Ursuline Convent Sr. Sec. School. Biology

Transcription

1 Ursuline Convent Sr. Sec. School Class IX : Holiday Homework : Session : Biology Q1. Read and prepare chapter 5(fundamental unit of life) for U.T. Q2. Read chapter 15 (Improvement in food resources) thoroughly and complete all the questions given in your class in notebook. Q3. Get an idea for a working model of Biology for Science exhibition. Q4. Complete the following flowcharts with appropriate word/sentence. Cell Organelles Endoplasmic reticulum Mitochondria Plastids 3. Has ribosomes attached to membranes No ribosomes attached to membranes Packaging of plastids Suicide bags of cells Not present in 6. Storage sacs for solid or liquid contents Produce ATP 9. Known as Have their own 10. Produces 7. Produces 8. Flowchart-1

2 Flowchart-2 Improvement in Food Resources Improvement in Crop yields Crop Production Management 3. Hybridisation 4. Protection against biotic and abiotic factors during storage Irrigation 6. Cropping Patterns Macro - nutrients 9. Inter cropping Mixed Cropping Wells Tanks River lift system Manure 12. Green manure 11.

3 ह द 1. क त क प ठ य प स क क सभ प ठ पढ़ और य द कर 2. य ट १ क ससल बस प र कर और य द कर 3. पढ़ य गय सभ क म क प म प र कर 4. व य करण क सभ प ठ स एक एक व क श ट (२० म र कसक ) क बन ए और क प म प स ट कर थ ल कर 5. सभ प रश न उत तर उत तर प स स क म कर Physics a. Home assignment practise sheet 1. A train accelerates from 36 km/h to 54 km/h in 10 sec. (i) Acceleration (ii) The distance travelled by car 2. A body whose speed is constant (a) Must be accelerated (b) Might be accelerated (c) Has a constant velocity (d) cannot be accelerated. 3. A truck traveling at 54 km/h is slow down to 36 km/h in 10 sec. Find the retardation 4. Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give an example of a body in uniform acceleration. 5. Find the total displacement of the body from the following graph: 6. A car travels at 54 km/h for first 20s, 36 km/h for next 30s and finally 18 km/h for next 10s. Find its average speed.

4 7. Define acceleration and give its SI unit. When is acceleration of a body negative? Give two examples of situations in which acceleration of the body is negative. 8. Distinguish between uniform motion and non uniform motion. Is uniformly accelerated motion uniform motion? Give one example each of uniform and non-uniform motion. 9. Define uniform circular motion and give example of it. Why is it called accelerated motion? 10. State which of the following situations are possible and give an example of each of these:- (a) A body moving with constant acceleration but with zero velocity. (b) A body moving horizontally with acceleration in vertical direction. (c) A body moving with a constant speed in an accelerated motion. 11. A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car. 12. Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.6 seconds, what will be his final velocity and how far will he fall? 13. A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car and the distance travelled. 14. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon. 15. Rocket-powered sleds are used to test the human response to acceleration. If a rocketpowered sled is accelerated to a speed of 444 m/s in 1.8 seconds, then what is the acceleration and what is the distance that the sled travels? 16. A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Determine the acceleration of the bike. 17. An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s 2. The take-off speed for this plane will be 65 m/s. assuming this minimum acceleration, what is the minimum allowed length for the runway? 9. A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car). 18. A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of m. Determine the acceleration of the bullet. 19. A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before it reaches its peak. (Hint: the time to rise to the peak is one-half the total hang-time.)

5 b. Collect the topic, material required and theory of working models of science. c. Solve the worksheet of motion in physics notebook. Chemistry a. Collect the topic, material required and theory of working models. b. Home assignment practise sheet Q.1 - Define matter. Q.2 - what happens if you put copper sulphate crystals in water? Q.3 - A substance has a definite volume but no definite shape? State whether this substance is a solid, a liquid or a gas. Q.4 - Arrange the following substances in increasing order of force of attraction between the particles. (a) Milk (b) Salt (c) Oxygen. Q.5 - A substance has neither a fixed shape nor a fixed volume. State whether it is a solid, a liquid or a gas. Q.6 - The melting point of a substance is below the room temperature. Predict its physical state. Q.7 - What is vapour? Q.8 - Name the temperature at which the solid and liquid states of substance can exist together. Q.9 - What is the effect of pressure on boiling point? Q.10 - Name any two substances which sublime. Q.11 - Define Condensation. Q.12 - For any substance, why does the temperature remain constant during the change of state? Q.13 - Which is the slow process, Evaporation or Boiling? Q.14 - State the effect of surface area on rate of evaporation. Q.15 - Why are we able to sip hot tea faster from saucer rather than from a cup? Q.16 - What is the SI unit of temperature? Q.17 - Kelvin scale of temperature is regarded as better scale than Celsius. Why? Q.18 - Convert 10oC into Kelvin scale. Q.19 - Pressure on the surface of a gas is increased. What will happen to the inter particle forces? Q.20 - A gas can exert pressure on the walls of the container. Assign reason.

6 Mathematics a. Solve the given worksheets of polynomials, number system and co-ordinate geometry. b. Practise all N.C.E.R.T questions of polynomials, number system, and co-ordinate geometry. c. Prepare a card game for number system representing pair of real no, whole no, rational and irrational no, integers. It can be of any style with your innovation. Do the following in a scrap book 1. PROJECT WORK Social Studies I. Collect more information & picture about various endangered spacies from news paper,and magazine II. Find out various steps taken by the government to protect them III. Describe how you can contribute to protection flora and fauna of our country India. 2. Solve the crossword puzzle of page no 16 & 25 geography book 3. Prepare quiz question bank from the following lessons (20 questions each ) i. The French Revolution ii. India size and location iii. What is democracy? Why democracy? iv. The story of village Palampur English 1. Factual Description On Board Q4. On Pg Story Writing - On Board Q1. On Pg Gap Filling - On Board Q4, Q.5 On Pg Sentence Reordering - On Board Q19, Q20 On Pg Read Chapters 1-5 of the Novel Three Men in a Boat and write the summary of each chapter. Computer Prepare an HTML webpage on any Topic using all the Tags included in the chapters

7 HTML - Part 1 and HTML Part 2 of the UT Syllabus. Submit the same in a CD.