Light: Properties, Reflection, Refraction, and Optics for Year 4 Science

Question 1

Which material lets light pass through but makes it hard to see objects clearly?

Accepted Answer

Translucent

Answer

Transparent

Answer

Opaque

Answer

Reflective

Question 2

When you look through glass, you can see things clearly. What property does this show?

Accepted Answer

Transparency

Answer

Translucency

Answer

Opacity

Answer

Shininess

Question 3

Which material does not allow light to pass through it?

Accepted Answer

Wood

Answer

Glass

Answer

Wax paper

Answer

Water

Question 4

Which material allows light to pass through clearly, so you can see through it?

Accepted Answer

Glass

Answer

Wood

Answer

Cardboard

Answer

Paper

Question 5

Which material lets light travel through it without being blocked?

Accepted Answer

Glass

Answer

Wood

Answer

Paper

Answer

Metal

Question 6

Which material allows you to see through it most clearly?

Accepted Answer

Glass window

Answer

Wooden door

Answer

Paper

Answer

Metal spoon

Question 7

When light bounces off a shiny surface, what is this called?

Accepted Answer

Reflection

Answer

Absorption

Answer

Refraction

Answer

Transmission

Question 8

Imagine you have a box with different objects inside. You want to see what's inside without opening the box. Which material would let you do this?

Accepted Answer

Clear plastic wrap

Answer

Cardboard

Answer

Wax paper

Answer

Aluminum foil

Question 9

When light hits an object, what can happen to it?

Accepted Answer

It passes through the object.

Accepted Answer

It bounces off the object.

Accepted Answer

It is absorbed by the object.

Answer

It changes color.

Question 10

Where does the light that we see from the moon come from?

Accepted Answer

The moon reflects light from the sun.

Answer

The moon creates its own light.

Answer

The moon reflects light from the stars.

Answer

The moon does not give off any light.

Question 11

Which material blocks light from passing through it?

Accepted Answer

Cardboard

Answer

Glass

Answer

Wax paper

Answer

Tissue paper

Question 12

Which of these is NOT a natural source of light?

Accepted Answer

A flashlight

Answer

The Sun

Answer

A fire

Answer

A candle

Question 13

Which material allows us to see objects clearly when light passes through it?

Accepted Answer

Clear glass

Answer

Wood

Answer

Frosted glass

Answer

Paper

Question 14

Which material allows light to pass through it most clearly?

Accepted Answer

Glass

Answer

Wood

Answer

Paper

Answer

Metal

Question 15

What is a natural source of light?

Accepted Answer

The sun

Answer

A torch

Answer

A lamp

Question 16

Which of these materials lets light pass through it so you can see clearly through it?

Accepted Answer

Glass

Answer

Cardboard

Answer

Frosted glass

Question 17

You're building a toy house and want to add a window. Which material would let light in but make it hard to see the toys inside?

Accepted Answer

Frosted glass

Answer

Glass

Answer

Cardboard

Answer

Mirror

Question 18

When sunlight shines through a window, which material allows the most light to pass through?

Accepted Answer

Glass

Answer

Wood

Answer

Paper

Answer

Metal

Question 19

Which material lets light pass through it?

Accepted Answer

Glass

Answer

Cardboard

Answer

Metal sheet

Question 20

Which of these does NOT produce light?

Accepted Answer

A mirror

Answer

The sun

Answer

A torch

Answer

A candle

Question 21

When you shine a torch at an object, what type of material stops the light from passing through it?

Accepted Answer

Opaque

Answer

Transparent

Answer

Translucent

Question 22

Which object allows the most light to pass through it?

Accepted Answer

A glass window

Answer

A piece of wood

Answer

A sheet of paper

Answer

A metal spoon

Question 23

Which material allows the most light to pass through it?

Accepted Answer

Glass

Answer

Cardboard

Answer

Paper

Question 24

Which of these is NOT a natural source of light?

Accepted Answer

A torch

Answer

The sun

Answer

A campfire

Answer

A lightning strike

Question 25

What is formed when an object blocks light from reaching our eyes?

Accepted Answer

A shadow

Answer

A reflection

Answer

A rainbow

Answer

A mirage

Question 26

Which material blocks light from passing through?

Accepted Answer

Cardboard

Answer

Glass

Answer

Plastic wrap

Answer

Water

Question 27

What happens when a beam of light hits a shiny surface like a mirror?

Accepted Answer

The light bounces off the mirror.

Answer

The light is absorbed by the mirror.

Answer

The light goes through the mirror.

Answer

The light changes direction as it passes through the mirror.

Question 28

Which material would allow the most light to pass through?

Accepted Answer

Clear glass

Answer

Thick cardboard

Answer

Frosted glass

Question 29

Which of these is NOT a natural source of light?

Accepted Answer

A torch

Answer

The Sun

Answer

A campfire

Answer

A lightning flash

Question 30

When light moves from one material to another with a different density, it changes direction. What is this effect called?

Accepted Answer

Refraction

Answer

Diffraction

Answer

Reflection

Question 31

Which material allows light to pass through clearly, without making it blurry?

Accepted Answer

Glass

Answer

Cardboard

Answer

Oiled paper

Question 32

Which material allows light to pass through it, letting you see clearly on the other side?

Accepted Answer

Transparent material

Answer

Opaque material

Answer

Translucent material

Answer

Reflective material

Question 33

When you stand in sunlight, why does a shadow of your body appear on the ground?

Accepted Answer

Light being blocked by your body

Answer

Light bouncing off your body

Answer

Light going through your body

Question 34

Which material lets light pass through it completely?

Accepted Answer

Transparent

Answer

Opaque

Answer

Translucent

Answer

Reflective

Question 35

When light passes through a material and you can clearly see the shape of an object on the other side, what does this tell you about the material?

Accepted Answer

The material is transparent.

Answer

The material is opaque.

Answer

The material is translucent.

Question 36

Which material blocks light from passing through it?

Accepted Answer

Cardboard

Answer

Clear glass

Answer

Wax paper

Question 37

Which material allows you to see objects behind it clearly, as if there was nothing there?

Accepted Answer

Glass

Answer

Cardboard

Answer

Wood

Question 38

Which material lets us see through it without any blur?

Accepted Answer

Glass

Answer

Wood

Answer

Paper

Answer

Metal

Question 39

Which of these is NOT a natural source of light?

Accepted Answer

A light bulb

Answer

The Sun

Answer

A fire

Question 40

Which material allows light to pass through it clearly, so you can see through it?

Accepted Answer

Glass

Answer

Wood

Answer

Paper

Answer

Metal

Question 41

Which material lets light pass through it easily, so we can see things on the other side?

Accepted Answer

Clear plastic

Answer

Wood

Answer

Metal

Question 42

Which material allows some light to pass through, but not enough to see clearly through it?

Accepted Answer

Translucent

Answer

Transparent

Answer

Opaque

Answer

Reflective

Question 43

Which material lets the most light pass through, so you can see clearly?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Answer

Fabric

Question 44

Which material will make light bend as it passes through?

Accepted Answer

Clear water

Answer

Thick cardboard

Answer

Shiny metal

Question 45

What is an example of an artificial light source?

Accepted Answer

Flashlight

Answer

Fire

Question 46

When light hits a surface, how does the angle it hits the surface affect the way it bounces off?

Accepted Answer

The angle it bounces off is always the same as the angle it hits the surface.

Answer

The angle it bounces off is always bigger than the angle it hits the surface.

Answer

The angle it bounces off is always smaller than the angle it hits the surface.

Answer

The angle it bounces off is not related to the angle it hits the surface.

Question 47

When light hits an object, it can bounce off (reflect), be taken in (absorbed), or pass through (transmitted). Which of these materials lets the most light pass through it?

Accepted Answer

Glass

Answer

Metal

Answer

Wood

Answer

Paper

Question 48

Light behaves like a wave. What happens when light passes through a narrow gap or around an object? How can we see the effects of this in real life?

Accepted Answer

Diffraction is the spreading of light around the edges of an obstacle, and interference is the bending of light as it passes through two closely spaced slits.

Answer

Diffraction is the bending of light as it passes through a narrow opening, and interference is the reflection of light off a surface.

Answer

Diffraction is the reflection of light off a surface, and interference is the absorption of light by an object.

Answer

Diffraction and interference are both related to the particle nature of light.

Question 49

How did measuring the speed of light help scientists understand more about the universe?

Accepted Answer

It allowed scientists to calculate the distance to stars and galaxies.

Answer

It showed that light travels in waves.

Answer

It explained how rainbows are formed.

Question 50

Which of these is NOT a property of light?

Accepted Answer

It makes shadows appear.

Answer

It travels in straight lines.

Answer

It can bounce off surfaces (reflect).

Answer

It can be absorbed by objects.

Question 51

What happens when light hits a mirror?

Accepted Answer

It bounces off (reflects).

Answer

It gets absorbed.

Answer

It bends (refracts).

Answer

It scatters.

Question 52

Why can we see objects that don't glow?

Accepted Answer

They bounce light back to our eyes (reflect).

Answer

They make their own light.

Answer

They soak up light (absorb).

Answer

They bend light (refract).

Question 53

Which of these materials lets light pass through it the easiest?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Answer

Cloth

Question 54

What makes a rainbow appear?

Accepted Answer

Light bending (refracting).

Answer

Light bouncing off (reflecting).

Answer

Light spreading out (diffracting).

Answer

Light getting soaked up (absorbing).

Question 55

What is the difference between a round lens (convex) and a curved lens (concave)?

Accepted Answer

Convex lenses make light come together, while concave lenses spread it out.

Answer

Convex lenses spread light out, while concave lenses make it come together.

Answer

Convex lenses are thicker in the middle, while concave lenses are thinner in the middle.

Answer

Convex lenses help with nearsightedness, while concave lenses help with farsightedness.

Question 56

What does a prism do?

Accepted Answer

It bends light.

Answer

It bounces light off (reflects).

Answer

It soaks up light (absorbs).

Answer

It scatters light.

Question 57

Why do we see shadows?

Accepted Answer

Light is blocked by an object.

Answer

Light bounces off (reflects) an object.

Answer

Light bends (refracts) around an object.

Answer

Light gets soaked up (absorbed) by an object.

Question 58

When light travels from air into water, which of these happens?

Accepted Answer

It bends towards the normal

Answer

It bends away from the normal

Answer

It travels in a straight line

Answer

It slows down

Question 59

Which material reflects light the most?

Accepted Answer

Metal

Answer

Wood

Answer

Glass

Answer

Paper

Question 60

Which color of light has the longest wavelength?

Accepted Answer

Red

Answer

Orange

Answer

Yellow

Answer

Green

Question 61

Which part of the eye can detect light?

Accepted Answer

Retina

Answer

Cornea

Answer

Lens

Answer

Iris

Question 62

What happens when white light goes through a prism?

Accepted Answer

It bends and splits into different colors

Answer

It reflects and bounces back

Answer

It speeds up and travels in a straight line

Answer

It absorbs and disappears

Question 63

What is the name of the angle between the incident ray and the normal?

Accepted Answer

Angle of incidence

Answer

Angle of reflection

Answer

Angle of refraction

Answer

Angle of divergence

Question 64

Which of these materials is transparent?

Accepted Answer

Glass

Answer

Cardboard

Answer

Wood

Answer

Brick