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WorksheetsLight, shadow & reflection
Total questions: 39
Worksheet time: 20mins
A glowing LED bulb and a ringing bell are kept in a vaccum jar. A person looking at the jar will
see the bulb glowing and hear the bell ringing
hear the bell ringing but will not see the bulb glowing
see the bulb glowing but will not hear the bell ringing
neither see the glowing bulb nor hear the ringing bell
What would be the colour of the shadow of a green ball?
Black
green
Blue
None of these
You will see the shortest shadow of yourself in sunlight .......
in the morning
in the evening
at noon
in the night
Which of the following is not always necessary to observe a shadow?
sun
source of light
screen
opaque object
Ahmed observed the shadow of a tree at 8:00 am, 12:00 noon and 3:00 pm. Which of the following statements is closest to his observation about the shape and size of the shadow?
the shape of the shadow of the tree changes but the size remains the same
the size of the shadow of the tree changes but the shape remains the same
Both the size and shape of the shadow of the tree change
Neither the shape nor the size of the shadow changes
Opaque material
objects that emit light of their own
a material that allows most of the light to pass through it
a material that allows only a part of light to pass through it
a material that does not allow any light to pass through it
A patch of light is observed at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
A wooden board
A glass sheet
A mirror
A sheet of white papers.
Look at the figure. What difference can be seen in the shadow formed on the screen in A and B ?
shadow of A will be round
shadow of B will be round
Shadow of A will be bigger than shadow of B
both will form the same type of shadow
Lunar eclipse
shadow cast by the moon on the earth
shadow cast by the moon on the sun
shadow cast by the earth on the moon
shadow cast by the earth on the sun
Solar eclipse
shadow cast by the moon on the earth
shadow cast by the moon on the sun
shadow cast by the earth on the moon
shadow cast by the earth on the sun
Which of the following can never form a circular shadow?
A ball
A shoe box
A flat disc
An ice cream cone
Which of the following will stop all light from passing through it?
A. shoe
B. pencil
C. cardboard
D. piece of thin cloth
A,B and C
B,C and D
A,C and D
A,B and D
we can see the moon because it ...................
absorbs light
gives out light
reflects light
does not have a shadow
A student observes a tree given in above figure through a pin hole camera. Which of the diagrams (a) to (d), depicts the image seen by her correctly?
Four students A, B, C and D looked through pipes of different shapes to see a candle flame as shown in figure given below. Through whose pipe the light will be visible ?
A
B
C
D
A magnet comes to a rest in _________________ direction when freely suspended.
north-south
south-east
north-west
south-west
A magnet can attract magnetic materials like ___________ and ____________.
copper and aluminium
steel and silver
iron and steel
iron and aluminium
What will happen when these magnets are brought close together?
They will repel each other.
They will attract each other.
Both magnets will turn to the left
Both magnets will turn to the right
What happens when two bar magnets repel each other?
The poles of the magnets pull toward each other.
The centers of the magnets pull toward each other.
The centers of the magnets push away from each other.
The poles of the magnets push away from each other.
When two magnets attract, they ______________
push apart
change color
get colder
pull together
What will happen when these magnets are brought near each other?
They will repel each other.
They will attract each other.
They will stay at the same position.
What would we call a nail that can pick up a paperclip because it is touching a magnet?
force
detector
poles
temporary magnet
The space around a magnet where the force of a magnet can attract best is called__________
horseshoe magnet
magnetic field
magnetism
bar magnet
Amy used a magnet to hold one piece of paper on the refrigerator. Later, she tried to use the same magnet to hold a stack of four pieces of paper, and the magnet wouldn't stick to the fridge. Why did this happen?
The magnet needs glue
The magnet couldn't hold due to the thickness of the paper
Paper repels magnets
A magnet isn't attracted to the refrigerator.
Which statement is true?
All magnets can attract large objects
All Magnets have the Same shape and Size
Magnets can not pull through Solids.
All Magnets have a North and a South Pole
Earth's magnetic South Pole is near Earth's geographic North Pole
True
False
An electromagnet is a magnet that
its strength can be varied and turned on and off
always has a magnetic field around it
has very little strength
What TWO ways are electromagnets different from permanent magnets?
they can be turned off and on
they can increase in strength by increasing the current in the wire
they are smaller in size
they are permanant
Permanent Magnets and Electromagnets are similar in which TWO ways?
it can be turned off and on
they both have a north and south pole
they are surrounded by a magnetic field
A compass needle shows us the magnetic field of
the sun
the moon
Earth
a magnet that is near by
Observe the pictures A and B given below carefully. Which of the following statements is correct for the above given pictures ?
In A, cars 1 and 3 will come closer and in B, cars 2 and 4 will come closer.
In A, cars 1 and 3 will move away from each other and in B, cars 2 and 4 will move away.
In A, cars 1 and 3 will move away and in B, 2 and 4 will come closer to each other
In A, cars 1 and 3 will come closer to each other and in B, 2 and 4 will move away from each other
Opaque material
objects that emit light of their own
a material that does not allow any light to pass through it
a material that allows only a part of light to pass through it
a material that allows most of the light to pass through it
The arrangements to store two magnets is shown by figures (a), (b), (c) and (d). which one of them is the correct arrangement?
A
B
C
D
which one of the given option is an unique property of an image ?
A screen or surface is required to form
Irrespective of the colour of the object, it is always black
It will shows all the details of an object, including its colour.
It always show the outline or the shape of the object and not the details.
Three magnets A, B and C were dipped one by one in a heap of iron filings. The figures below show the amount of the iron filing sticking to them. The strength of these magnets will be
A > B > C
A < B < C
A = B = C
A < B > C
Two ring magnets A and B are put through a rod as shown. Why is magnet A suspended over magnet B?
The unlike poles of the magnets face each other
The like poles of the magnets face each other
The rod is made of a magnetic material
Magnet X is lighter than magnet Y
fastest thing
cheetah
sound
revolution of earth
light
Magnetite
each of the two points of a magnet where the magnetic strength is maximum
a rock made of iron oxide that has magnetic properties
the force exerted by a magnet on magnetic materials in its magnetic field
to lose magnetism and magnetic properties
Khalid set up an experiment as shown in the diagram here. Which of the following will make the shadow of the object bigger ?
a. The object is moved closer to the screen
b. The torch is moved closer to the object
c. The object is moved further away from the screen
a and b only
b and c only
a and c only
all of the above
