1.8 Water

• What type of bond is formed between oxygen and hydrogen atoms in a water molecule?

  Covalent bond
• Why does water have a high specific heat capacity?

  Hydrogen bonding
• Arrange the properties of water based on their biological importance:

  1️⃣ High specific heat capacity: Stabilizes temperature

  2️⃣ High latent heat of vaporization: Cools organisms

  3️⃣ Cohesion: Forms surface tension

  4️⃣ Adhesion: Moves water in plants
• Match the property of water with its biological importance:

  High specific heat capacity ↔️ Stabilizes environmental temperatures

  High latent heat of vaporization ↔️ Cools organisms through sweating

  Cohesion ↔️ Surface tension and droplet formation

  Adhesion ↔️ Water movement in plants
• The polarity of water molecules makes it an excellent solvent
• The polarity of water molecules is due to oxygen's higher electronegativity
• Water's high latent heat of vaporization allows organisms to cool through evaporation
• What is the role of adhesion in biological systems?

  Water movement in plants
• What type of bond is responsible for cohesion in water?

  Hydrogen bond
• What is the polarity of water molecules due to oxygen's electronegativity?

  Highly polar
• The oxygen atom in a water molecule carries a partial negative charge.


  True
• What allows organisms to cool through sweating?

  High latent heat of vaporization
• Why is water an excellent solvent?

  Polarity and hydrogen bonds
• What two properties of water help regulate body temperature?

  Specific heat and vaporization
• Water transports nutrients to cells and removes waste
• Oxygen molecules are polar due to non-polar covalent bonds between oxygen atoms.

  False
• Cohesion in water is due to hydrogen bonds between water molecules.


  True
• Cohesion allows water molecules to stick together, forming droplets
• Water's high latent heat of vaporization requires a significant amount of heat to evaporate.


  True
• What type of bonds form a water molecule?

  Polar covalent bonds
• Which molecule is non-polar: water, oxygen, or hydrogen?

  Oxygen and hydrogen
• Arrange the following properties of water in terms of their biological importance, from stabilizing internal temperatures to facilitating water movement in plants:

  1️⃣ High specific heat capacity

  2️⃣ High latent heat of vaporization

  3️⃣ Cohesion

  4️⃣ Adhesion
• Water dissolves polar and ionic substances effectively.


  True
• Match the biological function with water's role in maintaining homeostasis:

  Temperature Regulation ↔️ Stabilizes body temperature

  Osmotic Balance ↔️ Maintains solute concentrations

  Transport ↔️ Circulates oxygen and nutrients
• Water molecules are polar due to the higher electronegativity of oxygen
• Water's high specific heat capacity helps stabilize environmental temperatures
• Cohesion in water molecules is due to hydrogen bonds.


  True
• Water has highly polar bonds and dissolves polar and ionic substances
• Water is the main component of blood and lymph.


  True