Question

Describe how water contributes to the fitness of the environment to support life.

Answer 1

Water contributes to the fitness of the environment to support life by acting as a Solvent for molecules to interact Moderate Earth's climate.

Water contributes to the fitness of the environment to support life in several ways :

• Life on Earth began in water and evolved there for 3 billion years before colonizing the land.
• Even terrestrial organisms are tied to water.
• Most cells are surrounded by water.
• Cells are about 70–95% water.
• Water is a reactant in many of the chemical reactions of life.
• Water is the only common substance that exists in the natural world in all three physical states of matter: solid ice, liquid water, and water vapour.
• Water stabilizes air temperatures by absorbing heat from warmer air and releasing heat to cooler air.
• Water can absorb or release relatively large amounts of heat with only a slight change in its own temperature.
• Water’s high heat of vaporization moderates climate.
• Much of the sun’s heat absorbed by tropical oceans is used for evaporation of surface water.
• Water is unusual because it is less dense as a solid than as a cold liquid.
• Most materials contract as they solidify, but water expands.
• At temperatures above 4°C, water behaves like other liquids, expanding as it warms and contracting as it cools.
• Water begins to freeze when its molecules are no longer moving vigorously enough to break their hydrogen bonds.
• When water reaches 0°C, water becomes locked into a crystalline lattice, with each water molecule bonded to a maximum of four partners.

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