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 Class 9 – Chapter 3: Atmosphere and Climate https://link.amazon/B01vdn9oG 1. Atmosphere:-  The atmosphere is the blanket of air surrounding the Earth. Held by Earth's gravity. Essential for life because it: Provides oxygen. Protects Earth from harmful UV rays. Maintains Earth's temperature. Controls weather and climate. 2. Composition of Atmosphere:-  Gas Percentage Nitrogen 78% Oxygen 21% Argon 0.93% Carbon dioxide 0.04% Other gases 0.03% Other Components Water vapour (0.1–0.4%) Dust particles Importance Nitrogen helps plant growth. Oxygen supports life. Carbon dioxide is used in photosynthesis. Water vapour forms clouds and rainfall. Altitude:-   The height of a locationabove mean sea level is called altitude. Usually mesured in meteres or feet. The mean sea level is considered zero. 3. Layers of the Atmosphere (i) Troposphere Height: 0–12 km Weather changes occur here. Contains air, clouds and water vapour. Temperature decreases with height. Trop...

Chapter 2: Shaping of the Earth's Surface – Worksheet Section A: Multiple Choice Questions (MCQs) 1. Which of the following is an example of an internal (endogenic) force? A) Weathering B) Wind erosion C) Volcanic eruption D) Coastal deposition 2. The theory of plate tectonics, explaining the movement of the Earth's crust, was proposed by: A) Alfred Wegener B) W. J. Morgan C) James Hutton D) Charles Lyell 3. The semi-molten layer located just below the lithosphere that enables tectonic plates to move is the: A) Crust B) Core C) Asthenosphere D) Mantle core boundary 4. At which type of plate boundary is new crust formed due to rising magma? A) Convergent boundary B) Divergent boundary C) Transform boundary D) Subduction boundary 5. What is the key difference between weathering and erosion? A) Weathering involves the movement of rocks, while erosion does not. B) Weathering breaks rocks in place, while erosion involves the transportation of materials. C) Weathering only occurs in ...

 Chapter 2: Shaping of the Earth's Surface –  https://drive.google.com/file/d/1Guq-qwATmy_VrVWZiGnVp3tTUHam-U47/view?usp=drive_link 1. Introduction:-  What Shapes the Earth's Surface? The Earth's surface is not fixed. It is continuously changing due to the action of powerful internal and external forces. Two Main Types of Forces A. Internal (Endogenic) Forces:- These forces originate inside the Earth. They cause: Formation of mountains Earthquakes Volcanoes Folding and faulting B. External (Exogenic) Forces:- These forces act on the Earth's surface. They include: Weathering Erosion Deposition They slowly wear down and reshape landforms. Why is this chapter important?  Understanding the Earth's surface helps us: Explain earthquakes and volcanoes. Understand how mountains and plains are formed. Identify disaster-prone regions. Appreciate the dynamic nature of the Earth. 2. Plate Tectonics:-  Plate Tectonics is a theory proposed by W. J. Morgan that explains the m...

Class 10 English Unseen Passage – 1 Quiz Class 10 English Unseen Passage – 1 Reading Comprehension (Discursive Passage) Passage Reference: In today's digital world, students have access to unlimited information through the internet. Online learning platforms, educational videos, and e-books have made learning easier than ever before. However, having access to information does not always mean gaining knowledge. Knowledge develops only when students understand, analyze, and apply what they learn in real-life situations. Q1. What is the central idea of the passage? A. Students should stop using technology. B. Technology is useful only for entertainment. C. Technology should support learning but not replace independent thinking. D. Printed books are no longer useful. Nex...

Class 3 English Grammar Quiz Part 1: Level 1 Question 1 of 50 Score: 0 Loading question... Previous Next 🌟 Quiz Completed! Your Final Score 0 / 50 0% Processing your results... Try Again