General Science Class 8 - PDF Book
Sindh Text Book Board
Table of Contents
1 Human Organ System (1)
2 Heredity in Organisms (19)
3 Biotechnology (32)
4 Pollutants and Their Effects on Environment (42)
5 Chemical Reactions (53)
6 Acids, Alkalis, and Salts (68)
Force and Pressure (82)
8 Measurement of Physical Quantities (105)
9 Sources and Effects of Heat Energy (120)
10 Lenses (140)
11 Electricity in Action (157)
12 Exploring Space (173)
Preface
t is a matter of great pleasure and satisfaction for me to iterate that the Sindh Textbook
Board has been providing the students of the entire Sindh province, with textbooks of
worthy standard from the point of its inception, till now. On one hand, these books are
quite affordable; on the other hand, their publication and availability is being managed in a
timely and efficient manner.
The main ideology behind these textbooks is that they must contain knowledgeable,
qualitative material in order to impart in our students, the skills that can help them
compete in today's ever changing and challenging world. The present global scenario
demands that first and foremost, our new generation must be well conversant with the
Islamic ideology; then it must possess an exemplary character, a high degree of patriotism,
and a sense of responsibility, brotherhood, fraternity and equality. The possession of al
these qualities will assist them in their studies in general. However, acquisition of these
skills is all the more important particularity in science teaching and learning, if the students
are to actively participate in new scientific research and inventions, and develop
awareness, soundness of mind and a progressive mind set.
Our students will be able to achieve success and economical stability and lead a prosperous
and successful life, only when they are able to master these skills. Along with these skills our
students will have to develop inquiry, communication, critical thinking and problem solving
skills for a bright future. Having a bright future, they will be able to ultimately hold the reins
of their country and provide it the much needed prosperity and economic soundness. They
will become model citizens of their country and nation in shape of learners, implementers
and innovators.
With objectives and intentions of such noble national spirit, the Sindh Textbook Board is
introducing this book of "scence Grade-8" for new entrants in the field of education. This
book has been written by well-experienced authors and reviewed by senior educationists in
accordance with the "New Curriculum 2006" for inclusion in thee syllabus. Thus, the Sindh
Textbook Board is quite hopeful that the teachers, students and other respective
stakeholders will benefit from this book.
Lastly, it is requested that in case there are any concrete recommendations(s)/suggestions
from your side with reference to the material contained in this book, feel free to convey
them to us, so that they can be incorporated in the subsequent edition.
The Chairman
The Sindh Textbook Board, Jamshoro.
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