WORKSHEET SUBJECT-SCIENCE CLASS - IX SECTION-A: 2. Name a farming system with minimal or no use of chemical fertilizers?.

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1 WORKSHEET SUBJECT-SCIENCE CLASS - IX SECTION-A: 1. Write chemical formula of ammonium sulphate? 2. Name a farming system with minimal or no use of chemical fertilizers?. SECTION-B 3.(a)calculate the relative molecular mass of water. (b) Calculate the relative molecular mass of HNO 3. 4.deduce first low of motion from second law? An object of mass 100 Kg. is accelerated uniformly from a velocity of 5 m/s to 8m/s in 6 seconds. Calculate the initial and final momentum? 5. Explain the working and application of sonar? An object of mass 15 Kg is moving with a uniform velocity of 4 m/s.what is the kinetic energy possessed by the object? SECTION-C 6. Explain with examples (1) Mass number, (2) isotopes, (3) isobars? 7.Explain the following with examples. (a) Pure substance (c) Alloys (b )colloid A solution contains 20 gm of common salt in 340 gm of water.calculate the concentration in terms of mass by mass percentage of the solution? 8. What is a muscular tissue? Give its functions, types with well labeled diagram? 9. How do mollusca animals differ from arthropods? How do angiosperms differ from gymnosperms?

2 10. Four men lift a 250Kg box to a height of 1 m and hold it without raising or lowering it (a) How much work is done by the men in lifting the box? (b) How much work they do in just holding it? (c) Why do they get tired while holding it? (a) Write the statement of conservation of momentum. (b)from a rifle of mass 4 kg,a bullet of mass 50 gm is fired with an initial velocity of 35 m/s. Calculate the initial recoil velocity of the rifle? 11.(a)what is power? How do you differentiate kilowatt from kilowatt hour? (b)a rocket is moving up with a velocity v. if the velocity of this rocket is suddenly tripled,what will be the ratio of two kinetic energies? 12.(a)what is the nature of the distance time graphs for uniform and non uniform motion of an object? (b)what can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis? (a)an electric heater is rated 1500 W.How much energy does it use in 10 h? (b) A certain household has consumed 250 units of energy during a month. How much energy is this in joules? 13.(a) Draw oxygen cycle? (b) Explain the green house effect? 14.(a)Define weed. Give two examples (b) Why is it essential to remove weeds from agricultural field? (c) What are weedicides? Write one example 15. How is our atmosphere different from the atmospheres on Venus and Mars? (a) What causes winds? (b) List any three human activities that you think would lead to air pollution? 16.(a)what is the mass of: SECTION-D

3 (i) 1 mole of nitrogen atom (ii) 4 moles of aluminium atoms (atomic mass of Al=27). (iii) 10 moles of sodium sulphite. (b) What are polyatomic ions? Give examples. 17. What is meant by substance? Write properties of substance? Differentiate between mixture and compounds? Write three application of centrifugation. Differentiate between homogeneous and heterogeneous mixtures with example. 18. Answer the following- (a) Name the tissue that forms soft parts of leaf,stem, root and fruit. (b) Write the specific function of cardiac muscle. (c) Write 2 differences between tendon and ligament. (d) Name the tissue that forms inner lining of our mouth. (e) Write 2 functions of areolar tissues. 19. Explain the meaning of the terms and give an example in each of the following (a)symbiotic relationship (b) Phanerogams (c) Cryptogram (d) Saprophytic (e) Eukaryotic 20. Derive equation of motion by graphical method? (a)define kinetic energy and deduce its expression? (b)what is the work to be done to increase the velocity of a car from 30 km/h to 60 km/h.if the mass of the car is 1500 kg? 21.(a) state the universal law of gravitation. what is the importance of this law? (b) Write the difference between mass and weight? (c) Why does a sheet of paper fall slower than one that is crumpled into a ball?

4 Explain the following:- (a)pitch or shrillness (b) Note (c) Timbre (d) Loudness (e) Time period SECTION-E 22. Write an activity which shows the method of separation of two immiscible liquids? 23. What happens when concentrated HCl reacts with metanil yellow dye? The old stock of potatoes tastes sweet. Why? 24.(a)draw a neat diagram of a hydra (b) Label mesoglea and gastro vascular cavity. (a )name the groups of animals hydra belongs to (b) Name one species of this group which lives in colonies. 25. Shreeya was shown two slides of plant tissues-sclerenchyma and parenchyma. Is it possible for her to identify parenchyma out of the two slides? How 26. A student performs an experiment for the verification of laws of reflection of sound and plots a graph between the angle of incidence and reflection.what kind of a graph will that be? 27. Define the terms-(a) relative density (b) Thrust A ship while entering from an ocean to a river sinks a bit lower in the river water.

5 Worksheet 2 SECTION-A Q.1 What are canal rays? 1 Q.2 Define crop rotation. 1 Q.3 Explain: a) Sponge though compressible is a solid. b) Our palm feel cold when we put some acetone on it. 2 Q.4 A ball is dropped from a tower of height 5m. With what velocity does it strike the ground? (g= 10 m/s²) 2 Q.5 Why is a bucket of water lighter when in water than when it is taken out of water? 2 Q.6.a) What are the postulates of Bohr s model of an atom? b) Show diagrammatically the electron distribution in sodium atom. 3 Q.7 To aware the students on the World Environment Day, The teacher has organi ed a seminar on the topi lo al warming is glo al warning a) What values exhibited by the school teacher? b) How do CFCs destroy ozone layer? c) What would be the effect of global warming on Earth? 3 Q.8 Write the chemical formulae of: a) Potassium Chloride b) Nitric Acid c) Aluminium Sulphate 3 Q.9 How Nitrogen is fixed in nature? Explain with the help of Nitrogen Cycle. 3 Q.10 Mention the composition and function of: Bone, Cartilage and Blood. 3 Q 11 Why is mito hondria alled power house of ell? ive two similarities and one differen e between mitochondria and plastids. 3 Q 12 Continuous use of fertili ers destroys soil fertility Dis uss three new te hniques of cropping pattern and their significance. 3 Q 13 a) State Newton s se ond law of motion b) Which would require a greater force accelerating a 2kg mass at 5m/s² or a 4kg mass at 2m/s²? 3 Q.14 Derive an equation for position-time relation with the help of a graph. 3 Q.15 a) Why are roofs and walls of an auditorium generally covered with sound absorbent materials? b) Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium. 3 Q.16 Identify the following tissue: i) Tissue that stores fat in our body. ii) Tissue present in the brain. iii) Tissue that transports food in plants. iv) It gives buoyancy to lotus to help it afloat. v) Tissue present in lung alveoli. 5 Q.17 i) How force of attraction depends on the mass of objects and distance between them? ii) The mass of Earth is kg and that of the natural satellite is kg. If the distance between them is km. Calculate the force exerted by Earth on it. [G= Nm²/kg² ] 5 OR i) What is the range of hearing? ii) Draw labeled structure of human ear.

6 Q.18 i) Give the scientific names ofa) Frog b) Human Beings ii) Name two egg laying mammals. iii) Write the characteristic features of phylum Arthropoda. 5 Q.19 i) What is SONAR? Explain its working. ii) Mention two applications of Ultrasound. 5 Q.20 i) Define evaporation. Out of nylon and cotton clothes, which will be more comfortable during summer and why? ii) Is evaporation and boiling the same? If not, why? 5 Q.21 What is chromatography? How will you separate the components of black ink using chromatography? Write its any two applications. 5 OR Compare solution,suspension and colloid on the basis ofi) Appearance ii) Visibility of particles iii) Stability iv) Scattering of light v) Filterability SECTION-B Q.22What happens when a mixture of iron and sulphur is heated? 2 Q.23 Which two precautions you will take to measure the volume of a cylinder? 2 Q.24 Write two characteristics of pinus plant. 2 Q.25 5ml of dettol is added to a beaker containing 500ml of water and stirred. State two observations that you make. 2 Q.26 Two identical bullets are fired, one by a light rifle and another by a heavy rifle with same force. Which rifle will hurt the shoulder more and why? 2 Q.27 What are adulterants. Mention different adulterants found in food items. 2

KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION

KENDRIYA VIDYALAYA SANGATHAN, HYDERABAD REGION SAMPLE PAPER 02 F SESSING ENDING EXAM (2017-18) SUBJECT: SCIENCE (086) BLUE PRINT : CLASS IX UNIT Matter - Its Nature and Behaviour Organisation in the Living