Chapter Two, Section 2
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Water is essential for life and makes up 71% of the Earth's surface, with oceans helping to distribute heat and drive ocean currents, waves, and tides. The hydrologic cycle involves water evaporating from various sources and surfaces before condensing and falling as precipitation, soaking into the ground or flowing into rivers to be recycled. Different landforms exist both on land and under the oceans, including mountains, plains, canyons, and ridges.
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The document describes the structure and composition of the Earth. It is divided into layers including the crust, mantle, and core. The Earth's temperature increases with depth reaching 4,500°C in the core. The Earth's relief is diverse and formed by tectonic plates that move slowly over the mantle, causing collisions that result in earthquakes and volcanic eruptions. The major forms of land relief include mountains, plains, plateaus, and valleys formed by both internal geological forces and external erosion factors.
Class 7 ch 5 water-pdf
This is PPT of class -7 ,Geography, Chapter -5, Water
Reference book is NCERT, .
This is useful for teachers who teach in CBSE and Chhattisgarh board.
so download and use online and offline teaching.
Chapter nine
The document summarizes key aspects of the hydrologic cycle and Earth's water systems. It describes the hydrologic cycle as a series of interconnected water storage areas and transfer processes. It discusses the oceans, which contain over 97% of Earth's water, and how ocean waters vary in salinity, temperature, and density around the world. It also outlines various freshwater storage areas like lakes, rivers, groundwater, and glaciers, and how humans have impacted some of these systems through activities like irrigation and groundwater extraction.
Geography chapter water class 7 notes
Three-fourths of the Earth's surface is covered in water, causing it to be called the blue planet. The sun's heat causes the water cycle where water evaporates, rises into clouds, condenses, and falls as precipitation onto land and sea. Most of Earth's water is salty ocean water, while a small portion is fresh water found in rivers, lakes, and glaciers. The ocean contains waves, tides, and currents that cause its waters to constantly move.
The sea floor
The Earth is made up of four ocean basins - Pacific, Atlantic, Indian, Arctic - which cover 71% of the planet. The ocean floor is composed of tectonic plates that are constantly shifting and spreading at mid-ocean ridges. As new crust is formed at ridges, old crust is destroyed through subduction at trenches. This process of sea floor spreading and plate tectonics explains continental drift over millions of years, from the single supercontinent Pangaea to the current configuration of lands and oceans.
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Mr. Philen's notes summarize key points from Chapter 2, section 1 of the Earth science textbook. The notes discuss:
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The document discusses several key elements of culture including language, religion, population geography, political geography, urban geography, and economic geography. It provides examples of different ethnic groups, examines how cultures change and exchange ideas, and explores several major world religions including their origins, beliefs, sacred texts, and geographic distributions. Maps are referenced to show patterns in religious populations around the world.
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