Properties Of Light: 9th Grade Science! Quiz
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Questions and Answers
- 1.
Light is a form of energy. Light travels from the Sun to the Earth. _______________________ and ________________________________________ are other examples of light on Earth. Often sources of light give off heat.
- A.
Fire and televisions
- B.
Lightbulbs and televisions
- C.
Fire and computers
- D.
Computers anlight bulbs
- E.
Fire and lightbulbs
Correct Answer
E. Fire and lightbulbsExplanation
Light is a form of energy that can travel from the Sun to the Earth. Fire and lightbulbs are other examples of light on Earth. These sources of light not only emit light but also give off heat.Rate this question:
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- 2.
Usually, a source of light gives off white light. White light is actually made up of ____________ colors. These colors range from red to violet.
- A.
One
- B.
Five
- C.
All
- D.
Two
- E.
No
Correct Answer
C. AllExplanation
White light is made up of all colors. When white light passes through a prism, it gets refracted and separates into a spectrum of colors ranging from red to violet. This phenomenon is known as dispersion. Each color in the spectrum corresponds to a different wavelength of light. Therefore, "all" is the correct answer as it accurately describes the composition of white light.Rate this question:
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- 3.
All light is made of waves. A __________________________________ is the distance from the top of one wave to the top of the next wave.
- A.
Wavelength
- B.
Distance length
- C.
Top point
- D.
High top
- E.
High point
Correct Answer
A. WavelengthExplanation
A wavelength is the distance from the top of one wave to the top of the next wave. This measurement is used to describe the size of waves in light. It represents the length of one complete cycle of the wave.Rate this question:
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- 4.
High-energy waves have ___________________ wavelengths and low-energy waves have _______________ ones.
- A.
Taller and shorter
- B.
Shorter and longer
- C.
Longer and faster
- D.
Longer and shorter
- E.
Shorter and taller
Correct Answer
B. Shorter and longerExplanation
High-energy waves have shorter wavelengths and low-energy waves have longer ones. This is because wavelength is inversely proportional to energy. Higher energy waves have more frequent oscillations, resulting in shorter distances between peaks or troughs. Conversely, lower energy waves have fewer oscillations, resulting in longer distances between peaks or troughs. Therefore, high-energy waves have shorter wavelengths and low-energy waves have longer wavelengths.Rate this question:
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- 5.
______________________ are places where light does not fall. They form when light is blocked. The light strikes an object but can't pass through it. It then has the shape of whatever is blocking the light.
- A.
Shadows
- B.
Forests
- C.
Houses
- D.
Chairs
- E.
Planets
Correct Answer
A. ShadowsExplanation
Shadows are places where light does not fall because they are formed when light is blocked. When light strikes an object but cannot pass through it, it creates a shadow that has the shape of whatever is blocking the light.Rate this question:
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- 6.
Light travels in straight lines or ___________________. Shadows prove this. Light spreads out from a source in all directions, however it can't ____________________.
- A.
Rays and bounce off
- B.
Bend and rays
- C.
Rays and eat
- D.
Bounce off and rays
- E.
Rays and bend
Correct Answer
E. Rays and bendExplanation
Light travels in straight lines or rays and bend. Shadows prove this. Light spreads out from a source in all directions, however it can't bounce off and rays.Rate this question:
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- 7.
Shadow size depends on where the light source is. The closer an object is to a light source, the ________________ the shadow.
- A.
Shorter
- B.
Smaller
- C.
Bigger
- D.
Taller
- E.
Skinnier
Correct Answer
C. BiggerExplanation
The closer an object is to a light source, the bigger the shadow. This is because when an object is closer to the light source, it blocks more of the light, resulting in a larger shadow being cast.Rate this question:
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- 8.
Most of the light that reaches your eyes is _____________________ light. Reflection occurs when light strikes a surface and __________________________ off.
- A.
Bounced and refraction
- B.
Reflected and bounces
- C.
New and bounces
- D.
Refraction and bounces
- E.
Old and bounces
Correct Answer
B. Reflected and bouncesExplanation
When light strikes a surface, it undergoes reflection, which means it bounces off the surface. Therefore, the correct answer is "reflected and bounces." This explanation is based on the understanding that reflection refers to the bouncing back of light when it encounters a surface.Rate this question:
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- 9.
Light changes direction when it is reflected off a surface. The light source going towards a surface has oncoming rays. These rays strike the surface such as a mirror at an _________________________ angle. Outgoing rays are those reflected by the surface. They are reflected at an angle called an ____________________ angle.
- A.
Outward and forward
- B.
Outgoing and incoming
- C.
Forward and outward
- D.
Incoming and outgoing
- E.
Cat and dog
Correct Answer
D. Incoming and outgoingExplanation
When light is reflected off a surface, the rays that are approaching the surface are called incoming rays. These rays strike the surface at an incoming angle. The rays that are reflected by the surface are called outgoing rays, and they are reflected at an outgoing angle. Therefore, the correct answer is "incoming and outgoing".Rate this question:
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- 10.
The Law of Reflection says that with reflection, the ______________________ angle is equal to the _____________________ angle.
- A.
Shark and whale
- B.
Oncoming and outgoing
- C.
Forward and outward
- D.
Outgoing and oncoming
- E.
Outward and forward
Correct Answer
B. Oncoming and outgoingExplanation
The Law of Reflection states that when light reflects off a surface, the angle at which it approaches the surface (known as the oncoming angle) is equal to the angle at which it leaves the surface (known as the outgoing angle).Rate this question:
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- 11.
Refraction is the _________________ of light as it ____________________ from one material to another.
- A.
Bending and bounces
- B.
Passing and bends
- C.
Bouncing and bends
- D.
Tree and grass
- E.
Bending and passes
Correct Answer
E. Bending and passesExplanation
Refraction is the bending of light as it passes from one material to another.Rate this question:
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- 12.
Most materials ____________________ the light falling on them but some materials allow light to pass through them. Refraction happens when light passes through glass, water, light plastic, and other _________________________ objects.
- A.
Reflect and opaque
- B.
Translucent and reflect
- C.
Reflect and transparent
- D.
Opaque and reflect
- E.
Reflect and translucent
Correct Answer
C. Reflect and transparentExplanation
Some materials reflect the light falling on them, while others allow light to pass through them. Refraction occurs when light passes through transparent objects such as glass, water, and light plastic.Rate this question:
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- 13.
Light travels at different speeds in different materials. The thicker a material, the _______________ light travels through it. As light travels more slowly it bends more.
- A.
Slower
- B.
Faster
- C.
More
- D.
Less
Correct Answer
A. SlowerExplanation
The correct answer is "slower". This is because light travels at different speeds in different materials, and the thicker the material, the slower light travels through it. As light travels more slowly in a thicker material, it also bends more.Rate this question:
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- 14.
Lenses are tools that refract light. They are used to gather light rays or to spread them apart. There are two kinds of lenses: ________________________ and _______________________.
- A.
Convex and conrex
- B.
Concave and concone
- C.
Convex and concone
- D.
Convex and concave
Correct Answer
D. Convex and concaveExplanation
Lenses are tools that refract light, meaning they bend or change the direction of light rays. Convex lenses are thicker in the middle and thinner at the edges, causing light rays to converge or come together. They are used to gather and focus light, commonly found in magnifying glasses and cameras. On the other hand, concave lenses are thinner in the middle and thicker at the edges, causing light rays to diverge or spread apart. They are used to correct nearsightedness and are commonly found in eyeglasses. Therefore, the correct answer is convex and concave.Rate this question:
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- 15.
Convex lenses bulge in the middle. A convex lens brings rays of light together. A concave lens curves inward. A concave lens spreads light rays apart.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
This statement is true because convex lenses do indeed bulge in the middle and bring rays of light together. On the other hand, concave lenses curve inward and spread light rays apart.Rate this question:
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- 16.
When light reaches your eye it first passs through a thin, clear tissue overing each eye called the ________________________.
- A.
Pupil
- B.
Cornea
- C.
Retina
- D.
Optic nerves
Correct Answer
B. CorneaExplanation
The cornea is a thin, clear tissue that covers the front of the eye. It is the outermost layer of the eye and acts as a protective barrier. When light enters the eye, it first passes through the cornea before reaching the other parts of the eye, such as the pupil, retina, and optic nerves. The cornea helps to focus the incoming light onto the retina, which then sends signals to the brain for visual processing.Rate this question:
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- 17.
Then light passes through an opening called the _____________________. It's the black spot in the center of your eye.
- A.
Cornea
- B.
Optic nerves
- C.
Pupil
- D.
Retina
Correct Answer
C. PupilExplanation
The pupil is the correct answer because it is the opening through which light enters the eye. It is located in the center of the eye and appears as a black spot. The pupil adjusts in size depending on the amount of light present, allowing the eye to control the amount of light that enters the eye and reaches the retina, which is responsible for detecting light and sending signals to the brain via the optic nerves. The cornea, on the other hand, is the transparent outer covering of the eye, and while it does play a role in focusing light, it is not the opening through which light passes.Rate this question:
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- 18.
After light passes through your pupil, it travels through your lenses. Each lens focuses light on the back of your eye. A tissue called the __________________ covers the back of your eye.
- A.
Lens
- B.
Cornea
- C.
Optic nerves
- D.
Pupil
- E.
Retina
Correct Answer
E. RetinaExplanation
After light passes through your pupil and travels through your lenses, each lens focuses the light on the back of your eye. The tissue called the retina covers the back of your eye. The retina is responsible for converting the focused light into electrical signals that are then sent to the brain through the optic nerves for visual processing.Rate this question:
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- 19.
The images focused on your retina are actually upside down. Your retinas change the image into signals that travel along your _____________________________ to your brain. Your brain sees the picture rightside up.
- A.
Optic nerves
- B.
Retina
- C.
Pupil
- D.
Lens
- E.
Cornea
Correct Answer
A. Optic nervesExplanation
The images focused on your retina are actually upside down. Your retinas change the image into signals that travel along your optic nerves to your brain. Your brain sees the picture rightside up.Rate this question:
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- 20.
Materials that block like wood, metal and people are all opaque. Transparent materials let light pass through them like glass and water. Translucent materials reflect some light and let the rest pass through. Cloudy looking plastics are translucent.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Opaque materials, such as wood, metal, and people, block light and do not allow it to pass through. On the other hand, transparent materials like glass and water allow light to pass through them without obstruction. Translucent materials fall in between opaque and transparent materials as they reflect some light and let the rest pass through. Cloudy looking plastics are examples of translucent materials. Therefore, the statement that "Materials that block like wood, metal, and people are all opaque. Transparent materials let light pass through them like glass and water. Translucent materials reflect some light and let the rest pass through. Cloudy looking plastics are translucent" is true.Rate this question:
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- 21.
Tick all the TRUE statements.
- A.
The moon does not emit light
- B.
The sun reflects light
- C.
Stars emit light
- D.
Humans do not emit visible light
Correct Answer(s)
A. The moon does not emit light
C. Stars emit lightExplanation
'Emit' means put out or produce lightRate this question:
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- 22.
Which one describes WAVELENGTH?
- A.
The distance a light ray travels each second
- B.
The distance between the crest of a wave and the trough (lowest point)
- C.
The distance between Earth and the sun
- D.
The distance between two crests right next to each other in a wave
Correct Answer
D. The distance between two crests right next to each other in a waveExplanation
The correct answer is "the distance between two crests right next to each other in a wave." This description accurately defines wavelength, which is the measurement of the distance between two consecutive crests or troughs in a wave. It represents the length of one complete wave cycle and is commonly used to characterize various types of waves, including light waves, sound waves, and electromagnetic waves.Rate this question:
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- 23.
Which is the definition of light?
- A.
The movement of air particles hitting your eardrum
- B.
A force that all objects with mass have
- C.
A type of energy (electromagnetic) that we can detect with our retina
- D.
What all matter is made up of
Correct Answer
C. A type of energy (electromagnetic) that we can detect with our retinaExplanation
Light is defined as a type of energy (electromagnetic) that we can detect with our retina. It is a form of electromagnetic radiation that is visible to the human eye. Light travels in waves and can be perceived as different colors depending on its wavelength. Our eyes are able to detect these wavelengths and convert them into visual information, allowing us to see the world around us.Rate this question:
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- 24.
Humans can see all wavelengths of light.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
NO: visible light is a very small part of the electromagnetic spectrum (possible wavelengths)Rate this question:
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- 25.
Which is TRUE?
- A.
Light with a shorter wavelength has MORE energy than longer wavelengths
- B.
Light with a shorter wavelength has LESS energy than longer wavelengths
Correct Answer
A. Light with a shorter wavelength has MORE energy than longer wavelengthsExplanation
Because it takes more energy for the photon to move up and down more often (shorter wavelength/greater frequency)Rate this question:
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- 26.
The colors of the rainbow are red, orange, yellow, green, blue, ___________, and violet.
Correct Answer
indigoExplanation
The colors of the rainbow are traditionally listed as red, orange, yellow, green, blue, indigo, and violet. Indigo is included in this list because it represents a distinct color between blue and violet. Although the distinction between blue and indigo may be subtle, it is commonly accepted in the context of the rainbow's color spectrum.Rate this question:
- 27.
What color will a BLUE dress look under a RED light?
- A.
White
- B.
Black
- C.
Red
- D.
Blue
Correct Answer
B. BlackExplanation
Only red light is hitting the object: this is all absorbed by a blue dress.Rate this question:
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- 28.
What color will a green dress look under blue lights?
- A.
Blue
- B.
White
- C.
Green
- D.
Grey
Correct Answer
A. BlueExplanation
green dresses usually contain blue and yellow and green dyes. Only blue will be reflected back to our eyes if blue light is shone on the dress.Rate this question:
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- 29.
Which one will REFLECT ALL the light that hits it?
- A.
A mirror
- B.
The sun
- C.
Stars
- D.
A red dress
Correct Answer
A. A mirrorExplanation
A red dress can only reflect red light; the mirror can reflect any wavelength shone onto it.Rate this question:
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