Copy of Unit C.2.1 | Light | Lesson 2 | Science 8

Multiple Choice

What is white light defined as?

• A single color

• A mixture of all wavelengths

• Invisible light

• Only sunlight

Multiple Choice

White light is made up of all the different colors mixed together.

• True

• False

Multiple Choice

Fill in the blank: Sunlight is just ______ light.

• blue

• red

• white

• green

Multiple Choice

Why does sunlight allow us to see different colors?

• It is made of a single color

• It is white light

• It is invisible

• It is only red light.

Multiple Choice

Which of the following statements is true?

• A) White light is only found in artificial sources

• B) White light is a mixture of all visible wavelengths

• C) White light is only blue

• D) White light cannot be seen.

Multiple Choice

What happens to the colors in sunlight when it shines on a tomato?

• All colors are reflected

• Red is reflected, others are absorbed

• All colors are absorbed

• Blue is reflected, others are absorbed.

Multiple Choice

Why does a tomato appear red?

• Because it absorbs red light

• Because it reflects red light

• Because it emits red light

• Because it changes the light color.

Multiple Choice

Fill in the blank: A tomato is red because the atoms inside the tomato get excited and produce ______.

• Electrons

• Photons

• Neutrons

• Protons

Multiple Choice

What is the role of photons in color perception?

• They absorb light

• They reflect light

• They are a form of energy that our eyes can see as light

• They change the color of light.

Multiple Choice

How do our eyes perceive different colors?

• By changing the color of light

• By reflecting all colors

• By figuring out what color different photons are

• By absorbing all colors.

Multiple Choice

What happens to light when it hits a reflective material?

• It is absorbed

• It is reflected

• It is refracted

• It disappears.

Multiple Choice

Light can be ______ by some materials.

• reflected

• absorbed

• refracted

• all of the above

Multiple Choice

What is the term used when light bends and changes direction as it passes through a material?

• Reflection

• Absorption

• Refraction

• Diffusion

Multiple Choice

Depending on the material, light might refract, reflect, or be ______.

• absorbed

• emitted

• scattered

• intensified

Multiple Choice

Which of the following is NOT a way light interacts with materials?

• Reflection

• Absorption

• Refraction

• Conduction

Multiple Choice

Which of the following materials is a good reflector of light?

• Water

• Dark clothing

• Metals

• Wood

Multiple Choice

Fill in the blank: _______ are one of the best surfaces that reflect light and do not absorb or refract any of it.

• Metals

• Mirrors

• Dark clothing

• Water

Multiple Choice

What happens to light when it hits a mirror?

• It is absorbed

• It is refracted

• It is reflected

• It is scattered

Multiple Choice

Why do dark clothes make you feel warmer in the sun?

• A) They reflect more sunlight

• B) They absorb more sunlight

• C) They refract sunlight

• D) They scatter sunlight.

Multiple Choice

Fill in the blank: Most metals absorb light well, especially _______ metals.

• Lighter

• Darker

• Shiny

• Transparent

Multiple Choice

Which material is known for being sparkly due to its ability to refract and bend light?

• Glass

• Diamond

• Plastic

• Wood

Multiple Choice

High quality windows use ______ that allows almost all light to refract through it.

• Plastic

• Metal

• Glass

• Wood

Multiple Choice

Experts can tell if a diamond is real based on how much light it ______.

• Reflects

• Absorbs

• Refracts

• Emits

Multiple Choice

What causes a glare in lower quality windows?

• Reflected light

• Refracted light

• Absorbed light

• Emitted light

Multiple Choice

Diamonds are sparkly because they ______ light.

• Emit

• Absorb

• Refract

• Reflect

Multiple Choice

What does light transmission refer to?

• The color of light

• The speed of light

• How well a material allows light to pass through it

• The source of light.

Multiple Choice

Which term describes a material that does not allow light to pass through?

• Transparent

• Translucent

• Opaque

Multiple Choice

Fill in the blank: A material with molecules that are very close together is likely to be _______.

• Transparent

• Translucent

• Opaque

Multiple Choice

Which of the following materials would allow some light to pass through but not all?

• A) Transparent

• B) Translucent

• C) Opaque

Multiple Choice

Fill in the blank: Materials with less dense molecules are usually _______.

• Transparent

• Translucent

• Opaque

Multiple Choice

What is a transparent material?

• A material that blocks light completely

• A material that allows light to pass through completely

• A material that reflects light

• A material that absorbs light.

Multiple Choice

Which of the following is an example of a transparent material?

• Wood

• Metal

• Glass

• Stone

Multiple Choice

Fill in the blank: A transparent material is one that allows light to pass through ______.

• Partially

• Completely

• Not at all

• With difficulty

Multiple Choice

True or False: We cannot see objects on the other side of a transparent material.

• True

• False

Multiple Choice

Which of the following is NOT a transparent material?

• Air

• Water

• Glass

• Wood

Multiple Choice

What is a translucent material?

• A material that allows all light to pass through

• A material that allows some light to pass through

• A material that does not allow any light to pass through

• A material that reflects all light.

Multiple Choice

Which of the following is an example of an opaque material?

• Wax paper

• Frosted glass

• Cardboard

• Jelly

Multiple Choice

Fill in the blank: An opaque material is a material that does not let any light pass through. Examples include cardboard, metal, cell phones, and ____.

• A) Jelly

• B) Dice

• C) Clouds

• D) Paper cups

Multiple Choice

Which of the following is NOT a translucent material?

• Wax paper

• Frosted glass

• Metal

• Jelly

Multiple Choice

Fill in the blank: A translucent material allows some light to pass through, but not all. Examples include wax paper, frosted glass, jelly, clouds, and ____.

• A) Cardboard

• B) Paper cups

• C) Metal

• D) Cell phones

Multiple Choice

What determines if an object is transparent, translucent, or opaque?

• The color of the object

• Whether light can pass through it

• The size of the object

• The weight of the object

Multiple Choice

If an object casts a shadow, it is considered ______.

• Transparent

• Translucent

• Opaque

Multiple Choice

Which of the following is true about a transparent object?

• A) It casts a shadow

• B) Light cannot pass through it

• C) Light passes through it

• D) It is always colored.

Multiple Choice

An object is translucent if: A) It does not cast a shadow B) Some light passes through and the shadow is hard to see C) It completely blocks light D) It is invisible.

• It does not cast a shadow

• Some light passes through and the shadow is hard to see

• It completely blocks light

• It is invisible.

Multiple Choice

Fill in the blank: If an object does not cast a shadow, it is ______.

• Translucent

• Transparent

• Opaque

Multiple Choice

Which of the following objects is likely to be transparent?

• Wax paper

• Cardboard

• Plastic wrap

• Book

Multiple Choice

Which object is most likely to be opaque?

• Plastic bottle

• Paper

• Pencil case

• Wax paper

Multiple Choice

Fill in the blank: A _______ is typically translucent.

• Cardboard

• Wax paper

• Book

• Plastic bottle

Multiple Choice

Which of these objects would you expect to be translucent?

• Plastic wrap

• Cardboard

• Wax paper

• Book

Multiple Choice

Fill in the blank: A _______ is usually opaque.

• Plastic wrap

• Cardboard

• Wax paper

• Plastic bottle

Multiple Choice

Which of the following is a daily life application of refraction of light?

• Magnifying glass making words larger

• Spoon in a glass of water looking straight

• Formation of a shadow

• None of the above.

Multiple Choice

The magnifying glass helps to make the words ________.

• A) Smaller

• B) Larger

• C) Blurry

• D) Invisible

Multiple Choice

Spoon in a glass of water looks ________.

• Straight

• Bent

• Broken

• Invisible

Multiple Choice

The formation of ________ is an example of refraction of light.

• Shadow

• Rainbow

• Echo

• Mirage

Multiple Choice

What is light refraction?

• The bending of light as it passes from one transparent substance into another.

• The reflection of light off a surface.

• The absorption of light by a material.

• The emission of light from a source.

Multiple Choice

Light refraction occurs when light travels at an angle into a new transparent substance because the light changes ____.

• A) color

• B) speed

• C) direction

• D) intensity

Multiple Choice

When light travels through air and into water, it ____.

• speeds up

• slows down

• remains constant

• disappears

Multiple Choice

Which of the following changes when light enters a new substance?

• A) Its color

• B) Its speed

• C) Its source

• D) Its temperature

Multiple Choice

Refraction of light changes the angle or direction of the ____.

• light ray

• sound wave

• magnetic field

• electric current

Multiple Choice

What happens to the speed of light when it travels from air into water?

• A) It speeds up

• B) It slows down

• C) It remains the same

• D) It stops

Multiple Choice

The angle at which the incident ray hits the surface is called the angle of ______.

• Refraction

• Reflection

• Incidence

• Diffraction

Multiple Choice

Which of the following factors affects the amount of bending of light?

• Color of light

• Change of speed

• Temperature

• Humidity

Multiple Choice

If the light enters the new substance at a greater angle, the amount of refraction will be ______.

• Weaker

• Stronger

• Unchanged

• Reversed

Multiple Choice

In the diagram, what is the new path of the ray called after it changes direction?

• Incident ray

• Reflected ray

• Refracted ray

• Normal ray

Multiple Choice

What is the refractive index of water?

• 1.00

• 1.33

• 1.5

• 2.4

Multiple Choice

Fill in the blank: The speed of light in glass is _____ km/s.

• 300

• 226

• 200

• 125

Multiple Choice

Which substance has the highest refractive index?

• Air

• Water

• Glass

• Diamond

Multiple Choice

What happens to light when it enters a substance with a higher refractive index?

• It speeds up

• It slows down

• It bends away from the normal

• It remains unchanged.

Multiple Choice

Fill in the blank: The angle of refraction for an incident ray entering diamond at 20° is _____ degrees.

• 20

• 14.9

• 13.2

• 8.2

Multiple Choice

When light travels through air into a diamond, it speeds up

• True
• Light slows down in diamonds
• False
• Light travels faster in diamonds than in air

Multiple Choice

When light travels through a diamond into water, it speeds up

• Ture

• False

Multiple Choice

If light went through glass into water, it would bend towards the normal line

• True
• False

Multiple Choice

A higher refractive index means the light slows down.

• True

• False

Multiple Choice

A higher refractive index means the light will change direction more.

• True

• False

Multiple Choice

What is an optical illusion?

• When we see something that is not there

• When we see something differently than what actually exists

• When our brain makes no mistakes

• When our senses are perfect.

Multiple Choice

Why do optical illusions happen?

• Because our brain and eye structure work together

• Because our brain never makes mistakes

• Because light does not affect our eyes

• Because we always see things correctly.

Multiple Choice

An optical illusion is caused by how the brain and the structure of the eye work together. True or False?

• True

• False

Multiple Choice

Fill in the blank: Our brain can be tricked by certain types of ______ we see.

• images

• sounds

• smells

• tastes

Multiple Choice

The lens of the eyeball focuses the light back onto the retina, where rods and cones are affected by the ______ of the light.

• wavelength

• color

• speed

• intensity

Multiple Choice

What type of illusion is described in the image?

• Cognitive illusion

• Physiological illusion

• Literal illusion

• Auditory illusion

Multiple Choice

When you quickly look at the image, your brain is tricked into seeing the lines ____.

• disappear

• change color

• spiral

• shrink

Multiple Choice

Why do we see movement in the image even though it is not moving?

• Because of the colors used

• Due to excessive brain stimulation

• Because the image is animated

• Due to poor lighting

Multiple Choice

What is the main feature of the optical illusion involving the elephant?

• The elephant has extra legs

• The feet are in the wrong places

• The elephant is missing a trunk

• The elephant is in color.

Multiple Choice

This image is an example of a ______ illusion.

• Literal

• Cognitive

• Physiological

• Emotional

Multiple Choice

How many legs does the elephant appear to have in the optical illusion?

• Four

• Five

• Six

• Seven

Multiple Choice

What is the term used to describe illusions where different people see different things?

• Visual Illusion

• Cognitive Illusion

• Physical Illusion

• Auditory Illusion

Multiple Choice

In the optical illusion shown, some people see a vase while others see ________.

• a tree

• a person looking at another person

• a cat

• a mountain

Multiple Choice

What determines what we see in a cognitive illusion?

• Our brain and thinking

• The color of the illusion

• The size of the illusion

• The time of day

Multiple Choice

What do you see in the image?

• A) A duck

• B) A rabbit

• C) Both a duck and a rabbit

• D) Neither

Multiple Choice

The image is an example of which type of optical illusion? Fill in the blank:

• Physiological illusion

• Literal illusion

• Cognitive illusion

Multiple Choice

What type of optical illusion is depicted in the image?

• Physiological illusion

• Literal illusion

• Cognitive illusion

Multiple Choice

Fill in the blank: The image shows a ______ illusion, which is a type of optical illusion.

• Physiological

• Literal

• Cognitive

Multiple Choice

What type of optical illusion is depicted in the image?

• Physiological illusion

• Literal illusion

• Cognitive illusion

Open Ended

What is a mirage?

Open Ended

Why do mirages form?

Open Ended

Why do mirages form in deserts?

Open Ended

Why do rainbows form?

Open Ended

Why are rainbows curved?