Properties Of Light: 9th Grade Science! Quiz

Usually, a source of light gives off white light. White light is actually made up of ____________ colors. These colors range from red to violet.

• One

• Five

• All

• Two

• No

All light is made of waves. A __________________________________ is the distance from the top of one wave to the top of the next wave.

• Wavelength

• Distance length

• Top point

• High top

• High point

High-energy waves have ___________________ wavelengths and low-energy waves have _______________ ones.

• Taller and shorter

• Shorter and longer

• Longer and faster

• Longer and shorter

• Shorter and taller

______________________ 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.

• Shadows

• Forests

• Houses

• Chairs

• Planets

Light travels in straight lines or ___________________. Shadows prove this. Light spreads out from a source in all directions, however it can't ____________________.

• Rays and bounce off

• Bend and rays

• Rays and eat

• Bounce off and rays

• Rays and bend

Shadow size depends on where the light source is. The closer an object is to a light source, the ________________ the shadow.

• Shorter

• Smaller

• Bigger

• Taller

• Skinnier

Most of the light that reaches your eyes is _____________________ light. Reflection occurs when light strikes a surface and __________________________ off.

• Bounced and refraction

• Reflected and bounces

• New and bounces

• Refraction and bounces

• Old and bounces

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. 

• Outward and forward

• Outgoing and incoming

• Forward and outward

• Incoming and outgoing

• Cat and dog

The Law of Reflection says that with reflection, the ______________________ angle is equal to the _____________________ angle.

• Shark and whale

• Oncoming and outgoing

• Forward and outward

• Outgoing and oncoming

• Outward and forward

Refraction is the _________________ of light as it ____________________ from one material to another.

• Bending and bounces

• Passing and bends

• Bouncing and bends

• Tree and grass

• Bending and passes

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.

• Reflect and opaque

• Translucent and reflect

• Reflect and transparent

• Opaque and reflect

• Reflect and translucent

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.

• Slower

• Faster

• More

• Less

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 _______________________.

• Convex and conrex

• Concave and concone

• Convex and concone

• Convex and concave

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.

• True

• False

When light reaches your eye it first passs through a thin, clear tissue overing each eye called the ________________________.

• Pupil

• Cornea

• Retina

• Optic nerves

Then light passes through an opening called the _____________________. It's the black spot in the center of your eye.

• Cornea

• Optic nerves

• Pupil

• Retina

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.

• Lens

• Cornea

• Optic nerves

• Pupil

• Retina

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.

• Optic nerves

• Retina

• Pupil

• Lens

• Cornea

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. 

• True

• False

Tick all the TRUE statements.

• The moon does not emit light

• The sun reflects light

• Stars emit light

• Humans do not emit visible light

Which one describes WAVELENGTH?

• The distance a light ray travels each second

• The distance between the crest of a wave and the trough (lowest point)

• The distance between Earth and the sun

• The distance between two crests right next to each other in a wave

Which is the definition of light?

• The movement of air particles hitting your eardrum

• A force that all objects with mass have

• A type of energy (electromagnetic) that we can detect with our retina

• What all matter is made up of

Humans can see all wavelengths of light.

• True

• False

Which is TRUE?

• Light with a shorter wavelength has MORE energy than longer wavelengths

• Light with a shorter wavelength has LESS energy than longer wavelengths

The colors of the rainbow are red, orange, yellow, green, blue, ___________, and violet.

What color will a BLUE dress look under a RED light?

• White

• Black

• Red

• Blue

What color will a green dress look under blue lights?

• Blue

• White

• Green

• Grey

Which one will REFLECT ALL the light that hits it?

• A mirror

• The sun

• Stars

• A red dress