C S DAV PUBLIC SCHOOL, MOTIHARI HOME ASSIGNMENT (SUMMER VACATION – 2015-16) Class- IX ( Maths) Instruction – Write the answers of the following questions in a separate Note Book meant for Home Assignment. 1. Write the all properties of rational and irrational numbers? 2. Write the difference between expression and equation. 3. Derive the formula for the Zeroes of cubic polynomial. 4. Derive the formula for the Zeroes of quadratic polynomial. Biology CLASS –IX 1. Differentiate prokaryotic cell with eukaryotic cell. 2. Discuss structure and function of cell wall, plasma membrane, mitochondria, golgi complex with appropriate figure. 3.Draw pencil sketch of plant cell and animal cell. CLASS – IX (HISTORY) Question 1. Who was Rousseau? What part did he play in the French Revolution? Question 2. Discuss the causes of the French Revolution? Question 3. What was the contribution of French Revolution to the world history? Question 4. What was the importance of the year 1815? Question 5. How was Church responsible for French Revolution? CLASS – IX (CIVICS) Question 1. Which country supported the military coup in Chile? Question 2. Why did lakhs of people from Myanmar leave their country? Question 3. Why was Suu Kyi, the prominent leader of Myanmar, put under house arrest? Question 4. After Second World War, a chain of events led to democracy. How? Question 5. What do you mean by democracy? Chemistry Q-1How will you justify that ice, water and steam are not different matter but different states of the same matter? Q.2 Define the fourth state of matter? What are its practical uses? Q.3 Explain the inter conversion of three states of matter in terms of forces of attraction between the particles and the kinetic energy of the particles. English Q.1 Q.2 Q.3 Q.4 Write a letter to the editor of the time of India about the importance of education. Write the few lines about the internet What lessons do you learn from the poem "The Brook" Revision of two fictions and two poems and also theme and narrator Physics Q.1 Q.2 Q.3 Q.4 To prepare a project related to zig-zag motion, circular motion and periodic motion. Also write 5 differences between circular motion and periodic motion. State and prove all equation of motion with the help of project method and graphical method. Explain centrepetal force and centrifugal force with the help of project method. Why the centrefugal force is measured in non-inertial framce of refernce. Define frame of refernce. Define speed velocity and accelaration and also prepare a project related to them. Computer Q 1. Describe Nanotechnology? Q 2. What is voice input recognition system? Q3. Draw the flowchart of working of computer system? Geo. Q1. Find out the longitudinal and latitudinal extent of your state. Q.2. Differentiate between strait and pass. Q.3. Why is the difference between the duration of day and night hardly felt at Kanyakumari but not so in Kashmir. Eco. Q.1. What is the difference between multiple cropping and modern farming method? Q.2. What can be done so that more non-farm production activities can be started in village?