Font size
WorksheetsLight and heat grade 4
Total questions: 31
Worksheet time: 2hrs 54mins
Which one of these is NOT a source of light?
a firefly
a book
the sun
a torch
There are _____ ways that heat can travel.
2
4
6
3
Convection is
The flow of energy through touch.
The flow of energy through heated liquids or gases.
The flow of energy through open space.
What is the definition of CONDUCTION?
When heat transfers from objects that are touching.
When heat transfers through the heater or AC in your house.
A source of heat gives off heat energy. Which heat source transfers heat energy in the form of radiation?
Each picture shows a source of heat. Which picture shows heat transfer through convection?
Why is there a need for a light over the greenhouse?
The lights keep the plants warm
The light cools the plants off
What is light?
A form of energy that lets us see heat
A form of energy that lets us see objects
A source of sunlight
A type of colour
Which object is the best reflector of light?
Paper
Mirror
Wood
Sand
What do we call this process: when light hits an object and bounces in another direction?
Refraction
Radiation
Reflection
Recyling
If you see something blue, that means that...
The object has reflected all the colors, except blue.
The object absorbs all the colors, except blue.
We can see the colors of light with a
Prism
Rainbow
CD
All of the above
What does REFLECTION mean?
It is when light bounces on a surface and goes back
It is when light passes through an object and bends
What is REFRACTION
It is when light passes through an object and bends
It is when light bounces on a surface and goes back
Which of these photos show REFLECTION?
Which of these photos show REFRACTION?
A mirror _________________ light.
absorbs
reflects
refracts
What does the pencil in this picture show about light?
Light is refracted when it hits a curved object.
Light is reflected when it hits a curved object.
Light is refracted when it passes from air into water.
Light is reflected when it passes from air into water.
To take in light means to
absorb it
reflect it
refract it
A prism does this to light...
reflects light
separates white light into different wavelengths
stops light from moving
