Important Question Answers for the Class 9-Social Science Chapter 3- Atmosphere and 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. What term is...
Important Question Answers for the Class 9-Social Science Chapter 2- Shaping of the Earth's Surface ***************************** The Big Questions: (These questions are as per new textbook) Q1. What shapes the Earth’s surface? Answer:- The Earth’s surface is shaped by two main kinds of forces: 1. Internal forces originate inside the Earth. They are caused by heat and movements within the Earth. 2. They produce: Earthquakes, Volcanic eruptions, Folding, Faulting. These forces build mountains, valleys, plateaus and ocean basins. 3. External forces work on the Earth’s surface. They include: Weathering, Erosion, Transportation, Deposition 4. Running water, sea waves, glaciers, wind and underground water act as agents of change. 5. They wear down high areas and deposit material in low areas. Q2. What is plate tectonics? What are the effects of plate movement? Answer:- 1. Plate tectonics is the theory that the Earth’s outer layer is divided into large and small tecton...