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What belongs in each mystery box?

Every mystery box holds the same value. Make the two sides balance.

2 × ? + 315Equal values make a level balance.

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Streaks count different challenges solved consecutively in this session and reset after an incorrect check. Repeating a solved question adds no points. Original rule-based practice. Age bands are guidance, not an assessment or curriculum certification.

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ScienceAges 7-9Physics (O Level): Waves, light & sound
Question 1 of 4
Light, reflection & shadows

How do we see a non-luminous object such as a printed book page?

Explore how light travels in straight lines, reflects from mirrors and forms shadows behind opaque objects.

Light Ray (Straight Line) · Angle i = Angle r
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Science category

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Conductors, insulators & circuits

Compare conductors and insulators, series and parallel circuits, switches, fuses and circuit symbols.

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