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Class 7 Science
Light: Shadows and Reflections Chapter 11 Quiz 1
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Which of the following does not have light of its own?
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a torch
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a lamp
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the moon
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the sun
When the Sun is behind you, your shadow is ...
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behind you
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in front of you
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at the side of you
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not there
12.Translucent is?
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When light bounces off an object
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Material that only allows a little light to pass through
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Our main source of light
Opaque is?
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Material that allows light to pass through
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Light made by nature
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Material that allows no light to pass through
What is the main source of light?
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sun
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trees
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moon
When an object moves closer to a light source, its shadow...
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Gets smaller
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Gets bigger
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Changes shape
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Stays the same size
Why do shadows made by the Sun move throughout the day?
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Because the weather changes
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Because someone moves the objects
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Because the sun appears to move across the sky
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Because it's magic!
Shadows are longest during _______.
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morning and evening
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noon
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night
Where will the tree's shadow be?
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A
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B
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C
Which is NOT a source of light?
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firefly
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ball
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sun
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falshlight
Which source of light is natural?
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firworks
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lightbulb
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lightning
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headlights
Light travels in..
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waves
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circles
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a straight line
We can see things around us because of light reflecting off the object and into our eyes?
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True
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False
Which will make the darkest shadow? Light shining on a...
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sheet of thin tissue paper
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glass window
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wooden chopping board
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none of the above
What does reflection mean?
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Light bouncing off an object.
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Light is bending around an object.
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Light is moving through and object.
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This is no light.
Which colours reflect more light?
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Bright colours
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Dark colours
Why does the cat form a shadow?
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It reflects light
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It blocks light
What is the best explanation for Mickey seeing himself in the mirror?
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refraction
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absorbed
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reflection
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flipped
There is light on the Earth even on a dark, cloudy day. This is because clouds are:
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Opaque
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Transparent
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Translucent
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Luminous
What is a Luminous object?
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if we cannot see through the object it is called luminous object
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if we can see the object but not clearly it is called luminous object
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if a object emits light of its own it is called luminous object
What is a Shadow?
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It is a reflection of an object
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It is a dark patch
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It is a dark area where light is blocked by a opaque object
How does light pass
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in a pattern
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in a circle
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in a straight line
What is a Reflection?
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A image produced by a object Example: water
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A image produced by a luminous object Example: Sun
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A image produced by a opaque object Example: orange
What is a Opaque object?
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Object that do not let light pass though are called opaque objects
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Objects that let light pass though is called opaque objects
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Objects which we can see but not very clearly
What is a pinhole camera?
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A pinhole camera is in the shape of a box.
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A pinhole camera is a camera with lens
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A pinhole camera is a simple camera, without lens, in the shape of a box.
Can a rock be classified as a luminous object?
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True
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False
If we stand in a completely dark room, will we be able to see a reflection in a mirror?
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Yes
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No
Can we say that a pinhole camera is a translucent object?
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No
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Yes
We can say that the sun is a luminous object
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No
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Yes
How do we see objects?
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We see objects when light reflects off it
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We see objects wen the light is off
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We cannot see objects when there is light
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