Water and Life

Question 1

Water molecules are polar, with oxygen having a partial negative charge and hydrogen a partial positive charge. This allows water to form hydrogen bonds, which give it unique properties.

Answer 1

Polarity of Water

Question 2

Water molecules stick to each other, contributing to surface tension. aiding in water transport

Answer 2

(capillary action)

Question 3

Water can absorb or release a significant amount of heat without a large change in temperature, helping to regulate temperature in organisms and environments.

Answer 3

High Specific Heat

Question 4

As water evaporates, it absorbs heat, cooling the surface (e.g., sweat evaporating from skin).

Answer 4

Evaporative Cooling

Question 5

Water is known as the “universal solvent” because it dissolves many substances, enabling chemical reactions to occur in biological systems.

Answer 5

Solvent Properties

Question 6

Ice is less dense than liquid water, allowing it to float. This insulates aquatic ecosystems in cold climates.

Answer 6

Ice density