1. Light
S4P1: Students will investigate the nature of light using tools such as mirrors, lenses, and prisms.

2. Essential Question:
What are the characteristics of light and how does it normally behave?

3. Light: a form of energy that you can see
Vocabulary
Light: a form of energy that you can see
Opaque: Not allowing light to pass through
Shadow: an area where light does not strike the ground

4. More Vocabulary:
Translucent: allows only some light to pass through
Transparent: lets light pass through

5. What is light? Light is a form of energy that you can see.
Energy is the ability to cause change.
We can see objects because of light.
Light energy moves in waves and travels in straight lines from its source.

6. Essential Question
How is light reflected?

7. Reflection
When light hits a smooth, shiny object it reflects or bounces off of it.

8. Refraction
Essential Question: How is light refracted?

9. Refraction
Refraction is the slowing down and bending of light

10. Lenses in cameras and your eye help you to see objects using refraction

11. Review:
Mirrors and other smooth surfaces _______ all the light that strikes them.
Light can _____ or bend, when it passes through air, water, and glass.
The ____ in your eyes _____ light to form an image in your retina and your brain interprets that image.

12. Light Review ____ occurs when light bounces off of an object
_____ occurs when light is bent
When light strikes a surface that is rough, the light will _____
When light strikes a surface that is smooth, the light will bounce off at equal _____

13. Lens Lenses are a ______ type of material.
The path of light that a ______ lens follows is directed toward a single focal point.
_____ lenses help me to see objects far away.

14. What is Color?
When light strikes an object, the color of the light affects the way the object is seen.

15. Prism
Sun light is white light that is really a collection of light wave of different colors.
A prism is a piece of glass that separates white light into colors.

16. Color
A colored object absorbs some colors of light but reflects other colors.
Bananas look yellow because they reflect yellow light. They absorb all the other colors.