BIO 1120 Unique Properties of Water

What is the main reason for the polarity of water molecules?

• Equal sharing of electrons between the oxygen and hydrogen atoms

• The lack of attraction between oxygen and hydrogen atoms

• Unequal sharing of electrons between the oxygen and hydrogen atoms

• The absence of hydrogen bonding

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How does the polarity of water molecules contribute to its ability to dissolve many substances?

• The polarity of water molecules makes them unable to form bonds with other substances

• The polarity of water molecules has no effect on its ability to dissolve substances

• The polarity of water molecules causes them to repel other substances

• The polarity of water molecules allows them to form hydrogen bonds with other substances.

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What is the difference between cohesion and adhesion of water molecules?

• Cohesion is the repulsion between water molecules, while adhesion is the repulsion between water molecules and other substances.

• Cohesion is the attraction between water molecules, while adhesion is the attraction between oil molecules and other substances.

• Cohesion is the attraction between water molecules, while adhesion is the attraction between water molecules and other substances.

• Cohesion is the tendency of water molecules to separate, while adhesion is the tendency of water molecules to stick together.

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How does the high specific heat capacity of water affect its role in moderating temperature on Earth?

• It causes extreme temperature fluctuations on Earth

• It has no effect on moderating Earth's temperature

• It helps to moderate Earth's temperature by absorbing and releasing large amounts of heat with minimal temperature change.

• It leads to a decrease in Earth's overall temperature

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What is the significance of water's high specific heat capacity for living organisms?

• It makes living organisms more susceptible to temperature changes.

• It has no effect on living organisms.

• It helps to maintain stable temperatures within living organisms.

• It causes dehydration in living organisms.

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Why is water considered a universal solvent?

• It can only dissolve substances in small quantities.

• It is not actually a solvent at all.

• It is only able to dissolve a few specific substances.

• It has the ability to dissolve a wide variety of substances.

What role does water play in the dissolution of ionic and polar covalent compounds?

• Water has no effect on the dissolution of ionic and polar covalent compounds

• Water repels the charged or polar parts of the compounds

• Water forms hydrogen bonds with the charged or polar parts of the compounds

• Water forms covalent bonds with the compounds

Explain how the surface tension of water allows certain insects to walk on water.

• The surface tension of water allows certain insects to walk on water by repelling them away from the surface.

• Certain insects are able to walk on water due to the buoyancy of the water.

• The surface tension of water allows certain insects to walk on water by supporting their weight and preventing them from sinking.

• The surface tension of water allows certain insects to walk on water by creating a sticky surface that holds them in place.

How does the polarity of water molecules contribute to its ability to dissolve many substances?

• The polarity of water molecules allows them to form covalent bonds with other substances

• The polarity of water molecules allows them to form hydrogen bonds with other substances.

• The polarity of water molecules causes them to repel other substances

• Water molecules have no effect on dissolving substances

Explain how the cohesion of water molecules contributes to the phenomenon of surface tension.

• The cohesion of water molecules creates a strong attraction between them, causing the surface of water to act like a thin, elastic film.

• The cohesion of water molecules causes them to repel each other, reducing surface tension

• Water molecules are not cohesive, so they do not contribute to surface tension

• Surface tension is caused by the adhesion of water molecules to other substances, not cohesion