How Light Travels (Part 2)

What You'll Learn

Light travels in straight lines and can be reflected, refracted, or absorbed. Mirrors reflect light, lenses refract (bend) light, and dark surfaces absorb light.

Key Words

observation
experiment

Materials Needed

plastic wrap
cardboard
tape
scissors

Safety First

Tie back long hair before starting the experiment.
Protect your work surface with newspaper or plastic.

Steps

Step 1 — Read

Read about Data and Evidence and write down three key facts.

Step 2 — Do

Design an experiment to test a hypothesis. Identify your independent variable, dependent variable, and controls. Run the experiment and present results.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Check Your Understanding

Question 1

1 of 3

What is sound?