If you think the world revolves around you, think again! In this super-short clip, the narrator explains, accompanied by drawings, how scaling varies based on your frame of reference or vantage point. You might want to add this clip to your presentation on the expansion of the universe.

Concepts

the big bang theory, scale factors, ratios

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Additional Tags

big bang, origin of universe, expansion of universe, scaling, frame of reference, science

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Classroom Considerations

• This video is hosted on YouTube

Pros

• Neat and attractive animation keeps viewers engaged
• An interesting topic, explained with clear narration and drawings

Cons

• A little short, but definitely of value