Water exhibits unique properties critical for life:
1. High specific heat: Absorbs large amounts of heat with minimal temperature change, stabilizing environmental and organismal temperatures.
2. Universal solvent: Polar nature dissolves many ionic and polar substances, facilitating biochemical reactions.
3. High surface tension: Due to hydrogen bonding, allows insects to walk on water and supports capillary action in plants.
4. Anomalous expansion: Density decreases below 4°C, so ice floats, insulating aquatic ecosystems.
5. High latent heat of vaporization: Requires significant energy to evaporate, aiding cooling via perspiration or transpiration.
6. Cohesive and adhesive properties: Cohesion (water molecules stick together) and adhesion (stick to other surfaces) enable capillary movement in plants.