Important Question Answers for the Class 9-Social Science Chapter 3- The Dynamic Atmosphere and Changing Climate ***************************** Very Short Answer Type Questions: 1. Which layer of the atmosphere contains the ozone layer? Answer: The stratosphere contains the ozone layer. 2. Name the gas that makes up the highest percentage of the atmosphere. Answer: Nitrogen makes up the highest percentage of the atmosphere. 3. Which element of weather is measured using a barometer? Answer: A barometer is used to measure atmospheric pressure . 4. What is the normal duration of the southwest monsoon in India? Answer: The southwest monsoon usually lasts from June to September . 5. Which season in India is known as the “hot weather season”? Answer: The summer season is known as the hot weather season. 6. Name the process by which water vapour turns into clouds. Answer: The process is called condensation . 7....
Important Question Answers for the Class 9-Social Science Chapter 2- Landforms: Earth's Living Canvas ***************************** Very Short Answer Questions: ************************** 1. Define plate tectonics. Answer:- Plate tectonics is the theory that the Earth's lithosphere is divided into plates that move slowly over time. 2. Name the 3 main layers of the earth. Answer:- The 3 main layers are * Crust * Mental * Core 3. What is weathering? Answer:- Weathering is the breaking of rocks into smaller pieces at the same place. 4. What is erosion? Answer:- Erosion is the removal and transportation of weathered material from one place to another. 5. Name two agents of erosion. Answer:- * Rivers * Wind 6. What is a glacier? Answer:- A glacier is a large mass of moving ic...