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/
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Learn about gravitational waves and how they can be detected in this video from NOVA: Black Hole Apocalypse. Use this resource to visualize abstract concepts related to waves and wave interactions and to provide opportunities for students to develop and use models and to communicate explanations wit
Learn how gravity can be described as the curving of spacetime, according to Einstein’s general theory of relativity, in this video from NOVA: Black Hole Apocalypse. Computer animations illustrate the concept of warped spacetime and how objects “fall” along a curved path. Use this resource to visual
In this video segment adapted from NOVA scienceNOW, learn how scientists are hoping to better understand the biology of dinosaurs by studying the insides of fossil bones. Hear about the accidental discovery of dinosaur soft tissue by paleontologist Dr. Mary Schweitzer, and how this tissue enables sc
