202110204-APEX-STUDENT-WORKBOOK-BIOLOGY-G09-PART2

PROJECT BASED QUESTIONS —— Project Based Questions —— (i) Visit a few farms in a village and collect the details of i. Food grains cultivated ii. Irrigation methods which are followed iii. Fertilizers and manures used iv. Method they follow to protect the crops. Write a report on which you have observed. Compare the farms based on all the factors above and conclude which farm will get the highest yield and why? (ii) Visit a nearby soil testing center and collect the information from the scien- tist/technician on methods and techniques used for soil testing. Also write a note on different metals present in the contaminated soil. (iii) You are asked to give a seminar on “Soil pollution–Cause, Effects, and Control mea- sure”. How would you prepare for the topic? What points would you include? Write a synopsis about the topic. (iv) Nitrogen cycle is a complex biogeochemical cycle. Take the help of internet or library book to make a collage with pictures which shows the detailed explanation of Nitrogen cycle. Project Based Questions 99

Additional AS- Based Practice Questions Chapter 8: Challenges in Improving Agricultural Products Q1. Describe the role of water in crop production. (AS7) Q2. Observe the table below showing rate of growth of population and food grain production and answer the given questions. (AS4) i. What does the table tell about food production in last 50 years? ii. Is production of food and growth of population growing at equal rate? iii. What conclusion can you draw about availability of food in year 1961-1971 and in 2001-2011? Q3. Which of the following conditions will give the most benefits? Why? (AS4) (a) Farmers use high-quality seeds, do not adopt irrigation or use fertilizers. (b) Farmers use ordinary seeds, adopt irrigation and use fertilizer. (c) Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures. Q4. Write brief procedure undertaken in crop production to ensure high yield. (AS3) Q5. How will you prepare panchgavya at home? Write its procedure in details. (AS3) Chapter 9: Adaptations in Different Ecosystems Q1. Diagrammatically represent adaptation of plants in desert ecosystem. (AS5) Q2. Draw different zones of marine ecosystem. (AS5) Q3. Which zone in aquatic ecosystem is appreciated for maximum photosynthetic activity? (AS6) Q4. List out various terrestrial adaptation which you see in nature. (AS7) Q5. Why are green plants not found beyond certain depths in the ocean? (AS7) Additional AS-Based Practice Questions 100

Chapter 10: Soil Pollution Q1. With the help of pie chart show the distribution of different components of soil. (AS5) Q2. What do you understand by bio magnification? Explain with the help of a diagram. (AS5) Q3. Observe different types of wet and dry waste generated at your home and tabulate your findings. (AS3) Q4. How can you prove experimentally that some of the wastes can be decomposed quickly than others? (AS3) Q5. Name few organisms that are used to remedy environmental problems in soil. (AS4) Q6. How are earthworm a valuable creature for agriculturalists? (AS6) Q7. Why soil conservation is necessary for sustaining life on earth? (AS6) Q8. Read the statement and answer the following questions. “Soil erosion occurs when the weathered rock particles are dislodged and carried by wind or water” i. Mention the factors responsible for soil erosion. ii. What are the consequences of soil erosion? iii. Mention two measures to prevent soil erosion. Chapter 11: Bio geo chemical Cycles Q1. Do you know any of the human activity which may be polluting water sources on earth? (AS4) Q2. Carbon dioxide is essential for plants they why we consider it as a pollutant? (AS2) Q3. A motor car, with its glass totally closed is parked directly under sun. The inside temperature of car rises very high. On the basis of information and your understanding on greenhouse effect, provide suitable explanation for the same. (AS4) Q4. With the help of a well labeled diagram show the presence of ozone in the atmosphere. (AS5) Q5. What does the image represent? Describe in details. (AS5) Additional AS-Based Practice Questions 101