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WorksheetsUnit 21:Light and Heat
Total questions: 20
Worksheet time: 26mins
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 type of material is this : 'Materials only let some light pass through them'
Transparent
Opaque
Transformation
Translucent
Why does the straw appear to be bent?
light is reflected
light is absorbed
light is turned
light is refracted
What do we call a material that light can travel through?
air
water
medium
pathway
The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of
Convection
Conduction
Radiation
insulation.
A pot is placed directly on a stove. The pot gets hot due to
conduction
convection
radiation
Near the ceiling of a room the air is warmer. The warm air rises because of
conduction
convection
radiation
The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?
radiation
conduction
convection
insulation
What can you use to see all the different colors in white light?
A flashlight
A shadow
A camera
A prism
How many components of white light?
5
6
7
8
When we look through a lens, we observe that the image of an object gets distorted because _________________.
light undergoes refraction.
light undergoes reflection.
light of different colours travel at different speeds.
light disappear.
Light travels in a _________ ______________.
(a)
Red light travels the fastest so, it __________________.
refracts the most
refracts the least
doesn't refract.
it refracts the slowest.
Dispersion occurs because light of different colours travel at different speeds.
True
False
Light bends because it changes its s (a) as it enters another medium.
