1 MARKS QUESTIONS Ans.This will result in water logging of the soil due to which roots cannot breathe and ultimately plants will die . 1. Differentiate autotrophs and heterotrophs. Anaerobic respiration 2. Glucose is incompletely oxidised to ethanol or lactic acid 3. Less energy is produced 2ATP Respiration in animals 1.In animals respiratory organs are generally present 2.The rate of respiration is fast.
Saprophytic nutrition (a) CO2- from air, (b)water-from soil (c)minerals-from soil along with water. A) Chloroplast b)guard cell c)lower epidermis d)upper epidermis Name the two stages in photosynthesis.
Chapter 6 Life Processes Study Notes
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CBSE X CONSTRUCTIONS (Maths) Division of a Line Segment ,Construction of Tangents to a Circle,To construct a triangle similar to a given triangle as per given scale factor,To construct the tangents to a circle from a point outside it. You will learn to do the following constructions : 1. To divide a line segment in a given ratio. 2. To construct a triangle similar to a given triangle as per given scale factor which may be less than or may be greater than 1. 3. To construct tangent at a point on a given circle. 4. To construct the pair of tangents from an external point to a circle Q. Draw a circle of radius 3.2 cm. Take a point P on this circle and draw a tangent at P.(using the centre) Given: Radius of the circle = 3.2 cm. Steps of construction(i) With O as the centre draw a circle of radius 3.2 cm. (ii) Take a point P on the circle and join OP. (iii) Draw an arc of a circle with centre at P cutting OP at L. (iv) Mark M and N on the arc such that m(arc L M ) = m(arcMN) (v) Draw the bisector PT of the angle <MPN (vi) Produce TP to Tlto get the required tangent T'PT. 10th Geometry topic -Construction [Guess Question paper for CBSE Board] Download File  JSUNIL TUTORIAL, SAMASTIPUR 10TH CARBON AND COMPOUND MCQ
Q1. Which of the following is not a saturated hydrocarbon ? i) Cyclohexane. ii) Benzene. iii) Butane iv) isobutene Q2.The bond between two identical non metallic atom has a pair of electron ? i) unequally shared between two atoms. ii) Transferred completely from one atom to another. iii) With identical spins iv) Unequally shared between them. Q3. Covalent compounds are generally i) Soluble in water ii) Insoluble in water iii) Ionize in water iv) Hydrolyse in water Q4. Propane with the molecular formula C3H8 has i)7covalent bonds ii)8 covalent bonds iii)9 covalent bonds iv) 10 Covalent bonds. Q5. A hydrocarbon reacts with ammonical cuprous chloride solution to form a red precipitate . The hydrocarbon is i)ethane ii)ethene iii)butane iv)1-propyne Q6.Which of the following substance is added to denature Ethanol ? i)methanol ii)pyridine iii)copper sulphate iv)all of them Q7. Which of the following is not an allotropic form of carbon i)fluorine ii)fullerene iii)diamond iv)graphite Download full paper Visit
The Human Eye and Colorful World FA - III (PAPER Pen Test)
Section A Multiple choice questions: - 1. When we enter a cinema hall, we cannot see properly for a short time. This is because-a) Pupil does not open b) Pupil does not close c) Adjustment of size of pupil takes some time d) None of these above Ans: (c) 2. The property of persistence of vision is used in- a) Short sightedness b) Long sightedness c) Cinematography d) Colour vision Ans: (c)3. Variable focal length of eye is responsible for- a) Accommodation of eye b) Persistence of vision c) Colour blindness d) Least distance of distinct vision Ans: (a)4. A concave lens of suitable focal length is used for correcting a- a) Myopic eye b) Hypermetropic eye c) Both a and b d) nor a nor b Ans: (a)5. Splitting of white light into seven colours on passing through the glass prism is called-a) Reflection b) Refraction c) Scattering d) Dispersion Ans: (d) Section B 1. A person with a myopia eye cannot see objects beyond a distance of 1.5m. What would be the power of corrective lens? Which type of lens is used? (2) 2. What do you understand by myopia? Write two causes of it? (2) 3. What do you mean by far point and near point of eye? (2) 4. What is presbyopia? State the causes of it and How is it corrected? (3) 5. Explain: (3) 1) Why does sky look blue on a clear day 2) Twinkling of stars. 6. What is Hypermetropia? State two causes of Hypermetropia with help of ray diagrams show i) The eye defect hypermetropia. ii) Correction of Hypermetropic by using a lens. :(5 mks) Read and download 10th Human eyes and Colorful World (Sure shot For CBSE Board Examination) 10th Human eyes and Colorful World (Sure shot Test paper and Sample paperFor CBSE Board Examination) POINTS TO REMEMBER:
1) ECOLOGY – The study of the interaction of living organisms with each other and their surroundings is called ecology. 2) ENVIRONMENT – Everything that surrounds organisms and influences its life. a) Biotic components of environment --- The living organisms .e.g. Plants and animals. b) Abiotic components of environment --- The nonliving components like water, air, light, etc. It is the sum total of all external conditions and influences that affect the life and the development of organisms i.e.,it includes all the biotic and abiotic factors. 3) ECOSYSTEM – All interacting organisms in an area together with the nonliving constituents of environment. (Functional unit of an environment) Functions of ecosystem:- a) Flow of energy b) Cycling of nutrients(bio-geo chemical cycles). 4) PRODUCERS --- They make the energy from sunlight available to the rest of the ecosystem. 5) CONSUMERS --- Animals can not manufacture their own food. They are called consumers. 6) BIODEGRABLE ---- Substances that are broken down by the action of bacteria or other saprophytes. e. g. – Paper. 7) NONBIODEGRABLE --- Substances that are not broken down by the action of bacteria or saprophytes. e. g. Plastic. 8) FOOD CHAIN ---- The process of one organism eating the other. GRASS -> GRASSHOPPER -> FROG -> SNAKE Importance of food chain 1.It helps in transfer of food energy from one organism to another. 2.It is a pathway for the flow of energy. 3. It helps in understanding the interdependence amongst different organisms. Trophic levels are the various steps in the food chain . Producers --- first trophic level Herbivores --- second trophic levels Carnivores --- third trophic level Top carnivores --- fourth trophic level 9) FOODWEB ----- It is a network of food links between populations in a community. 10) FLOW OF ENERGY -Ten percent law Energy available at each successive trophic level is 10 % of the previous level. (Lindeman 1942) The law states that, “ only a 10 % amount of the total available energy is transferred from one trophic level to the next. The rest 90% of energy is used up or lost to the surrounding.” 11) BIOLOGICAL MAGNIFICATION --- Progressive accumulation of nonbiodegradable waste at various trophic levels of food chain. 12. Differences between food chain & food web Food chain 1. The process of eating & being eaten to transfer food energy. 2. It forms a part of food web. 3. It has limited populations. Food web 1. It is a system of interconnected food chains. 2. It contains many food chains. 3. It has several populations of different species. 13. HOW DO OUR ACTIVITIES AFFECT THE ENVIRONMENT? Two major problems:- a) Depletion of ozone layer b) Disposal of wasteGood ozone and bad ozone The thick blanket of ozone layer in the atmosphere which forms a protective cover & prevents UV radiation from reaching the earth‘s surface. This is called good ozone and is found in the stratosphere. Ozone when present in the troposphere act as a pollutant . This harmful ozone is called bad ozone. 14. Depletion of ozone layer : The ozone layer protects all the organisms from the harmful ultra violet rays. Ozone depleting substances: CFCs, N2O, CH4 , CCl4 These chlorine containing compounds are used in: Aerosols, solvents, refrigerants and fire extinguishers. Ozone hole developed over Antartica. 15. Effects of ozone depletion on human health- Due to depletion of ozone layer UV radiations reaches the earth and cause: i) skin cancer ii) increased chances of cataract iii) suppression of immune system . Managing the garbage we produce 16. Reasons for large production of garbage i) Improvement in life style ii) Changes in attitude (more things become disposable) iii) Population explosion iv) Changes in packaging(non -biodegradable) More topics to read FORMATIVE ASSIGNMENT - III 10th Our Environment 10th Our Environment HIGHER ORDER THINKIN SKILLS (HOTS) QUESTIONS 10th physics Chapter - 15 Our Environment POINTS TO REMEMBER Q1. Find the co-ordinates of a point which divide the segment AB in the ration 3:5 internally, where A(4 , –1 ) and B(–2, 4).
Q2. Find the co-ordinates of points of trisection of the segment joining points (4, –8) and (7, 4). Q3. In what ratio does the point (3, 12) divide line segment joining the points (1, 4) and (4, 16)? Q4. Determine the ratio in which the line 3x + y – 9 = 0 divides the segment joining the points (1, 3) and (2, 7). Q5. Find the point which represent 3/4 of the distance from (3, 2) and (–5, 6). Q6. (a) In what ratio the line segment joining the points (–2, –3) and (3, 7) divided by y-axis? Also, find the co-ordinates of the point of division. (b) In what ratio the line segment joining the points (2, –3) and (5, 6) divided by y-axis? Also, find the co-ordinates of the point of division. Q7. If A (5, –1), B (–3 , –2) and C (–1, 8) are the vertices of ∆ABC, find length of median through A And also find the co-ordinates of the centroid. Q8. Find the co-ordinates of vertices of triangle, if the co-ordinates of mid points of sides of the Triangle are: (a) (3, 2) , (4, 4) and (1, 3) (b) (3, 4) , (4, 1) and (2, 0) Q9. Find co-ordinate of centroid of triangle whose vertices are: (a) (–2, 1) , (–3, 4) and (8, –11) (b) (–2, 4) , (7, –3) and ( 4, 5) Q10. Find the third vertex of triangle, if its two vertices are (–4, 1) and (5, 2) and its centroid is (1, 3). Q11.Three consecutive vertices of a parallelogram are (–2, –1), (1, 0) and (4, 3). Find its fourth vertex. Q12. Find the co-ordinates of points which divide the line segment joining the points (–4, 0) and (0, 6) in four equal parts. Q13.Find the value of x such that PQ = QR, where the co-ordinates of P, Q and R are (6, –1), ( 1,3) And (x, 8). Q14. Find the point on x-axis which is equidistant from points (7, 6) and (–3, 4). Q15. A line segment joining the points (3, –4) and (1, 2) is trisected at the points P and Q. If the co-ordinates of P and Q are (p, –2) and (5/3, q) respectively. Find p and q. Q16. Determine ratio in which the point P(m, 6) divides the join of A(–4, 3) and B(2, 8). Also find m. Q17. Prove that the four points whose co-ordinates are (0, 5), (–2, –2), ( 5, 0) and (7, 7) form rhombus. Q18.Prove that (–5, 6), (3, 0) and (9, 8) are the vertices of an isosceles right-angled triangle. Q19. The co-ordinates of the mid points of the sides of a triangle are (1, 1) , (2, –3) and (3, 4). Find The co-ordinates of its centroid. Q20.If two vertices of an equilateral triangle are (0, 0) , ( 3,√3 ), find the third vertex. Q21. Find the lengths of the medians of a ∆ABC whose vertices are A (7, –3) , B (5, 3) and C (3, –1). Q22. The line joining the points (2, 1) and (5, 8) is trisected at the points P and Q. If point P lies on the line 2x – y + k = 0, find the value of k. Q23. If the point (x, y) is equidistant from the points (a+ b , b –a) and (a – b, a + b), prove that bx = ay. Answers Ans 1.(7/4, 7/8) Ans2. (5, –4) and (6, 0) Ans3. 2:1 Ans4. 3:4 Ans5.( –3, 5) Ans6. (a) 2:3 and (0, 1)(b) 1: 2 Ans7.65 and (1/3, 5/3) Ans8. (a) (0, 1) , (6, 3) and ( 2, 5)(b) (1,3) , (5, 5) and ( 3, –3) Ans9.(a) (1, –2)(b) (3, 2) Ans10. (–1, 3) Ans11. (1, 2) Ans12. (–3, 3/2) , (–2, 3) and (–1, 9/2) Ans13. 5 or –3 Ans14. 3 Ans15. p = 7 /3 and q = 0 Ans16. 3:2 , m =–2/5 Ans19. (2, 2/3) Ans20.(0,2√3 ) or (3, -√3) Ans21. 5, 5,√10 Ans 22. –8 Q1 A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of60°with the wall, find the height of the wall. (7.5 √3 )
Q 2 A pole 12 m high casts a shadow 4 √3 m long on the ground. Find the angle of elevation (60°) Q 3 The angle of elevation of the top of a tower from a point on the ground is 30° if on walking 30m towards the tower, the angle of elevation becomes 60°.Find the height of the tower.(15√3 ) Q 4 An observer 1.5m tall is 20.5m away from a tower 22m high. Determine the angle of elevation of the top of the tower from the eye of the observer. (45°) Q 5 An aero plane when flying at a height of 5000m from the ground passes vertically above another aero plane at an instant when the angles of the elevation of the two planes from the same point on the ground are 60° and 45° respectively. Find the vertical distance between the aero planes at the instant. (2116.5m) Read more » Download More Test paper 10th_heights_and_distances_test_paper_1 Download File 10th_application_of_trigonometry _Test paper -2 Download File |
