Harbor Middle School, Mandeville, LA

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