Human Environment & Settlement
The environment is everything that surrounds and affects us. It has two parts. The natural environment consists of all things that come from nature and were not made by humans - land, water, air, plants and animals (the lithosphere, hydrosphere, atmosphere and biosphere). The human-made environment includes everything people have built or created - buildings, roads, bridges, parks, monuments and industries. There is also the human environment, which refers to people themselves and their interactions, ideas and activities. Human beings modify the natural environment to meet their needs, and a healthy balance between the two is essential. Settlements are places where people build their homes and live. They began near river valleys where fertile land and water were available. Settlements are of two broad types. Rural settlements are villages where most people depend on farming, fishing, forestry or other primary activities; they are usually less densely populated. Urban settlements are towns and cities where most people work in secondary and tertiary activities such as manufacturing, trade and services; they are densely populated. Settlements may also be permanent (people live there for long periods) or temporary (occupied for a short time, like the homes of nomadic herders). Transport is the means by which people and goods move from one place to another, and its four major modes are roadways, railways, waterways and airways. Communication is the passing of information; it ranges from older forms like letters to modern mass communication through the internet, telephone, radio and television, and satellites have made instant global communication possible.
✅ Solved examples
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📝 Topic test — 8 questions
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Key Concepts — Quick Reference
Earth facts to remember cold
| Earth's shape | Geoid - slightly flattened at the poles, bulging at the Equator |
|---|---|
| Rotation | Spins west to east on its axis in ~24 hours -> causes day and night |
| Revolution | Orbits the Sun in ~365.25 days; axial tilt 23.5 degrees -> causes seasons |
| Equator | 0 degrees latitude; divides Earth into Northern & Southern Hemispheres |
| Prime Meridian | 0 degrees longitude; passes through Greenwich (London) |
| IST | Indian Standard Time is fixed on 82.5 degrees E longitude |
Environment & resources facts
| Atmosphere layers | Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere (bottom to top) |
|---|---|
| Air composition | Nitrogen ~78%, Oxygen ~21%, others (CO2, argon, etc.) ~1% |
| Water distribution | About 71% of Earth is water; ~97% is salty ocean water |
| Four major landforms | Mountains, Plateaus, Plains (and the broader category of valleys/basins) |
| Renewable resource | Replenishes naturally (solar, wind, water); Non-renewable is finite (coal, petroleum) |