Tutorial World Primary 3
 
Name:_________________________ Date:_______________
 

Light (8.1)

A. Write the number of the correct answer in the brackets.
1. An object which gives off light is called a ________. ()
(1)
(2)
(3)
(4)

 
lamp
reflector
light source
power
2. In order for us to see an object, the object must be able to ________ light. ()
(1)
(2)
(3)
(4)

 
absorb
transmit
block out
reflect
3. We can see through glass because it ________. ()
(1)
(2)
(3)
(4)

 
allows light to pass through
blocks out all the light
absorbs all the light
is made of clear material
4. Which of the following is translucent? ()
(1)
(2)
(3)
(4)

 
Wood
Tracing paper
Cardboard
Mirror
5. We can see an opague object like a brick wall because it ________ the light which falls on it. ()
(1)
(2)
(3)
(4)

 

absorbs
transmits
blocks out
reflects
B. Write "T" for true and "F" for false.
1. When there is no light source, we cannot see the things around us.
 
()
2. We see many things around us because these things give off light on their own.
 
()
3. We see the stars twinkling in the sky because they reflect light from the Sun.
 
()
4. The Sun is a natural light source.
 
()
5. Light paths do not bend around a corner on their own.

 

()
C. Fill in the blanks with the most suitable word.
1. We use a _______________ to look at ourselves because it is a good reflector of light.
 
2. Objects that are bright-looking reflect _______________ light to our eyes than those which are dark-looking.
 
3. Light is a form of _______________.
 
4. When the reflected light is scattered in all directions, it is called _______________ reflection.
 
5. Light travels in _______________ lines.

 

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