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Ch. 10 , Lesson 5( Light )

What is light?

• One kind of energy that let us see.

When light hits an object, some of it reflects

= bounce off

Vocabulary:LightReflectRefraction

Objectives:I will be able to know:1-how light can reflect off an object.2-understand reflection and refraction.

Light

Reflect

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Ch. 10 , Lesson 5( Light )

When light reflects off smooth, flat objects like a mirror it bounces in one direction, and you can see your picture.

When light reflects off rough objects it bounces in many directions, and you can see your reflection funny.

Vocabulary:LightReflectRefraction

Objectives:I will be able to know:

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Ch. 10 , Lesson 5( Light )Vocabulary:LightReflectRefraction

Objectives:I will be able to know:

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Ch. 10 , Lesson 5( Light )

When object blocks light, it makes a shadow.

Is a dark area that light doesn’t reach.

You can make a shadow on the wall by blocking light with your hand.Some objects don’t block light, so they don’t make shadow.

Vocabulary:LightReflectRefraction

Objectives:I will be able to know:

Shadow

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Ch. 10 , Lesson 5( Light )

Glass or water can bend light, this is called

Light bends when it travels through hand lens. Bent light make objects look bigger.

Vocabulary:LightReflectRefraction

Objectives:I will be able to know:

Refraction

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Ch. 10 , Lesson 5( Light )

How do we use light?Much of Earth’s light is from the sun.Living things need the energy from sunlight.Without the sun, Earth would be in darkness.Nothing would be able to live or grow here.

Vocabulary:LightReflectRefraction

Objectives:I will be able to know:Identify different uses of light.

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Ch. 10 , Lesson 5( Light )

People once used fire for light indoors and at night.

Now we use electric lights to help us see.

Vocabulary:LightReflectRefraction

Objectives:I will be able to know: