The Dynamic Sun

In this video from NOVA’s Sun Lab, learn about the Sun’s ever-changing surface and magnetic field. Images and animations illustrate how the Sun’s magnetic field lines are affected by the motion of the Sun’s plasma. Over time, the magnetic field becomes twisted and more complex, which increases solar activity. When magnetic field loops break through the surface, relatively cool regions of plasma form sunspots. The crossing of magnetic field lines creates solar flares and coronal mass ejections. About every 11 years, the north and south magnetic poles exchange places, flipping the magnetic field and creating a regular cycle of high and low solar activity. This video is available in both English and Spanish audio, along with corresponding closed captions. CREDITS: https://www.pbslearningmedia.org/credits/nvsl.sci.space.dynamic/ LICENSE: https://www.pbslearningmedia.org/help/full-license-for-section-3c-of-terms-of-use-download-and-share/

LicenseCustom License

More videos by this producer

The Coriolis Effect Due to Earth's Rotation

Learn how Earth’s rotation causes the Coriolis effect, with this video from NOVA. Use this resource to visualize the abstract concept of the Coriolis effect and to provide opportunities for students to use evidence to support a claim about the influence of the Coriolis effect on hurricanes, jet stre

Personal DNA Testing

In this video from NOVA scienceNOW, take a behind-the-scenes look at the process of personal DNA testing, and hear more about the innovative Personal Genome Project. CREDITS: https://www.pbslearningmedia.org/credits/biot09.biotech.concpt.prsnldna/ LICENSE: https://www.pbslearningmedia.org/help/ful

How DNA Replicates

This narrated animation from Interactive NOVA: "The Secret of Life" shows the double helix structure of DNA and how the molecule replicates. The segment illustrates how DNA "unzips" to form templates for the new strands and how complementary nucleotides bind together like the rungs of a ladder. This