why is water essential for life? complete the table. property description importance to life polarity positively charged hydrogen atoms of water are attracted to negatively charged oxygen atoms of other water molecules ice is less dense than liquid water. lots of heat is needed to increase the temperature of water. biology, part 1 module 2 content guide property description importance to life heat of vaporization

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# Brief Explanations:
Water's polarity allows it to form hydrogen - bonds, which is crucial for many biological processes. The property described as positive hydrogen atoms attracted to negative oxygen atoms of other water molecules is hydrogen - bonding. This leads to ice being less dense than liquid water, which is important for aquatic life as it allows ice to float and insulate water bodies in cold climates. High heat of vaporization means water can absorb a lot of heat before evaporating, helping organisms regulate body temperature. Water's status as a universal solvent enables the transport of nutrients and waste in living organisms.
- For polarity:
  - Description: Water molecule has a partial positive charge on hydrogen and partial negative charge on oxygen due to unequal electron - sharing.
  - Importance to Life: Facilitates hydrogen - bonding, which is essential for protein and DNA structure and function, and also for water's cohesive and adhesive properties important in plant water transport.
- For the property of hydrogen - bonding (the given description in the table):
  - Property: Hydrogen - bonding.
  - Importance to Life: As mentioned, ice floating protects aquatic life in winter. Also, hydrogen - bonding affects water's high surface tension which is beneficial for some organisms like insects that can walk on water.
- For high heat of vaporization:
  - Property: High heat of vaporization.
  - Importance to Life: Evaporative cooling in organisms (e.g., sweating in humans) helps maintain a stable internal temperature.
- For universal solvent property:
  - Property: Universal Solvent.
  - Description: Water can dissolve many substances, including salts, sugars, and gases.
  - Importance to Life: Enables transport of nutrients, gases (like oxygen and carbon - dioxide) and waste products in biological systems.

# Answer:
| Property | Description | Importance to Life |
|--|--|--|
| Polarity | Water molecule has a partial positive charge on hydrogen and partial negative charge on oxygen due to unequal electron - sharing. | Facilitates hydrogen - bonding, crucial for protein and DNA structure and function, and for water's cohesive and adhesive properties important in plant water transport. |
| Hydrogen - bonding | Positively charged hydrogen atoms of water are attracted to negatively charged oxygen atoms of other water molecules | Ice is less dense than liquid water, protecting aquatic life in winter; affects water's high surface tension beneficial for some organisms. |
| High Heat of Vaporization | Lots of heat is needed to increase the temperature of water and to turn it into vapor. | Evaporative cooling in organisms helps maintain a stable internal temperature. |
| Universal Solvent | Water can dissolve many substances, including salts, sugars, and gases. | Enables transport of nutrients, gases and waste products in biological systems. |

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Answer:

Property	Description	Importance to Life
Hydrogen - bonding	Positively charged hydrogen atoms of water are attracted to negatively charged oxygen atoms of other water molecules	Ice is less dense than liquid water, protecting aquatic life in winter; affects water's high surface tension beneficial for some organisms.
High Heat of Vaporization	Lots of heat is needed to increase the temperature of water and to turn it into vapor.	Evaporative cooling in organisms helps maintain a stable internal temperature.
Universal Solvent	Water can dissolve many substances, including salts, sugars, and gases.	Enables transport of nutrients, gases and waste products in biological systems.