Light is not just something we see.  It can be produced naturally, or in many other ways.  Light can move in a straight line, or we can block, bend, or focus light to make it go where we want it to go.  Light is used by plants to make food, and it is used by some animals to keep warm.  Think of all the places where you use light.

 Essential Question

What is light?

Targets

At the end of this unit, you should be able to answer the following questions:

1. Where is light found in our world? (sun, electric lights, objects that glow)

1.1 What objects emit their own light? What objects need a light source to be seen?

1.2 How is looking at the sun or bright light dangerous?

2. How does light interact with other materials?

2.1 How can we use light to classify objects as transparent, translucent, or opaque?

2.2 How do objects create shadow?

3. How does light travel?

3.1 What happens when light hits a surface? (absorbed, reflected, or refracted)

3.2 How can light be broken into colours or combined to make a new colour?

3.3 How do various optical devices work? 

 Science Connection

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