5 th grade science objective 3 lesson 25 reflection and refraction of light pps 137 141
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5 th Grade Science Objective 3 Lesson 25 Reflection and Refraction of Light pps. 137-141 PowerPoint PPT Presentation


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5 th Grade Science Objective 3 Lesson 25 Reflection and Refraction of Light pps. 137-141. At the end of this lesson, you will be able to predict how light will behave when it reflects, or bounces off a surface, or when it is transmitted, or passes through a curved piece of glass. Vocabulary.

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5 th Grade Science Objective 3 Lesson 25 Reflection and Refraction of Light pps. 137-141

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5 th grade science objective 3 lesson 25 reflection and refraction of light pps 137 141

5th Grade ScienceObjective 3Lesson 25 Reflection and Refraction of Light pps. 137-141

At the end of this lesson, you will be able to predict how light will behave when it reflects, or bounces off a surface, or when it is transmitted, or passes through a curved piece of glass.


Vocabulary

Vocabulary

  • Refraction:

    • The bending of light that occurs when light moves from one material to another

  • Lenses:

    • Objects used to refract light

  • Reflection:

    • The bouncing of light from a surface

  • Absorb:

    • When light does not reflect or refract and mostly turns to heat.


Guided questions pps 137 138

Guided Questions pps. 137-138

  • What is reflection?

    • The bouncing of light from a surface

  • When is light transmitted?

    • When it passes through objects

  • What happens to absorbed light?

    • It is not reflected or refracted and mostly turns to heat.


Guided questions pps 137 138 cont

Guided Questions pps. 137-138 cont.

  • When does light refract?

    • When it passes from one kind of matter into another and is bent

  • How does a lens work?

    • It refracts light from an object as it goes through the glass


Guided instruction pps 138 139

Guided Instruction pps. 138-139

  • When is light reflected? Give an example.

    • Light is reflected when it bounces off any object

  • Why does light refract? Give an example.

    • Light refracts when it passes through one kind of matter into another at different speeds.


Guided instruction pps 138 139 cont

Guided Instruction pps. 138-139 cont.

  • Compare reflection and refraction.

    • Light refracts when it is transmitted through different kinds of matter, causing the speed of the light to change. Light reflects when it bounces back from a surface.

  • List three tools that use lenses to refract light.

    • Ex: eyeglasses, cameras, and microscopes. (Anything that contains lens)


Guided instruction pps 138 1391

Guided Instruction pps. 138-139

  • A diagram of a telescope is shown below. On the lines below, label each part of the telescope as either a mirror or a lens.

A. Lens

B Mirror

C Mirror


Apply the teks pps 139 140

Apply the TEKS pps.139-140

  • Where in the eye does refraction take place?

    • Refraction occurs in the lens.


Apply the teks pps 139 1401

Apply the TEKS pps.139-140

  • Describe what part of the eye detects light.

    • The retina detects light


Apply the teks pps 139 1402

Apply the TEKS pps.139-140

  • Based on the diagram above , how is light refracted when it goes through the lens in a normal eye?

    • Ex: The diagrams show the eye’s lens focusing light rays on the retina and upside down in a normal eye.


Apply the teks pps 139 1403

Apply the TEKS pps.139-140

  • How do you think eyeglasses could improve the sight of a nearsighted person? Explain

    • Ex: Lenses spread light rays apart or move light rays together. A nearsighted eye focuses light in front of the retina. Spreading the light will move the light farther back in the eye on the retina.


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