Things, which do not grow, move, or respond are called non-living things. Things that grow, breathe, and respond are called living things. PROPERTIES OF LIVING THINGS (a) All living things grow: Infant grows into a child, Plants grow from seeds, Puppies grow into dogs, and kittens grow into cats. (b) All living things can move: Living things move from place to place in search of food iscalled Locomotion (c) All living things need food to live: Living things eat food to get energy to live. (d) All living things Respire: Living things eat and digest foods that get oxidized in body to release energy. This process is called Respiration. Respiration occurs inside body. Exchange of carbon dioxide and oxygen in living body is called breathing. Breathing occur outside the body. Plant breath through stomata and animal through nose. Small animal and microbes exchange gases by diffusion. (e) All living things reproduce: Living things can produce young one of similar kinds. This process is called reproduction. Some animal give birth to young ones like dog, cow; Some animal lay eggs like bird, hen ; Plant grow from seeds ,stem and root etc. (f) All living things respond: Living things can respond against touch, heat, light and gravity called stimulus. Change in our surrounding that make living things respond to them, are called stimuli. Touch me not plant show response to touch and its leaves hang down. (g) All living things are made up of different kinds of cells. Group of cell is called tissue. Group of tissue is called organ. A group of organs is called organ system that work together to keep our body live. (h) Living things excrete: Living Things throw waste outside body like sweat, urine, faeces. This process is called excretion. Plants excrete gum, leaves, latex etc Q. What is habitat? Answer: The surroundings where plants and animals live, is called their habitat. The presence of specific features, which enable a plant or an animal to live in particular habitat, is called adaptation. Q. Which organism grow throw their lives Ans: Plants more....
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Q1. Define force and its SI unit?
Q 2. Distinguish between balanced and unbalanced force? Q3. State three laws of motion? Q 4. What is inertia? Is inertia vector quantity. Justify? Q5. What is impulse? Prove that Impulse is equal to change in momentum? Q. 6. Define momentum and Prove that F = ma Q 7. Is it possible that a body keeps on moving with uniform velocity with? If yes give reason also name scientist who explained this statement? Q 8. Why a person sitting in bus fall forward when moving bus suddenly stops? Q9. Why people sitting in bus fall backward when bus suddenly starts? Q10. Why dust fall on beating carpet with stick? Q11. Why leaves fall when we are shacking branch of tree? Q12. Why an athlete runs certain distance before taking long jump? Q13. When bus takes u turn, passengers sitting inside thrown a side. Why? Q14. Explain why it is difficult for a fireman to hold a hose, which ejects large amount of water at a high velocity. Q15. How a karate player can break a pile of tiles with a single blow of his hand? Q.16. Why does a bullet when fired against a glass window pane make a hole in it, and the glass pane will smash it? Q.17. Why is it advised to tie a rope on the luggage while you travel by the bus? Q18.Why vehicles are provided with shocker? Q19. Why does a bicycle begin to slow down when we stop pedaling? Q20. State and verify the law of conservation of momentum? Q21. When we hit at the bottom of the pile of carom coins, other coins fall vertically on the carom board why? Q22. Two balls A and B of masses 'm' and '2 m' are in motion with velocities '2 v' and 'v' respectively. Compare (i) their inertia (ii) their momentum and (iii) the force needed to stop them in the same time Q 23. A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40,000 N and the track offers a friction force of 5,000 N then calculate: (a) the net accelerating force (b) the acceleration of the train (c)the force of the wagon 1 on rest of the wagons. Q 24.According to the third law of motion when we push on an object, the object pushes back on us with an equal and opposite force. If the object is a massive truck parked along the road side, it will probably not move. A student justifies this by answering that the two opposite and equal forces cancel each other. Comment on this logic and explain why the truck does not move. Q25.A machine gun can fire 50 g bullets with a velocity of 150 m/s. A 60 kg stone is moving towards the machine gun velocity of 10 m/s. How many bullets must be fired from the gun to just stop the stone in its tracks? Class IX Science SA-1 Quick Links IX Motion and rest IX Force and Law of motion IX Gravitation IX Matter in our surrounding IX Is matter around us pure IX Biology Term-1 What is an equation?
A statement which contains the equal sign = is known as an equation. eg; 2x -4x=2x , 45=0 1. The sum of the ages of anup and his father is 100. When anup is as old as his father now, he will be 5 times as old as his son anuj is now. Anuj will be eight years older than anup is now, when anup is as old as his father. What are their ages now? Let the present ages (in years) of Anup’s father, Anup and Anuj be x, (100 – x) and respectively. Difference between Anup’s father and Anup’s ages (in years) = x – (100 – x) = x – 100 + x = 2x – 1002x – 100 years later, Anup will be x years old and 5 times old as Anuj is now.X = 5y y = x/5 -----------(i) When Anup is x yr old,then Anuj will be y +(2x-100)yrs old and 8yrs older than Anup is nowTherefore y + (2x-100) = (100 – x ) + 8 -------------(ii) On putting y = x/5 from (i) we get X = 65 yrs So Anup’s fathers age = 65 yrs, Anup’s age = 100-65 = 35 yrs , Anuj ages = x/5 = 65/5 = 13 yrs 2. I am currently 5 times as old as my son. In 6 years of time I will be three times as old he will be then. What are our ages now? Let the Age Of Me Be 5x And Sons be x. After 6 Years 5x+6 And x+6 It is Given that I Would Be Three Times The Age Of My Son 5x+6 = 3(x+6) 5x+6 = 3x+18 Þ 5x-3x = 18-6 2x = 12Þx = 6 So My Age = 6x5 = 30 Answer: My Age- 30 Years, Sons Age 6 Years See full solved questions Read For: VIII Linear equations of one variables test paper-1 VIII Linear equations of one variables test paper-2 VIII Linear equation of one variables test paper-3 VIII Linear equations of one variables test paper-4 VIII Linear equations of one variables test paper-5 Visit Download sections 1. Define : gravitation, gravity and gravitational force. 2. State the universal law of gravitation and its mathematical form. 3. In what source is ‘G’ universal? 4. What happens to the force of attraction between two objects when (i) Their mass are halved? (ii) Distance between them is increased to 4 times its previous value. (iii) Distance between them as well as each of the mass is increase to 4 times. 5. If the distance between two bodies is increased 4 times by what factor should the mass of the bodies be altered so that the gravitational force between them remains the same? 6. What is the force between two spheres weighing 20 kg each... Read more » Class IX Science SA-1 Quick Links
IX Motion and rest IX Force and Law of motion IX Gravitation IX Matter in our surrounding IX Is matter around us pure IX Biology Term-1 The term "magnetic effects of current " means that " a current flowing in a wire produces a magnetic field round it ". the magnetic effect of current was discovered by Oersted found that a wire carrying a current was able to deflect a magnetic needle. It concludes that a current flowing in a wire always gives rise to a magnetic field round it. Magnetic field. The region around a magnet where the force of attraction or repulsion can be detected is called magnetic field. Magnetic field around a magnet can be detected by using a magnetic compass. Magnetic field lines :- Magnetic field lines are the paths around a magnet along which the north pole of a magnetic compass needle tends to move. The magnetic field lines around a magnet can be observed by sprinkling iron filings around a magnet. It can also be observed by moving a magnetic compass around a magnet. i) The magnetic field lines emerge at the north pole and merge at the south pole. ii) The magnetic field lines are closer at the poles. iii) The magnetic field lines do not intersect each other.Magnetic field due to a current carrying conductor :-If a magnetic compass is placed near a conductor carrying current (wire), the needle is deflected. This shows that a conductor carrying current has a magnetic field around it. If the direction of the current is from north to south, the deflection of the magnetic needle is towards the east.If the direction of the current is from south to north, the deflection of the needle is towards the west. The magnetic field around a current carrying straight conductor is in concentric circles. It can be observed by passing a current carrying straight conductor through a cardboard and sprinkling iron filings on it. Related search: X Magnetic Effects of Currents Notes Download File X Magnetic Effects of Currents CBSE Test Paper - 1 Download File X Magnetic Effects of Currents CBSE Test Paper - 2 Download File X Magnetic Effects of Currents CBSE Test Paper - 3 Download File X Magnetic Effects of Currents assignment for FA - 1 Download File X Magnetic Effects of Currents assignment For SA - 2 Download File |
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