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Physical ScienceGrade 7-9

Refraction and Lenses Answer Key

See how light bends when it passes through different materials and how lenses focus light.

Looking for Refraction and Lenses answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Refraction and Lenses Gizmo.

100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026

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Refraction

Q1.What is refraction?

Answer

The bending of light when it passes from one material into another (like from air into glass).

Q2.Why does light bend?

Answer

It changes speed when it enters a different medium - light slows down in denser materials.

Q3.What's a real-life example of refraction?

Answer

A straw looking bent in a glass of water, or a rainbow forming when sunlight passes through raindrops.

Types of Lenses

Q4.What does a convex (converging) lens do?

Q5.What does a concave (diverging) lens do?

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