Jagranjosh.com presents CBSE Class 9 Science Practice Paper for Summative Assessment 2, 2017. CBSE This paper is basically a collection of the important questions frequently asked in various CBSE schools across the country.
The pattern of this paper is based on latest CBSE Class 9 Science SA 2 Syllabus 2017. All the questions of this paper are extremely important for coming CBSE Class 9 SA 2 exam 2017.
Guidelines to solve this practice paper
(i) All questions are compulsory.
(ii) There is no choice in any of the questions.
(iii) The questions paper comprises of three Sections, A, B and OTBA. You are to attempt all the sections.
(v) Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in one word or one sentence.
(vi) Question numbers 4 to 5 Section-A are two marks questions. These are to be answered in about 30 words each.
(vii) Question numbers 6 to 16 in Section-A are three marks questions. These are to be answered in about 50 words each
(viii) Question numbers 17 to 21 in Section-A are five marks questions These are to be answered in about 70 words each.
(ix) Question numbers 22 to 30 in Section-B are multiple choice questions. Each question carries 1 mark. You are to select one most appropriate response out of the four provided to you.
(x) Question numbers 31 to 33 in Section-B are two marks questions. These are to be answered in brief.
(xi) There are three questions in OTBA Section. 1 question is of 2 marks, 1 question of 3 marks and rest 1 question of 5 marks.
Some sample questions from this practice paper
Question: Give the formula of barium chloride.
Question: What is the nature of light waves?
Question: Which equipment is used to weigh chemicals in the laboratories?
Question: Why do we prefer a sharp knife for cutting?
Question: A one rupees coin sinks, when placed on the surface of water. Why?
Question: A sound wave travels at a speed of 330 ms-1. If its wavelength is 1.5 cm, calculate the frequency of sound wave.
Question: Write any three characteristic features of algae.
Question: Why is it easier to swim in sea water when compared to pond?
Question: Give an example in each case where work done by a force is
Question: When the wire of a sitar is plucked, what kinds of waves are produced in the wire of sitar and air?
Question: State Archimedes' principle. What is the basic difference in thrust and pressure?
Question: Explain giving reasons.
(i) Balanced diet is necessary for maintaining healthy body.
(ii) Timely vaccination is important for infants.
(iii) Our surroundings should be free from stagnant water.
Question: Give the chemical formulae for the following compounds Carbon dioxide and Hydrogen chloride also compute the ratio by mass of the combining elements in each one of them.
Question: What is SONAR? Where is it used?
Question: Distinguish between an echo and reverberation.
Question: A rocket is moving up with a speed S. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
Question: Rakesh came to school with running nose and reddish eyes. He met Manoj in the morning assembly who advised him to sit on a separate desk in the classroom till he recovers.
(i) Name the disease from which Rakesh is suffering.
(ii) Name the causal organism.
(iii) Enlist any preventive measures.
Question: Give the range sound waves that an average human ear can detect? A source of wave produces 20 crests and 20 troughs in 0.2 s. The distance between a crest and next trough is 50 cm. Find the
Question: If different bodies are completely immersed in water and undergo the same loss in weight. Is it necessary that their weights in the air should also be the same? Justify your answer.
Question: (a) What are SI units of watt and kilowatt-hour?
(b) A 150 kg bus engine develops 500 W for each kg. How much force does it exert in moving the bus at speed of 20 ms-1?
(c) Express kilowatt in terms of joule per second.
Question: What is the full form of AIDS? Write any three important symptoms. Give any four preventive measures to control the spreading of this disease.