Important Questions Class 9 Science Chapter 12 PDF Download
Ananya Gupta22 Oct, 2024
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Important Questions Class 9 Science Chapter 12: In Chapter 12 of Class 9 Science titled Improvement in Food Resources covers important concepts related to agriculture, livestock management, and the ways to enhance food production.
Important questions from this chapter focus on the various methods of crop production including traditional and modern agricultural practices, as well as the role of fertilizers, pesticides and irrigation in improving crop yields. Students are advised to understand the significance of sustainable practices and innovations in agriculture to ensure food security for the growing population. Practicing these important questions can help reinforce key concepts and prepare students for their exams effectively.Important Questions Class 9 Science Chapter 12 Overview
The important questions for Class 9 Science Chapter 12 Improvement in Food Resources are prepared by subject experts of Physics Wallah to help students grasp the important concepts of this chapter effectively. By working through these questions students can deepen their understanding of food resource management and develop a comprehensive knowledge base that is crucial for their exams. This approach not only aids in revision but also develop critical thinking about food production and its impact on society.CBSE Important Questions Class 9 Science Chapter 12 PDF
The PDF containing important questions for Class 9 Science Chapter 12 Improvement in Food Resources is available below. This resource is created to help students in their preparation for exams by providing a collection of key questions that cover the chapter's main concepts. By accessing this PDF students can practice and reinforce their understanding of essential topics, such as agricultural practices, crop management and advancements in food production techniques.Important Questions Class 9 Science Chapter 12 PDF
Important Questions for CBSE Class 9 Science Chapter 12 Improvement in food Resources
Here we have provided Important Questions for CBSE Class 9 Science Chapter 12 Improvement in food Resources-Q.1. What do we get from cereals, pulses, fruits, and vegetables?
Ans: Cereals give us carbohydrates, which provide energy. Pulses are a source of proteins, which help in building and repairing tissues. Fruits and vegetables supply vitamins and minerals that are essential for our health.
Q.2. What factors may be responsible for losses of grains during storage?
Ans: Grain losses during storage can happen due to both living and non-living factors. Non-living factors include the moisture level and temperature of the environment. Living factors include animals like rats and insects, as well as bacteria and fungi, which can damage the grains.
Q.3. What are weeds? Give two examples.
Ans: Weeds are unwanted plants that grow in crop fields and compete for resources. Examples of common weeds are Amaranthus and Chenopodium.
Q.4. What is crop rotation?
Ans: Crop rotation is a farming method where different crops are planted in the same field in a planned order. This helps maintain soil health and improves crop yields.
Q.5. What are drones?
Ans: Drones are flying devices used in farming to help increase crop production. They assist farmers in monitoring crop growth and managing resources like water, fertilizers and seeds, making farming more efficient.
Q.6. What is pasturage and how is it important?
Ans: Pasturage refers to the land where animals graze for food. It is important because it provides natural feed for livestock, promoting their health and growth.
Q.7. What is a layer and a broiler? What are the differences between the two?
Ans: A layer is a type of chicken raised for producing eggs, while a broiler is raised for meat. Layers require different care, including special housing and feed, compared to broilers, which need a diet rich in protein and vitamins.
Q.8. Arrange the following statements in correct sequence of preparation of green manure:
Ans:
(b) Green plants are cultivated for preparing manure or crop plant parts are used. (c) Plants are ploughed and mixed into soil. (a) Green plants are decomposed in soil. (d) After decomposition, it becomes green manure.Q.9. What are the benefits of poultry farming over cattle farming?
Ans: Poultry farming has several advantages over cattle farming:
a) It requires less money to start. b) It needs less space. c) It's easier to manage. d) You can get quicker returns on your investment.Q.10. Define intercropping. Mention its advantages.
Ans: Intercropping is the practice of growing two or more crops in the same field at the same time.
Advantages include:
Increased productivity. Efficient use of space and time. Helps maintain soil fertility.Q.11. What are the advantages of organic farming?
Ans: Organic farming has several benefits:
a) It does not harm the environment. b) It helps keep the soil fertile. c) It avoids using harmful chemicals that can affect living things. d) It reduces pollution of air, water, and soil.Q.12. Differentiate between mixed cropping and intercropping.
Ans:
Mixed cropping is when multiple crops are grown together in the same field without a specific pattern. Intercropping is when two or more crops are grown in specific rows at the same time.Q.13. Give a difference between Rabi and Kharif crops.
Ans:
Rabi crops are sown in winter and harvested in spring, like wheat and barley. Kharif crops are sown with the onset of the monsoon and harvested in autumn, like rice and cotton.Q.14. What is hybridization?
Ans: Hybridization is the process of crossing two different plant varieties to create a new one. This new plant usually has desirable traits, such as better yield or resistance to diseases.
Q.15. List the various methods of weed control.
Ans: Weed control methods include:
a) Mechanical methods: Pulling out weeds by hand or using tools like hoes. b) Cultural methods: Using practices like proper seed bed preparation and crop rotation to prevent weeds. c) Chemical methods: Using herbicides like 2,4-D to kill weeds.Q.16. What are the characteristic features of ideal shelters for cattle?
Ans: Ideal shelters for cattle should:
Protect animals from rain, heat, and cold with a good roof. Have a sloped floor for easy cleaning and to keep the area dry. Provide access to clean drinking water. Have a proper system for disposing of waste.Q.17. What are the hazards of using fertilizers?
Ans: Using fertilizers can lead to:
a) Reduced soil quality by lowering organic matter and harming soil structure. b) Eutrophication, where excess nitrates from fertilizers wash into water bodies, causing harmful algae growth.Q.18. How do insects and pests damage crop plants?
Ans: Insects and pests can damage plants in several ways:
a) They chew on roots, stems, and leaves. b) They suck the sap from different parts of the plant. c) They eat fruits and seeds. d) They cause growths called galls. e) They consume stored grains.Q.19. How do biotic and abiotic factors affect crop production?
Ans: Biotic factors, which are living things, can either help or harm crop production. For example, beneficial insects like honey bees help with pollination, while pests such as insects and rodents can damage crops. Abiotic factors are non-living elements like soil, water, air, and climate conditions. Good weather, including the right temperature and humidity, along with healthy soil and water availability, helps crops grow better and increases their yield.
Q.20. What are the desirable agronomic characteristics for crop improvements?
Ans: Desirable traits for improving crops include:
(i) Dwarf plants in cereal crops, as they require fewer nutrients and are less likely to fall over. (ii) Tall and bushy plants in fodder crops, which provide more leaves for animal feed.Benefits of Practicing Important Questions Class 9 Science Chapter 12
Enhanced Understanding: Reviewing important questions helps students reinforce their understanding of key concepts related to food production, crop management and animal husbandry. This deeper comprehension helps in grasping the subject matter more effectively.
Exam Preparation: Focusing on important questions prepares students for examinations by familiarizing them with the types of questions they may face. It builds confidence and reduces anxiety, as students feel more equipped to tackle the exam.
Critical Thinking Skills: Answering important questions encourages students to think critically about the subject. They learn to analyze problems, evaluate solutions and apply their knowledge to real-world scenarios, which enhances their analytical abilities.
Time Management: Practicing a set of important questions allows students to improve their time management skills. They learn how to allocate time efficiently for each question, ensuring they complete their exams within the allotted time.
Identifying Weak Areas: By working through important questions, students can identify topics or concepts they may struggle with. This awareness allows them to focus their study efforts on specific areas that need improvement, leading to a more targeted and effective study strategy.
Boosting Retention: Repeatedly practicing important questions reinforces memory retention. The more students engage with the material, the better they remember key concepts, terms and processes related to food resources.
Important Questions Class 9 Science Chapter 12 FAQs
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