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Chapter - 3 The Dynamic Atmosphere and Changing Climate (Class- 9)

Bhupendra Rawat -
Chapter - 3   The Dynamic Atmosphere and Changing Climate What is Atmosphere:-  The atmosphere is a layer of gases that surrounds the Earth. It is made up of gases like Nitrogen (78%), Oxygen (21%), and small amounts of Carbon dioxide, Argon, and Water vapour. It protects life on Earth and makes it possible for living organisms to survive. Why is the Atmosphere Important:-  The atmosphere plays a very important role: Provides Oxygen – Needed for breathing by humans and animals. Supports Life – Plants use carbon dioxide for photosynthesis. Protects Earth – Shields us from harmful rays of the Sun. Maintains Temperature – Keeps Earth warm enough for life (greenhouse effect). Weather Formation – Clouds, rain, wind, and storms happen in the atmosphere. What is Climate:-  Climate is the average weather condition of a place over a long period of time (years or decades). It includes temperature, rainfall, humidity, and wind patterns. Importance of Climate Affects Agricu...
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Worksheet: Geography (Class 9) Chapter 2 – Shaping of the Earth

Bhupendra Rawat -
 Worksheet: Geography (Class 9) Chapter 2 – Shaping of the Earth Section A – Very Short Answer (1 mark each) (Answer in one or two sentences) What is meant by shaping of the Earth? Name the two main types of forces responsible for shaping the Earth. What are endogenic forces? What are exogenic forces? Which is the outermost layer of the Earth? What is the main composition of the core? What are tectonic plates? Define weathering. Define erosion. Name any one agent of erosion. Section B – Short Answer (2–3 marks each) Differentiate between internal and external forces. Write any two characteristics of the crust. Explain the role of convection currents in the mantle. What happens at a divergent boundary? What is a convergent boundary? Explain physical weathering with an example. How do rivers cause erosion? What are glaciers? How do they shape landforms? Write any two differences between weathering and erosion. What are coastal landforms? Section C – Long Answer (4–5 marks each) Descr...
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Chapter 4: Early Humans and Beginning of Civilisation | NCERT Notes, MCQs & Important Questions (CBSE 2026–27)

Bhupendra Rawat -
 Class 9 – Chapter 4: Early Humans and Beginning of Civilisation 1. Introduction Human history began millions of years before writing. History before writing is called Prehistory. Knowledge comes mainly from archaeological evidence. Earliest writing systems: Harappan Script (undeciphered) Cuneiform (Mesopotamia) Hieroglyphics (Egypt) Keywords Prehistory Archaeology Harappan Script Cuneiform Hieroglyphics Brahmi Script 2. Why Study Early Human History?  Early human history helps us understand the long process of humankind's biological and cultural evolution in relation to changes in climate and the environment. Biological Evolution:-   It refers to the gradual physical and genetic changes through early ancestors. Early ancestors known as australopithecines ( australis means souther and pithecus is primates) Physical development from early ancestors to Homo sapiens. Cultural Evolution:- It refers ow human adapted to their surrounding during the Quaternary Period. Developmen...
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Chapter 5 State and Society up to 1000 CE Worksheet | NCERT MCQs, Case-Based Questions & Answers (CBSE 2026–27)

Bhupendra Rawat -
Worksheet – Chapter 5: State and Society up to 1000 CE Section A: Competency-Based MCQs 1.Which sequence correctly shows the evolution of political organisation in ancient India? A. Janapada → Family → Kingdom → Empire B. Family → Village → Clan → Empire C. Family → Jana → Janapada → Mahajanapada D. Empire → Mahajanapada → Janapada → Jana 2.A society mainly differs from a state because a society is primarily based on A. military power B. written constitution C. customs and traditions D. taxation 3.Which Veda is considered the oldest literary source of ancient Indian history? A. Sama Veda B. Atharva Veda C. Yajur Veda D. Rig Veda 4.A student wants to study ancient Indian music. Which Veda should the student study first? A. Sama Veda B. Atharva Veda C. Rig Veda D. Yajur Veda 5.The Upanishads mainly deal with A. military training B. philosophical knowledge C. agricultural techniques D. trade regulations 6.Which political institution represented a large public assembly during the Vedic Per...
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