Uttarakhand Board Class 9 Half Yearly Exam 2021 Question Paper Science

Rail No. Name D/21-22 No. of Printed Page:01 Half Yearly Examination 2021-2022 Time: 2.30 Hrs. Subject Science Note- All Class-9 M.M. 70 question are compulsory. Mark of all against them. question are marked 1. Choose the correct (0) answer: Which of the following is 6 highly compressible ? (a) Solid (b) Liquid (c) Gas (d) Solid and Liquid (ii) Chemical formula of common salt is- (a) NaC (b) HCI (c) NaOH (d) HNO (ii) Which is called Suicidal bags of cell ? (a) Ribosome (b) Lysosome (c) Nucleus (d) Golgi body (iv) Formula to find the momentum is (a) P m/v (b) P= mv (c) P v/m (d) P = mv (v) Which of the following is blood pressure measuing instrument (a) Thermometer (b) Voltmeter (c) Sphymomkanometer (d) Ammeter (b) The symbol of sodium is : (i) N (ii) S (ii) Na (iv) Ni 2. Which non metal is liquid at room temperature ? 1 3. What do you understand by free fall ? 1 4. Write the name of malaria parasite? 5. Write the name of solute and solvent in tincture iodine? 1 6. Convert the following temperature to Celsius scale 2 345 K (ii) 293 K 7. Calculate the atomic mass of CO2. ? 2 house of the cell ? 2 8. Why mitochondria is known as power 2 9. What do you understand by inertia? Cat** and calculate the 10. Write down the electronic configurationof numbers of electrons in it ? 2 (1) .3

11. What is force ? What is the relationship between force and acceleration? 2 12. What is immunisation ? 2 13. State the drawbacks of Rutherford's atomic model ? 2 14. What is Newton's law of gravitation ? State the value and unit of G ?3 15. Write down the formulae of 3 (i) Calcium Chloride (i) Sodium Hydroxide (ii) Potassium Nitrate 16. State the difference between animal cell and plant celi. 3 17. A car decreases its speed from 80 Km/h to 60 Km/h in 5 second. Find the acceleration of the car ? 3 18. Explain the laws of chemical composition? 3 19. What is soil erosion ? What are the methods to prevent it ? 3 20. Explain the vector and scalar quantities with examples? 3 21. Drawa labelled diagram of nerve cell7 3 22. Explain Newton's laws of motion with examples ? 4 23. Write down the difference between () Compound and Mixture (ii) lsotopes and isobars 24. A train starting from rest attains a velocity of 72 Km/h is 5 minute. Assuming the acceleration is unifrom. Find. 4 (i) The Acceleration (ii) Distance travelled by train for this velocity? 25. Draw a labelled diagram of a plant cell1? 4 26. Name the following (i) Tissue that forms inner lining of mouth ? (ii) Tissue present in the brain ? (i) Tissue that transport food in plants ? (iv) Tissue that connects muscles to bone ? 2)