exam practices 9 science

MAXIMUM TIME: 35 minutes MAXIMUM MARKS: 20 marks 1.    What is wavelength? (1) 2.    What is pitch? (1) 3.    What should be the time interval between the originated sound and the reflected sound to heard distinctly? (1) 4.    A ship sends out ultrasound that returns from the seabed and is detected after 3.42 s. If the speed of ultrasound through seawater is 1531 m/s . What is the distance of the seabed from the ship? (3) 5.    Define amplitude, time period and frequency of sound water. (3) 6.    Why do we say that sound waves are longitudinal? (2) 7.    Give three uses of ultrasound. (3) 8.    Sound cannot travel in vacuum. Describe an experiment to demonstrate this. (4) 9.    A child watching Dussehra from a distance sees the effigy of ravana burst into flames and hears the explosion associated with it 2 s...

Total Marks: 30 Total Time: 40 mins 1.    Define one watt of power. (2 Marks) 2.    Name twy physical quantities whose unit is Joule. (2 Marks) 3.    What is gravitational potential energy? (2 Marks) 4.    What is the commercial unit of energy? Define it. (3 Marks) 5.    Give one example where work done on an object is negative. (3 Marks) 6.    What work is said to be done to increase the velocity of a car from 15 km/h to 30 km/h, if the mass of the car is 1000 kg? (3 Marks) 7.    A body possess potential energy of 460 J whose mass is 20 kg and is raised to a certain height. What is the height when g = 10 m/s 2 . (3 Marks) 8.    Derive the formula for kinetic energy. (4 Marks) 9.    With pendulum as an example the law of conservation of energy. (4 Marks) 10.  ...

MAXIMUM TIME: 35 MINUTES MAXIMUM MARKS: 20 marks 1.   Give the S.I. unit of G and its value.      1 2.   g=GM/R 2 , what does these symbols denote?      1 3.   When a ball is let free fall from the top of building. What is the acceleration and what its sign?      1 4.   A ball is projected vertically upwards with an initial velocity ‘u goes to a maximum height ‘h’ before touching the ground. What is the value of ‘h’ ?      2 5.   How is the weight of an object related to its mass?      2 6.   The mass of the body on earth is 60kg, what is its weight on the earth and on moon.      2 7.   The mass of earth is 6x10 24  kg and that of the moon is 7.4x 10 22 kg. If the distance between the earth...

Max Time:30 mins Max Marks:25 1.   Why do passengers tend to fall sideways when the bus takes a sharp u turn?            (2 marks) 2.   Why should a passenger hold on to prevent himself from swaying in a turning bus?            (2 marks) 3.   Why do passengers tend to fall back when it starts suddenly?            (2 marks) 4.   Why do passengers jumping out of a rapidly moving bus fall forward with his face downwards, if he does not run forward?            (2 marks) 5.   Why does a passenger jumping out of a rapidly moving bus fall forward with his face downwards?            (2 marks) 6.   Wh...

Time: 60 Minutes MM- 35 Two Mark Questions 1.   Define the term displacement. Is it a vector quantity or a scalar quantity? 2.   What is circular motion? Is circular motion an acceleration motion? 3.   Derive mathematically the first equation of motion V=u + at? Three Mark Questions 4.   A boy runs for 20 min. at a uniform speed of 18km/h. At what speed should he run for the next 40 min. so that the average speed comes 24km/hr. 5.   A train accelerated from 10km/hr to 40km/hr in 2 minutes. How much distance does it cover in this period? Assume that the tracks are straight? 6.   A train starts from rest and accelerate uniformly at the rate of 5 m/s 2  for 5 sec. Calculate the velocity of train in 5 sec. 7.   A bullet leaves a rifle with a muzzle velocity of 1042 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 1.680 m. Determ...

Maximum time- 35 minutes Maximum marks- 25 1.   Name few common practices used for dairy industry.      (4 marks) 2.   Explain different types of fisheries.      (5 marks) 3.   Give any two differences between manure and fertilizers.      (2 marks) 4.   What are the different cropping systems?      (3 marks) 5.   How can weeds be controlled?      (3 marks) 6.   What is the difference between egg-layers and boilers?      (2 marks) 7.   What are manures? How are they classified?      (4 marks) 8.   Name any two Indian cattle.      (2marks)

Maximum time: 35 minutes Maximum marks: 20 marks 1.    Define Nitrification. (1) 2.    Name four factors which lead to soil formations (2) 3.    What make the quality and type of soils? (2) 4.    How does atmosphere help in climate control? (2) 5.    What is acid rain? Give its harmful effects. (3) 6.    What is greenhouse effect? Why it is named so? (3) 7.    What is the importance of ozone to mankind? (3) 8.    Explain the physical, chemical and biological factors which lead to the formation of soil. (4)

MAXIMUM MARKS: 20 MARKS MAXIMUM TIME: 35 MINUTES 1.    What are pathogens? 2.    Name two disease spread by bacteria and by fungi each. 3.    Name two air-borne diseases. 4.    What are acute diseases? 5.    Give difference between chronic and acute disease. 6.    State two main causes of diseases. 7.    Why sick person is advised to take rest? 8.    Give function of antibiotic penicillin. 9.    What are disease specific means of prevention? 10.    What are basic conditions of good health? 11.    What are three limitations for the approach to deal with infectious disease? 12.    Write a short note on malaria as a disease, its symptoms and control.

MAXIMUM MARKS: 20 MARKS MAXIMUM TIME: 35 MINUTES 1.    What is thallus? (1mark) 2.    Differentiate between flying lizard and bird (1 mark) 3.    Why bryophytes are called amphibians of plant kingdom (2marks) 4.    Difference between cryptogams and phanerogams (2marks) 5.    Difference between monocots and dicots (2marks) 6.    Why do we keep both snake and turtle in the same class? (2marks) 7.    Name the phylum of the following.             a. Jellyfish             b. Octopus             c. Ascaria             d. Spider            (2marks) 8.   ...

Maximum marks- 30 Maximum time- 45 mins 1.   Write a note on plant tissues? (5 marks) 2.   What is the function of connective tissues? Explain its types. (4 marks) 3.   Draw a structure of a nerve cell (neuron). (3 marks) 4.   What is the region where parenchyma tissue is present? (2 marks) 5.   What is the point of difference between cardiac muscle and striated muscle? (2 marks) 6.   Draw a neat diagram of a smooth muscle. (3marks) 7.   Where is epical tissue present? (1 mark) 8.   What are the various types of an animal tissue? (5 marks) 9.   Write the difference between xylem and phloem. (3 marks) 10.   Write the difference between a bone and cartilage. (2 marks)

Maximum time-30 minutes Maximum marks- 25 1.   Explain the process of osmosis and give an example. (2 marks) 2.   What are the functions of plastids?  (3 marks) 3.   Explain the difference between Prokaryotic cell and Eukaryotic cell(4 marks) 4.   What are genes? What is the difference between genes and chromosomes? (3 marks)    5.  Why are lysosomes called suicidal bags?        (2 marks) 6.   Draw a neat diagram of a plant cell.         (4 marks) 7.   Write a short note on Plasma Membrane.              (3 marks) 8.   Why is the inner membrane of Mitochondria folded?        (2 marks) 9.   Name the smallest and the longest cell in human body. (2 marks)...

Total Marks : 30 Total Time : 40 min 1.    What are nucleons? (2 Marks) 2.    Give the electronic configuaration of Cl –  ion. (2 Marks) 3.    Draw the atomic structure of helium atom. (3 Marks) 4.    What are isobars? (2 Marks) 5.    What is mass number of an atom? (2 Marks) 6.    Find the valency of  (3 Marks) 7.    What are isotopes? Give its two applications. (3 Marks) 8.    An atom is electrically neutral. How can it become charged? (3 Marks) 9.    Explain Rutherford’s α-particle scattering experiment and give its observation and conclusion drawn. (4 Marks) 10.    Give the difference between three sub-atomic particles. (3 Marks) 11.    Give the names of three atomic species of hydrogen. (3 Marks)

Time- 60 Minutes MM- 30 1.   Camphor disappears without leaving any residue. Explain?                            (2) 2.   Why do we feel cool when we touch a piece of ice?                         (2) 3.   What is Latent Heat of Fusion?                                          (2.5) 4.   Define latent heat of Vaporization?                                      (2.5) 5.   How can you show that evaporation causes cooling?               (3) 6.   How can you justify that table is a solid?              ...

Maximum marks: 30 (3 each) Time: 40 minutes 1.   How to separate two immiscible liquids? 2.   What is water called a universal solution? 3.   Give the differences between true solution, colloidal solution and suspension? 4.   Draw a flow diagram to show the water purification system is water works. 5.   Give two applications of centrifugation. 6.   How can you prove that water is a compound? 7.   How can we convert saturated solution into unsaturated by heating? 8.   What is the difference between fog and smoke? 9.   Show the different types of colloids with examples. 10.   What is Tyndall effect?

Maximum marks- 25 Maximum time-35 minutes 1.   What are the rules for writing the symbol of an element?      (3) 2.   Explain relative atomic mass and relative molecular mass.      (2) 3.   What is the relationship between mole, Avogadro number and mass?      (3) 4.   How do atoms exist?      (2) 5.   Define a mole. What is the importance of a mole?      (3) 6.   Calculate the mass of one atom of oxygen      (1.5) 7.   Calculate the mass of one ion of oxygen      (1.5) 8.   What do you understand by atomic mass and Gramatomic mass of an element?      (2) 9.   The formula of water is H2O. What do you understand by this formula?  ...