CBSE Class 9 Science Solved Sample Paper for Annual Examination 2019
As the exams are fast approaching, most of the students would be searching for sample papers which can be used to test their preparedness for the exams. To ease their stress and provide them with a better source of exam preparation, we at Jagranjosh, are providing the CBSE sample paper for class 9 Science. This CBSE sample paper adheres to the CBSE Class 9 Science Syllabus and covers all the important chapters and topics of Class 9 Science NCERT Book from an exam perspective. We have also provided appropriate answers to all the questions given in this Sample Paper. These answers will help you understand the criteria about the word limit and inclusion of key concepts to write perfect solutions the exams and grab high scores.
CBSE class 9 Science Sample paper is the best way to practice your concepts and prepare better for the upcoming Annual Exams. Going through this sample paper, students will get an idea of real question paper pattern along with the marking scheme. It will help you in molding your preparation strategy to obtain high scores in exam.
Structure of CBSE Class 9 Science Solved Sample Paper 2019:
- Includes questions asked from the complete syllabus of CBSE class 9.
- Consists of 27 questions divided into five sections A, B, C, D and E.
- Question number 1 to 2 in Section-A are one mark questions
- Question number 3 to 5 in Section-B are two marks questions.
- Question number 6 to 15 in Section-C are three marks questions.
- Question number 16 to 21 in Section-D are 5 marks questions.
- Question number 22 to 27 in Section-E are based on practical skills. Each question is a two marks question.
- Total marks: 80
- Maximum time : 3 Hours
Some of the questions from CBSE Class 9 Science Solved Sample Paper 2019 are given below:
Q. “Every multicellular organism has arisen from a single cell.” Justify this statement.
Multicellular organisms are higher organisms which reproduce by sexual reproduction method in which there is fusion of gametes from two parents involved. This is called fertilisation that results in formation of a single cell called zygote which undergoes further division and differentiation to form a multicellular organism.
Q. (a) Name two properties of a substance to check its purity?
(b) Alloys cannot be separated by physical means, though it is considered mixture. Why?
(a) A pure substance has a fixed melting point or boiling point at constant pressure. The purity of a substance can be tested by checking its melting point or boiling point. If a substance is impure i.e. it contains traces of another substance, the melting and boiling point of that substance will change.
(b) Alloys are homogeneous mixtures of metals and cannot be separated into their components by physical methods. But still, an alloy is considered as a mixture because it shows the properties of its constituents and can have variable composition.
Q. (a) Name any one disease caused by bacteria and virus.
(b) Why are antibiotics effective against bacteria but not viruses?
(a) Disease caused by:
(i) Bacteria – Tuberculosis
(ii) Virus – AIDS (Acquired Immune Deficiency Syndrome)
(b) Antibiotics are effective against bacteria but not against virus because they perform their activities with the help of their own host cells while bacteria has a different mechanism. Bacteria have cell wall. Antibiotics act by blocking the biochemical pathways which are essential for the survival of the bacteria. They prevent cell wall formation which causes the bacteria to die, thereby preventing bacterial diseases.
Q. What do you mean by active and passive immunisation?
Active immunisation: It promotes the production of circulating antibodies against foreign antigens by injecting a small quantity of modified antigen into the bloodstream.
Passive immunisation: It is the application of antibodies from an immune individual to non- immune patient. This treatment is used when an individual has been or probably will be, exposed to an infectious disease and there is insufficient time for active immunisation.
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In order to get good marks in Science it’s quite important that students do a lot of practice of the concepts and theories learned in the subject. So, students must solve more and more Sample Papers and Practice Papers to write their exam well and score optimum marks.
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