IX ASSIGNMENT : SURFACE AREA AND PRESSURE & THRUST

IX TEST- SURFACE AREA & VOLUME AND PRESSURE & THRUST

1.       [2] The volume of a cuboid is 840 cm³. If its length is 14 cm and breadth is 5 cm. Find the height of cuboid?

2.       [2] Four equal cubes have side 5 cm each. They are joined together edge to edge. What will be the surface area of cuboid thus formed?

3.       [2] The total volume of a cube is 512 cubic cm. Find the side of a cube?

4.       [2] A rectangular box 14 cm long, 10 cm wide and 5 cm high is to be made with card-board. Find the area of card-board to make that box

5.       [2] The length, breadth and height of a room are 12 m, 10 m, and 9m respectively. Find the area of  four walls of room?

6.       [2] How much Aluminium sheet will be required to make a container with lid whose length is 13 m, breadth is 8 m and height is 4 m?

7.       [2] The floor of a rectangular hall has a perimeter 250 m If the cost of painting the four walls at the rate of Rs 10per m² is Rs 15000, find the height of the hall. 

8.       [2] Hameed has built a cubical water tank with lid for his house, with each outer edge 1.5 m long. He gets the outer surface of the tank excluding the base, covered with square tiles of side 25 cm. Find how much he would spend for the tiles, if the cost of the titles is Rs 360 per dozen. 

9.       [2] A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. It is 30 cm long, 25 cm, wide and 25 cm high.  (i) What is the area of the glass?   (ii) How much of tape is needed for all 12 edges? 

10.    [2] A river 3m deep and 40m wide is flowing at the rate of 2km per hour. How much water will fall into the sea in a minute? 

11.    [2] A solid cube of side 12 cm is cut into eight cubes of equal volume. What will be the side of the new cube? Also, find the ratio between their surface areas.

12.    [2] In what direction does the buoyant force on an object immersed in a liquid act?

13.    [2] Why does a block of plastic released under water come up to the surface of water?

14.    [2] The volume of 50 g of a substance is 20 cm³. If the density of water is 1 g cm⁻³, will the substance float or sink?

15.    [2] The volume of a 500 g sealed packet is 350cm³. Will the packet float or sink in water if the density of water is 1 g cm⁻³? What will be the mass of the water displaced by this packet?

16.    [2] A cube of mass 1kg with each side of 1cm is lying on the table. Find the pressure exerted by the block on the table. take g=10 m/s²

17.    [2] The density of turpentine oil is 840 Kg/ m³. What will be its relative density. (Density of water  is 1000 Kg /m³)

18.    [2] A solid body of mass 150 g and volume 250cm3 is put in water . will following substance float or sink if the density of water is 1 gm-3?

19.    [2] A body weighs 50 N in air and when immersed in water it weighs only 40 N. Find its relative density.

VIII SCIENCE

1.       Organic nutrients are called

(a)Fertilizers       (b) Manures       (c) Both a) and (b)           (d) None of these

2.       For safe storage of cereal grains, moisture content of the grain should not be more than

(a)84%                  (b)44%                  (c) 34%                                 (d) 14%

3.       Pasteurization of milk destroys its

(a)vitamins                         (b)fat contents (c) bacteria                         (d) None of these

4.       Carrier of malaria causing pathogen is

(a)House fly       (b)Cockroach     (c)Female Anophleses                   (d) None of these

5.       The raw material used for Teflon is

(a)ethene           (b)wood pulp    (c)ester                                (d)tetrafluoroethene

6.       The process by which artificial fibers are made is called

(a)Polymerisation            (b)plasticity        (c)elasticity                         (d)regeneration

7.       A superior synthetic fibre made by the polymerization of amide molecules obtained from petroleum is called:

(a)teflon              (b)nylon               (c) koroseal                        (d)rayon

8.       Which one of the following is a non-metal and good conductor of electricity

(a) zinc                  (b)lead (c) graphite                         (d)lithium

9.       Which among the following is not a noble gas

(a)helium                            (b)neon               (c)bromine                         (d)argon

10.   Which among the following is used in for making microchip for electronic goods

(a)sodium                           (b)sulpher           (c)silicon                              (d)phosphorus

11.   Which among the following is not a component of biodiversity?

(a)plant                                (b)animal             (c)microorganism                             (d)water

12.   Species which are restricted to a particular geographical region are called:

(a)endangered species (b)vulnerable species (c)endemic species  (d)wildlife

Sperms are produced by

(a)ovary (b)oviduct (c)testis  (d)uterus

13.   Which among the following is not a component of female sex organ?

  (a)uterus (b)oviduct (c)testis  (d)vagina

14.   Which among these is not a oviparous animal

(a)lizard (b)frog (c)lizard  (d)rat

15.   A car is heading towards south-east. The force of friction acting on the car is towards

(a)south-east (b)south-west (c)north-east  (d)north-west

16.   A cubical body has surfaces 5cm2, 20cm2,10cm2. Which surface will offer maximum frictional force

 (a)20 cm2 (b)10cm2 (c)5cm2  (d) all will offers same frictional force

17.   1kgf is equal to

(a)10 N (b)100 N (c)1000N  (d)none of these

18.   The force which exists between an electrically charged body and an uncharged body is:

(a)    electromotive force(b)electrostatic force (c)biological force  (d)magnetic force

19.   The practice of leaving the field uncultivated is called

20.   What are the two main crop seasons? Give three example of the crops grown during each season.

21.   What is crop rotation? Mention its advantages.

22.   Two diseases each caused by bacteria , fungi, protozoa and virus.

23.   What is vacnine? Who developed the first vaccine? How does it prevent us from the disease?

24.   What beneficial role do microorganism play in the life of human beings?

VACCINATION

What is a vaccination and how does it work?

Vaccinations protect you from specific diseases that can make you very sick, disable or even kill you. They boost your body's own defence system, which is also called the immune system.
Vaccines create immunity that protects you from an infection without causing the suffering of the disease itself.  Sometimes vaccines are called immunizations, needles or shots.
Here's how vaccines work:

• Most vaccines contain a little bit of a disease germ that is weak or dead. Vaccines do NOT contain the type of germ that makes you sick. Some vaccines do not contain any germs.
• Having this little bit of the germ inside your body makes your body's defence system build antibodies to fight off this kind of germ. Antibodies help trap and kill germs that could lead to disease.
• Your body can make antibodies in two ways: by getting the disease or by getting the vaccine. Getting the vaccine is a much safer way to make antibodies without having the suffering of the disease itself and the risk of becoming disabled or even dying.
• Antibodies stay with you for a long time. They remember how to fight off the germ. If the real germ that causes this disease (not the vaccine) enters your body in the future, your defence system knows how to fight it off.
• Often, your defence system will remember how to fight a germ for the rest of your life. Sometimes, your defence system needs a booster shot to remind it how to fight off this germ.

Sometimes vaccines prevent one disease. Sometimes they are combined to protect you from several diseases with one shot. For example, the MMR vaccine fights Measles, Mumps and Rubella (German measles).
Most vaccines given in Canada are by needle. Scientists are looking at new ways to give vaccines, such as by mouth or with nose spray.

IX-SA I Maths & Science [Euclid Geometry& Force]

Test IX- Maths & Science                           Euclid Geometry& Force                                

Maths

1.          Define

(a)  A Point

(b)  A Line

(c)  A Straight Line

2.          What is an axiom ( Postulate). How these differ from a Theorem.

3.          Prove that an equilateral triangle can be constructed on any line segment.

4.          Theorem: Prove that two line  cannot have more than one point in common.

5.          Write all five postulates of Euclid. Elaborate 5th  postulate.

Science

1.       A truck of mass 500 kg moving at at 4 m/s collides with another truck of mass 1500 kg moving at 2 m/s in the same direction. What is their common velocity just after the collision if they move together ? [ 2.5 ]

2.       A girl of mass 50kg jumps out of a rowing boat of 300 kg on to the bank, with a horizontal velocity of 3 m/s. With what velocity does the boat begin to move backward ? [ 0.5 ]

3.       Explain why, it is easier to stop a tennis ball than a cricket ball moving with the same speed.

4.       A 1000 kg vehicle moving with a speed of 20 m/s is brought to rest in a distance 50 metres:

(i) Find the acceleration.                                                                                                   - 4 m/s²

(ii) Calculate the unbalanced force acting on the vehicle.                                                    - 4000 N

5.       A ball P of mass 2 kg traveling at 2 m/s has a collision with another identical ball Q at rest .Ball P stop and Q starts moving. Calculate the velocity of Q after collision. [ 2 ]

6.       A boy tries to move a body by applying force of 10 N and it doesn’t move. He increases the force to 14 N but still he can’t move it. Calculate the change in force of friction from first to second case.

7.       Explain the second law of motion. Derive it mathematically. 

IX S TEST MOTION & MATTER AROUND US

                                                            Physics

1.        Define:

(i)   Displacement

(ii)  Velocity

(iii) Acceleration

(iv) Scalar & Vector Quantities

(v) Uniform & Non-uniform speed

2.        S I Units of (i) Speed (ii) Velocity (iii) Retardation (iv) time

3.        Differentiate distance and displacement ( give at least 3 differences)

4.        Derive equation of II law of motion

5.        A farmer moves along the boundary of a square field of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds?

6.        A train starting from rest attains a velocity of 72 km /h in 5 minutes. Assuming that the acceleration is uniform, find (i) the acceleration and (ii) the distance travelled by the train for attaining this velocity.

7.        An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 10 s?

                                                                                Chemistry

8.        Define : (i) Latent heat of vaporization  (ii) latent heat of fusion.

9.        When we pour some acetone or petrol on the palm, we get a cooling sensation . Give reason?

10.     Why does steam produce more severe burns on the skin as compared to boiling water ?

11.     Give reasons for the following observation:

       The smell of hot sizzling food reaches we  several  meters  away, but to get the smell from cold food we have to go closer.

12.     Give reasons

                (a) A gas fills completely the vessel in which it is kept in.

                (b) A gas exerts pressure on the walls of the container.

                (c) A wooden table should be called a solid.

                (d) We can easily move our hand in air but can‘t through a solid block of wood

IX S FA I TEST FACTORISATION ( POLYNOMIAL )

IX TEST FACTORISATION ( POLYNOMIAL )

M.M. 19 + 16                                                                                                                                                                                                                                                                        TIME: 60 MIN

1         [3]Show that (x-3  ) is a factor of 7x² – 19x – 6 

2         [4] Show that x + 1 and 2x – 3 are factors of 2x³ – 9x² + x + 12

3         [2 marks each] Factorize ( i to vi)

i.                     x² + 11x - 30

ii.                    x² - 6x - 55

iii.                  40 + 3x – x²

iv.                  9x² – 22x + 8

v.                   m² + 17mn – 84n²

vi.                  

1.        [3]Define                                                                                                                                             

                 (a)            Velocity

                 (b)            Acceleration

                 (c)            Uniform and Non-Uniform Motion

2.        [2]S I Units of (i) Speed (ii) Velocity (iii) Retardation (iv) time

3.        [2]A car traveling at 20 km/h speeds up to 60 km/h in 6 second. What is its acceleration ?          

4.        [3]Tabulate difference between Distance and Displacement     (At least three.)                                                                                                                             

5.        [1]A body displaces through 30 m eastward and 20 m northward. What is total displacement                                                                              

6.        [2]Define : (i) Latent heat of vaporization  (ii) latent heat of fusion.

7.        [1]When we pour some acetone or petrol on the palm, we get a cooling sensation . Give reason?

8.        [1]Why does steam produce more severe burns on the skin as compared to boiling water ?

9.        [1]  A car is moving with a uniform velocity of 40 km h ^–1. Its acceleration after 1 hour is

(a) 40 km / h²                                 (b) 20 km/ h²

(c) 30 km /h²                                                  (d) zero.

10.     [HOME WORK ]A body covers half the distance with a velocity of 15 m/s and the remaining half with a velocity of 30 m/s. Find the average velocity.                         

                                     

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IX SAI NO SYSTM & POLYNOMIAL

IX SAI IMPROVEMENT IN FOOD RESOURCES TEST 1

TEST IX- IMPROVEMENT IN FOOD RESOURCES

M.M. 35                                                                                                                                 TIME : 60 MIN.

1.        [1]For what purpose oysters are cultured?

2.        [1]What is Green manure?

3.        [1]Write major group of activities for improving the yield of crop.

4.        [2]What is the need for irrigation? Write various kinds of irrigation system employed.

5.        [2]Classify under mentioned  as Kharif [K] or Rabi Crop [R]

Mustard , Green Gram , Wheat , Gram , Paddy (Rice) , Pigeon Pea , Cotton , Sugarcane.

6.        [4]Define  [a] Mixed Farming [b] Mixed Cropping [c] Inter-cropping [d] Crop rotation

7.        [4]Give terms for the following:                                                                       

               I.      Animal reared for milk

             II.      Animal reared for labour

           III.      Young larvae of fish

           IV.      Chicken reared for meat

             V.      Chicken reared for eggs

           VI.      Species native of one region

         VII.      Species of foreign native

       VIII.      Farming that don’t use chemicals

Any six question [ from Q. 9 to Q.16 ]

8.        [2]What is  Compost & Vermi-composting?

9.        [2]What do we get from cereals, pulses, fruits and vegetables?

10.     [2]How do biotic and abiotic factors affect crop production?

11.     [2]Which method is commonly used for improving cattle breeds and why?

12.     [2]What are the desirable characters of bee varieties suitable for honey production?

13.     [2]What is pasturage and how is it related to honey production?

14.     [2]Why are manures and fertilizers used in fields?

15.     [3]Innumerate (Write) factors for which variety improvement is done.

16.     [3]What factors may be responsible for losses of grains during storage?