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Light, Shadows And Reflections - Important Questions Model Paper In 6th Science

Published on: 02/08/2018

From the chapter Light, Shadows and Reflections, some of the important questions are covered in this question paper. The questions are covers from the Higher Order Thinking Questions and Value Based Questions.

Download CBSE Class 6th Standard CBSE Science question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 6th Standard CBSE Science

Questions + Answers key

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Std: 6th Standard CBSE - Science

chapter: - Model Question paper

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Questions:

Generic 2

5 x 2 = 10

Name the things other than source of light and opaque object required to see the shadow.

In respect to the direction of source of light, what is the direction of shadow?

Briefly state that what a dark part of shadow is called as.

Through which pipe, we can see the candle, straight pipe or curved pipe?

Mention the name of an object which partially allows the light to pass through it.

Generic 3

5 x 3 = 15

Three torches A, Band C shown in figure are switched ON one by one. The light from which of the torches will not form a shadow of the ball on the screen?

Differentiate between a luminous and non-luminous objects.

Suggest any two means for the conversion of a transparent glass sheet into a translucent sheet.

A student covered a torch with red cellophane sheet to obtain red light. Using the red light, she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain.

10.

Three identical towels of red, blue and green colour are hanging on a cloth line in the sun. What would be the colour of shadows of these towels?

True or False

5 x 1 = 5

11.

Images are similar to shadows.

(a)

True

(b)

False

12.

Lateral inversion is a phenomenon of changing left to right and vice-versa.

(a)

False

(b)

True

13.

Mirror does not change the direction of light falls

(a)

True

(b)

False

14.

Light is not a form of energy.

(a)

True

(b)

False

15.

Moon is luminous.

(a)

True

(b)

False

Fill up / 1 Marks

5 x 1 = 5

16.

Light helps us to__________________objects.

17.

Shadows are______________ from images.

18.

Reflection of mirror gives us_____________images.

19.

Shadows are formed by _________________object.

20.

Pinhole camera forms_____________ image.

Multiple Choice Question

5 x 1 = 5

21.

Shadow of an object is always seen in

(a)

blue

(b)

black

(c)

red

(d)

None of these

22.

The objects which partially allow the light to pass through it are called

(a)

transparent

(b)

luminous

(c)

opaque

(d)

tanslucent

23.

Which one of the following is the natural source of light?

(a)

Sun

(b)

Tubelight

(c)

Electric bulb

(d)

None of these

24.

Which of the following is a transparent object?

(a)

Glass shut

(b)

Pencil

(c)

Chair

(d)

Table

25.

Two students while sitting across a table looked down onto its top surface. They noticed that they could see their own and each other's image. The table top is likely to be made of

(a)

unpolished wood

(b)

red stone

(c)

glass sheet

(d)

wood top covered with cloth

Generic 5

2 x 5 = 10

26.

A football match is being played at night in a stadium with flood lights ON. You can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. Explain.

27.

A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes,1he shadow was not obtained. Explain.

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Answers Key:

Generic 2

5 x 2 = 10

A screen like cardboard, wall and ground is required to see the shadow.

In respect to the direction of source of light, the direction of shadow is always opposite to it.

Limbra is called the dark part of shadow.

As the light travels in a straight line path, so we can see the candle through a straight pipe.

The object which partially allows the light to pass through it is a translucent Object, e.g. wax paper.

Generic 3

5 x 3 = 15

The light from the torch C will not form a shadow on the screen because light travels in a straight path and will form the shadow on the same path from which it is coming.

Luminous objects are those objects which emit the light of their own e.g. the stars, the sun, burning candle, etc. While non-luminous objects are those objects which do not emit light of their own, e.g. Blackboard, moon, earth, etc.

The two ways through which a transparent glass sheet can be converted into a translucent sheet are
(i) If one side of butter paper gets covered, then a transparent glass sheet turns into a translucent one.
(ii) By smearing a thin layer of oil.

Shadow is just an absence of light at that place. Shadow is not affected by the colours of the object because the amount of light is preventing to pass, will remain same. The shadow is affected by the shape of the object only. If the object is large, the shadow will be large and vice-versa.

10.

Shadow does not change on changing the colour. Shadow will always show the absence of light at that place. So, the shadow colour will remain same in all the cases. Thus, the shadow of all the towels are black in colour.

True or False

5 x 1 = 5

11.

(b)
False

12.

(a)
False

13.

(b)
False

14.

(b)
False

15.

(b)
False

Fill up / 1 Marks

5 x 1 = 5

16.

()
see

17.

()
different

18.

()
clear

19.

()
opaque

20.

()
inverted

Multiple Choice Question

5 x 1 = 5

21.

(b)
black

22.

(d)
tanslucent

23.

(a)
Sun

24.

(a)
Glass shut

25.

Generic 5

2 x 5 = 10

26.

The shadow of the object cannot be caught if the screen and the object are very far from each other. This is the same case, the shadow of the football cannot be seen on the ground when it is kicked high in the air. This happens because if we take the object away and away from the screen, the image becomes smaller and smaller and a time comes when it disappears from the screen.

27.

Sometimes, the shadow of the object (ball) may not be formed because of improper arrangement. It may be that the direction of the torchlight is not towards the screen. The shadow will be formed only if screen, torch and ball are in the same straight line (as shown in figure).