Scientists know mass is energy, but what is energy? An engaging Space Time video delves into the topic as part of its The Origin of Matter and Time playlist. From quarks and gluons with no mass to the gravitational effect, the true nature of mass appears. The video discusses inertial mass, gravitational mass, and mass as a fundamental property.

Concepts

matter, mass, the theory of general relativity, energy, photons, conservation of momentum

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Additional Tags

science

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Instructional Ideas

• Review the curvature of space prior to watching the video

Classroom Considerations

• Intended for advanced science students with prior knowledge of physics and quantum mechanics
• Avoid displaying the comment section when showing the video in the classroom

• This video is hosted on YouTube

Pros

• Offers subtitles in English, Russian, and Swedish for ELLs
• Includes links for further reading on the topic

Cons

• None

Common Core

SL.9-10.2 SL.11-12.2 RST.9-10.4 RST.11-12.4