Definitions [2]
Define Hydrosphere.
The hydrosphere is the total amount of water present on the earth which includes water on the surface, under the ground, and in the air. The hydrosphere is in the form of liquid, vapour, and solid (ice).
Atmosphere:
The envelope of air around the Earth is called the atmosphere. It is composed of nitrogen, oxygen, water vapour, and carbon dioxide, with other gases present in small quantities. The atmosphere is like a protective blanket that keeps our planet safe and helps support life.
Key Points
Key Points: Sources of Water
- Water resources include surface water (rivers, lakes, ponds) and groundwater (water stored below the earth).
- 97% of Earth’s water is saline (oceans); only 0.03% is available as fresh surface water for direct use.
- Surface water mainly comes from rainfall and melting of glaciers, but is easily polluted.
- Groundwater forms by percolation of rainwater and is stored in aquifers; it is the largest usable freshwater source.
- India depends on monsoon rains, and proper water management is essential for agriculture and economic growth.
