Light and Matter

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Science IV Term...

Date: May 8th, 2024
Session: 103
Purpose: Unit 14: Properties of light

​Class Register

​SFB page

Multiple Choice

Why do lighthouses use lenses?

• To focus and amplify the light emitted by the source.
• To attract birds for observation.
• To confuse ships and lead them astray.
• To create a rainbow effect for entertainment purposes.

​Write the Lesson Vocabulary

​SFB page

​READ AND ANSWER

Dropdown

Complete the sentence by using the text.



Most objects​

Select answer

some of the light and the amount of light absorbed ​

Select answer

the material the object is made of.

​READ AND ...

• Underline the definition of OPAQUE.

• Underline the examples of solid, opaque materials.

• Underline the cause of shadows.

Multiple Choice

If light cannot pass through a material, where does it go?

• It turns into heat energy
• The light is absorbed by the material; it stays in that material.

• It transforms into sound waves
• It disappears into another dimension

Multiple Choice

What are these materials called?

• Opaque

• Translucent

• Transparent

​READ AND UNDERLINE ...

• Underline the definition of TRANSPARENT.

• Underline the EXAMPLES of materials that are transparent.

• Underline the definition of TRANSLUCENT.

• Underline the EXAMPLES of materials that are translucent.

Multiple Choice

If no light is absorbed by a material, where does most of the light go?

• Absorbed by the material
• Dissipated into the air
• Transformed into heat energy
• It passes through the material

Multiple Choice

What are these materials called?

• Opaque

• Transparent

• Translucent

Multiple Choice

Choose the option that tells whether the light or lampshade is opaque, translucent, or transparent. and its explanation of how light interacts with each material.​

• The lampshade is translucent. It absorbs some light and lets some little light pass.

• This clear light bulb is transparent. The glass absorbs almost no light and lets the light pass though.

• This solid lampshade is opaque. It absorbs or reflects all of the light that hits it.

Multiple Choice

Choose the option that tells whether the light or lampshade is opaque, translucent, or transparent. and its explanation of how light interacts with each material.​

• The lampshade is translucent. It absorbs some light and lets some little light pass.

• This clear light bulb is transparent. The glass absorbs almost no light and lets the light pass though.

• This solid lampshade is opaque. It absorbs or reflects all of the light that hits it.

Multiple Choice

Choose the option that tells whether the light or lampshade is opaque, translucent, or transparent. and its explanation of how light interacts with each material.​

• The lampshade is translucent. It absorbs some light and lets some little light pass.

• This clear light bulb is transparent. The glass absorbs almost no light and lets the light pass though.

• This solid lampshade is opaque. It absorbs or reflects all of the light that hits it.

Multiple Choice

Choose the option that tells whether the light or lampshade is opaque, translucent, or transparent. and its explanation of how light interacts with each material.​

• The lampshade is translucent. It absorbs some light and lets some little light pass.

• This clear light bulb is transparent. The glass absorbs almost no light and lets the light pass though.

• This solid lampshade is opaque. It absorbs or reflects all of the light that hits it.

​SFB page

​READ, UNDERLINE AND ANSWER

• Underline the definition of REFLECTION.

• Underline the effect when light strikes a surface such as a mirror.

• Underline the examples of rough surfaces.

Multiple Choice

REFLECTION means..

• Reflection is the absorption of light by a surface
• Reflection is the bending of light as it passes through a medium
• Reflection is the process of light passing through a transparent material
• The result of light bouncing, or bending, back after striking a smooth object

Multiple Choice

Which of the following best describes the phenomenon when light traveling from an object strikes a smooth, shiny surface like a mirror?

• Reflection
• Absorption
• Diffraction
• Refraction

Dropdown

When light hits a mirror, all of the light hitting the surface from ​

Select answer

is reflected in a single ​

Select answer

direction.

Multiple Choice

These are examples of Rough Surfaces

• Sandpaper, concrete, tree bark
• Polished metal
• Smooth marble
• Glass shards

​READ AND ANSWER

Multiple Choice

The surface of water acts like a ....

• wood
• metal
• glass
• mirror

Multiple Choice

The image you see in a mirror is ...

• a direct view of the objects
• an illusion created by the mirror
• a reflection of the objects in front of it

Multiple Choice

​The backpack appears yellow because...

• Refraction and dispersion of light
• Reflection and absorption of light
• Absorption of sound waves
• Scattering of heat

Multiple Choice

Compare the surfaces of the metal container and the paper bag. The smooth surface reflects light in a single direction back to your eyes. The rough surface reflects light in all directions. Identify and explain the reason for the material that would produce a better reflection.

• Metal container - because metals have a smoother surface and are more reflective than wood.

• Wooden container - because wood has a smoother surface that allows light to bounce off more uniformly.

• Both wooden and metal containers would produce similar reflections as long as their surfaces are polished evenly.

​READ, UNDERLINE AND ANSWER

• Underline the effect of an object when reflecting light.

• Underline how Black objects work with light.

• Underline how white clothes work with light.

Multiple Choice

What does the absorption of light have to do with color?

• Absorption of light changes the texture of objects, not their color.
• Absorption of light has no impact on color perception.
• Absorption of light determines the color we see.
• Absorption of light only affects brightness, not color.

Multiple Choice

What happens to the light as it strikes the surface of each kind of fruit?

• The light is reflected differently based on the surface of each kind of fruit.
• The light passes through the fruit without any effect
• The light changes color when it hits the fruit
• The light is absorbed by the fruit

Open Ended

When we look at these fruits and vegetables, we see a variety of colors.

Choose one fruit or vegetable. Explain why it’s the color it is.​

​SFB page

​READ, UNDERLINE AND ANSWER

Underline:

• The definition of REFRACTION.

• How Speed of Light Varies.

• Why light bends.

Multiple Choice

The bending of light as it passes at an angle from one type of matter into another is called

• Absorption
• Diffraction
• Refraction
• Reflection

Multiple Choice

When does light bend?

• When it travels in a straight line
• when it changes speed

Multiple Choice

What causes light to change speed?

• Change in magnetic field
• Change in gravitational force
• Change in temperature
• Changing from one type of matter to another type of matter

Multiple Choice

When refraction occurs, why do our eyes perceive a bend in an object?

• Light reflects off the object at an angle
• The object physically changes shape
• Our eyes create an illusion of bending
• One section of the object is reflecting light at one rate; another section of the object is reflecting light at another rate.

​SFB page

​READ, UNDERLINE AND ANSWER

UNDERLINE

• Definition of Prism

• How a rainbow is made?

• Definition of Diffraction.

• How Blurriness is caused.

Multiple Choice

What is a Prism?

• A prism is a type of animal.
• A prism is a type of fruit.
• A prism is a solid geometric figure with two parallel and congruent faces called bases.

Multiple Choice

What does a prism have to do with refraction?

• Prism has no impact on the speed of light passing through it.
• A prism uses refraction to separate white light into the colors of visible light.

• Prism reflects light instead of refracting it.
• Prism absorbs light and does not affect refraction.

Multiple Choice

How are diffraction and refraction similar and different?

• Diffraction and refraction both involve the reflection of waves
• Diffraction is caused by changes in medium, while refraction is caused by obstacles
• Diffraction and refraction are both related to the speed of light
• Diffraction and refraction are similar in that they both involve the bending of waves, but they are different in terms of the causes of bending - diffraction is related to obstacles/apertures, while refraction is related to changes in medium.

Open Ended

The diagram shows how light bends as it enters and then exits a transparent material. Use a protractor to measure the angles formed as the light is refracted.​

​READ AND ANSWER

Match

Match the following

• ​Rainbows

• Sunlight

• Violet light comes from

• Light from many droplets

• Red light comes from

Caused by refraction and reflection

separates into colors

lower droplets.​

forms the arcs of color in a rainbow.

droplets higher in the air

• Caused by refraction and reflection

• separates into colors

• lower droplets.​

• forms the arcs of color in a rainbow.

• droplets higher in the air

Draw

BONUS:

Illustrate a prism forming a rainbow.