Learn on PengiAmplify Science (California) Grade 8Chapter 1: Changes Caused by Light

Lesson 1: Pre-Unit Assessment

Key Idea.

Section 1

The Australia Skin Cancer Mystery

Key Idea

When we compare global health data, a striking contradiction emerges.

Australia has a significantly higher skin cancer rate than the rest of the world.

Section 2

Light Causes Physical Change

Key Idea

To solve this mystery, we must first establish a basic physical fact: Light is an active force.

We know this because we observe light changing materials every day. For example, sunlight fades the color of paper, dries up wet clay, and burns human skin.

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

The Australia Skin Cancer Mystery

Key Idea

When we compare global health data, a striking contradiction emerges.

Australia has a significantly higher skin cancer rate than the rest of the world.

Section 2

Light Causes Physical Change

Key Idea

To solve this mystery, we must first establish a basic physical fact: Light is an active force.

We know this because we observe light changing materials every day. For example, sunlight fades the color of paper, dries up wet clay, and burns human skin.