Study Vitamin

PART- A Q1: what is wildlife? Ans: plants and animals lives in their natural habitat is known as wildlife. Q2: what are five categories of threatened species instead in the red data book?  Ans: the five categories are:  1. Rare 2. Critical 3. Endangered 4. Vulnerable 5. Indeterminate Q3: mention the factors that cause depletion or loss of biodiversity?  Ans: these factors are:  1. Development 2. Hunting and fishing  3. Pollution 4. Practice of monoculture Q4 : name three international organisations involved in the conservation of biodiversity?  Ans: IUNC,WWF, and UNESCO. Q5 : what is the mission of man and the biosphere programme of UNESCO?  Ans: their main aim is make and maintain 193 biogeographical zones in the earth and protect plant and animal in their natural habitat. Q6: what is the aim of the joint forest management programme?  Ans: it is launched by government. Its aim is regenerate and protect the degraded forest by the people help. Q7: ...

PART-A Q1: name any ten metals. Ans :iron, copper, aluminium, sodium copper, silver, magnesium, gold, Mercury ,calcium. Q2: metals have high tensile strength, explain. Also give one example of how this property of metals is used. Ans: metals are very strong. It cannot be broken easily. Steel cables are used to carry heavy loads. Q3: why can't you (A) draw wires from a piece of wood or coal . Ans: because wood or coal are brittle and not flexible. (B) use nylon or jute ropes for  electrical transmission? Ans: no, because these are bad conductor of electricity. (C) use a cooking utensils made of cardboard. Ans: because , cardboard is a bad conductor of heat. It will not give heat in all direction. Q4: name five metals which are gaseous at ordinary temperature?  Ans: hydrogen coma oxygen nitrogen , neon,  chlorine. Q5:name two metals which react vigorously with cold water. Name one metal which, if ignited, continuous to burn in stream? Ans: sodium and potassium can react ...

Part - A Q1. What Happens To The Rays Of Light In case Of Diffuse Reflection? Ans. In Case Of Diffuse Reflection, The Rays Of A Beam Are Reflected In Different Directions. Q2. An Object Placed 10 Cm Infront Of A Plane Mirror. Where Is The Image Formed? How Far Is It From The Mirror?  Ans. Image Is Formed Behind The Mirror At 10 Cm From Mirror. Q3. How Many Images Are Formed When Object Placed Between Two Mirrors That Are Right Angle To Each Other. Ans. No. Of Images  360° / Angle Between Two Mirror -1 = 360 /90 =-1 = 4-1=3. Q4. What Is White Light? Give Example. Ans. The Colourless Light Formed By Mixing Of All The Colours Is Called White Light  For Example. Sunlight. Q5 Define Dispersion? Ans. The Splitting Of White Light Into Its Component Colours By Refraction Is Called Dispersion Of Light. Q6. Which Parts Of Eyes Make Up Its Converging Lens System?  Ans. Cornea, Lens And Fluids Make Up Converging Lens System. Q7. A Person Has Myopia. What Problem Does He Face? A...

    Chapter - The Cell  Ø The tiniest of organisms called  Unicellular Organisms.                                                 Ø A  Tissue  is a group of similar cells that perform a particular function.                     Ø The cell is the known as  Functional  unit of life                                                          Ø The lens that is close to the specimen placed on a stage is called the   Objective.     . Ø The lens through which you can see is called  Eyepiece.                                ...