How Light Travels in Straight Lines for Vision

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Demonstrate that light rays travel in straight lines and must enter the eye for objects to be seen.

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Light, Shadows, Reflection, and Refraction

3rd Grade · Science · Open Global Science

8 lessons

Goal

Demonstrate that light travels in straight lines, explain shadow formation and size patterns, and investigate reflection, refraction, and the color spectrum.

8 lessons

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How Light Travels in Straight Lines for VisionYou are here
Transparent, Translucent, and Opaque MaterialsPremiumUp next
How Shadows Form When Opaque Objects Block LightNot started yet
Patterns in Shadow Size: Distance and AngleNot started yet
Reflection from Flat, Rough, and Spherical SurfacesNot started yet
Refraction: How Light Bends Through Water and GlassNot started yet
Optical Lenses: Convex and Concave FocusingNot started yet
Splitting White Light into the Color SpectrumNot started yet

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Learning standards covered

OGS.4.PS.7Open Global Science Standards 2026™ · 3rd Grade

Demonstrate that light travels in straight lines and is required for vision; observe reflection from flat, rough, and spherical surfaces; explain how shadows are formed when opaque objects block light paths; identify patterns in shadow size variations; explore refraction and optical lenses; and recognize that white light is a spectrum of colors.