water Introduction
Key Notes :
- What is Water?
- Water is a transparent, tasteless, and odorless liquid.
- It is one of the most essential substances for life on Earth.
- Composition of Water:
- Water is made up of two hydrogen atoms and one oxygen atom, chemically written as H2O.
- It has a unique structure with a bent shape.
- Importance of Water:
- Water is crucial for all living organisms, including humans, animals, and plants.
- It is used for drinking, cooking, cleaning, and various industrial processes.
- The Water Cycle:
- The water cycle is a continuous process in which water evaporates from the Earth’s surface, forms clouds, and then falls back to the surface as precipitation (rain, snow, sleet, etc.).
- This cycle is essential for the planet’s climate and the availability of freshwater.
- States of Water:
- Water can exist in three states: solid (ice), liquid (water), and gas (water vapor).
- Changes in temperature cause water to change its state.
- Properties of Water:
- Water has a high specific heat capacity, which means it can absorb and release a lot of heat without changing temperature quickly. This property is vital for regulating Earth’s climate and supporting life.
- Water in Nature:
- Water is found in oceans, rivers, lakes, and underground aquifers.
- It covers about 71% of Earth’s surface.
- Conservation of Water:
- It’s crucial to conserve water because it’s a finite resource.
- Simple actions like fixing leaks, taking shorter showers, and turning off the tap when not in use can help conserve water.
- Water Pollution:
- Water can become polluted by the introduction of harmful substances like chemicals, plastics, and waste.
- Pollution can harm aquatic ecosystems and affect the safety of drinking water.
- Access to Clean Water:
- Unfortunately, not everyone in the world has access to clean and safe drinking water.
- Access to clean water is a global challenge, and efforts are being made to improve this situation.
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