Earthquakes are sudden vibrations of the Earth’s surface caused by tectonic plate movements, volcanic activity, or human actions. They originate at a focus point and are measured by scales like Richter and Moment Magnitude. Major earthquake zones include the Pacific Ring of Fire. Preparedness and understanding earthquake effects are vital for safety.
Tag: Notes
A volcano is an opening in the Earth’s crust where magma, gases, and ash escape. They can be active, dormant, or extinct, with various eruption types and effects. Key volcanic zones include the Ring of Fire and the Mid-Atlantic Ridge. Volcanoes enrich soil, create land, and pose hazards like lava flows and ash clouds.
What is an Island? Types of Islands 1. Continental Islands 2. Oceanic Islands 3. Coral Islands 4. Barrier Islands 5. Tidal Islands 6. Artificial Islands Major Islands of the World Island Country/Region Special Feature Greenland Denmark Largest island in the world Madagascar Africa Biodiversity hotspot Great Britain UK Historic and economic significance Sri Lanka South […]
Deltas – Notes Exams
A delta is a triangular landform created at a river’s mouth where sediment is deposited, forming numerous distributaries. There are various types, including arcuate, bird’s foot, estuarine, cuspate, and inland deltas. Deltas support agriculture, biodiversity, and human settlements, being significant for economic activities and environmental health.
Valleys – Notes for Exams
A valley is a low area between hills, often created by erosion or tectonic shifts, and can be classified into types such as river, glacial, rift, structural, and hanging valleys. Valleys are significant for agriculture, river systems, human settlements, and biodiversity, supporting various civilizations throughout history.
Deserts are arid regions covering 33% of Earth’s land, characterized by low rainfall (under 250 mm/year) and extreme temperature variations. Types include hot, cold, semi-arid, and coastal deserts, each featuring unique ecosystems. Deserts support specialized flora, fauna, and human life, playing crucial roles in economies and global ecology.
Plains are extensive, flat landforms covering about 55% of Earth’s surface, formed by sediment deposition, erosion, or volcanic activity. They include structural, depositional, and erosional types, crucial for agriculture, settlement, and transportation. Notable examples are the Great Plains and Indo-Gangetic Plain, which support significant economic resources.
Plateaus – Notes Exams
A plateau is a flat, elevated landform formed through volcanic activity, tectonic movements, or erosion. Covering 45% of Earth, plateaus are categorized into intermontane, piedmont, volcanic, dissected, and continental types. They are significant for minerals, agriculture, biodiversity, and tourism, contributing to various economic and ecological systems.
Landforms – Notes for Competitive Exams
Landforms are natural features of the Earth’s surface shaped by internal and external forces, including tectonic activity and erosion. Major types include mountains, plateaus, plains, valleys, deserts, coastal features, and islands. Understanding landforms is essential for studying geography, climate, agriculture, human settlements, and biodiversity.
Mountains are significant natural elevations of the Earth’s surface, covering 25% of land area and influencing climate, biodiversity, and water sources. They can be classified into fold, block, volcanic, residual, and dome mountains, each with distinct characteristics. Mountains play a vital role in tourism, agriculture, and mineral resources.