SARDAR DOON PUBLIC SCHOOL, JODHPUR
SUMMER HOLIDAY HOME WORK
2017-18
SUBJECT: SCIENCE
Class VIII
Instructions:
i.
You are requested to download and take a print of all the pages of this assignment.
ii.
Activity and articles are to be written on an A4 size sheet. Write your name, class and section on each
sheet.
iii.
All the questions of the Worksheet need to be answered in the worksheet itself.
iv.
Write your Name and Section on the worksheet as well as the A4 size sheet used to write activity and the
articles.
v.
Compile all the A4 size sheets used to answer question 1 and 2. Attach the cover page along with the
compiled sheets before submitting the same. For your convenience the cover page is provided along with
this assignment.
vi.
The assignment should be submitted to the Science Teacher when the school reopens.
1. Make a Kaleidoscope or Periscope and write the procedure under mentioned following
points. You can use your text book ‘Living Science’ or take help of internet under parent
supervision. Use A4 size sheet to write the procedure.
a. Aim
b. Requirements
c. Principle
d. Procedure
e. Conclusion
2. Write an article on “India’s Mission on Mars (MOM)” in about 300 words. You can
take help of internet under parent supervision. Use A4 size sheet to write the article.
3. Write brief description of each of the following scientists with their contributions and
achievements (in about 250 – 300 words) on A4 size sheet.
a. Vikram Sarabhai
b. Dr. A. P. J. Abdul Kalam
4. Worksheet on ‘LIGHT’ is attached herewith. You are requested to answer the questions
in the printed worksheet itself.
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SARDAR DOON PUBLIC SCHOOL
JODHPUR
SUMMER HOLIDAY ASSIGNMENT
SUBJECT: SCIENCE
Student’s Name: ______________________________________
Class:
VIII
Section: __________________
2017-2018
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SARDAR DOON PUBLIC SCHOOL, JODHPUR
SUMMER HOLIDAY HOME WORK
2017-18
SUBJECT: SCIENCE
Name: _____________________
Class: VIII Section: ______
LIGHT
1. Multiple choice question:
a. The process of sending back the light rays which fall on the surface of an object is
called_____________
(i) reflection
(ii) refraction
(iii) dispersion
(iv) diversion
b. The ray of light which is sent back after reflection by the mirror is
called_____________
(i) incident ray
(ii) reflected ray
(iii) normal
(iv) light ray
c. If the angle of incidence is 300, the angle of reflection is_____________
(i) 600
(ii) 300
(iii) 150
(iv) 130
d. If the angle between the plane mirror and the incidence ray is 200, angle of reflection
is_____
(i) 600
(ii) 300
(iii) 450
(iv) 700
e. Images are formed in case of _____________reflection.
(i) regular
(ii) irregular
(iii) smooth
(iv) diffused
f. If two plane mirrors are placed parallel to each other, we get__________
(i) 1 images
(ii) 2 images (iii) 3 images
(iv) infinite images
g. The beautiful patterns that we obtain in a kaleidoscope are because of _________ of
light
(i) spectrum
(ii) dispersion (iii) multiple reflection
(iv) refraction
2. Fill in the blanks
a. Travelling of light in straight line is called _________________ propagation of light.
b. The _______________ is a device that produces beautiful patterns when it is rotated.
c. The left -right reversal of object and its mirror image is called __________________.
d. Kaleidoscope is a device, based on the principle of _________________________.
e. The objects which do not emit light of their own are called__________________.
f. The angle of reflection is _______________ angle of incidence.
g. The angle between the incidence ray and the normal is called the angle of
___________________.
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3. Circle the odd one.
4.
a. Diffused
regular
irregular
smooth
b. Incident
ray
reflected
refracted
c. Mirror
glass
steel
Match the column A with column B
Column A
a. Bouncing of light
b. Upright
c. Lateral inversion
d. Perpendicular to the mirror surface
Column B
i. normal
ii. left-right reversal
iii. reflection
iv. erect image
5. Look at the given figure and answer the following questions
a. Label the Incident ray, the Reflected ray and the Normal with appropriate arrows in
the above given diagram.
b. State the relation between angle of incidence and angle of reflection and label these
angles in the given figure.
_____________________________________________________________________
c. The angle of incidence formed at three points, consecutively on a plane mirror is 300,
450, and 550. What will be the angle of reflection corresponding to these points
respectively?
i. ______________ ii. _______________ iii. ___________________
d. If the surface is not a plane, will the law of reflection be applicable for the surface?
Justify your answer with a reason?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
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6. Let us recall what we have studied in this chapter. Using your knowledge about light
complete the concept map given below.
LIGHT
LAWS OF
REFLECTION
CHARACTERISTICS OF THE
IMAGE FORMED BY THE
PLANE MIRROR
i.________________
First Law of Reflection:
_________________
________________________
_________________
________________________
ii._______________
_________________
_________________
_________________
________________________
_________________
_________________
_________________
_________________
iii._______________
________________________
_________________
_________________
_________________
_________________
____________________________
_________________
_________________
iv._______________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
________
v._______________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
_________
_________________
_________________
_________________
_________________
________________________
________________________
______________
Second Law of Reflection:
_________________________
_________________________
_________________________
_________________________
_________________________
_________________________
_________________________
_________________________
_________________________
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