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Properties of Water Answers

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Which statement would be true about a water molecule if it had a linear shape?

It would contain ionic bonds.

It would have improved special properties.

It would easily bond with other water molecules.

It would be a nonpolar molecule.

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Which best explains why an iceberg floats?

Water expands and becomes denser when it freezes.

Water contracts and becomes denser when it freezes.

Water expands and becomes less dense when it freezes.

Water contracts and becomes less dense when it freezes.

Which is a cause of polarity in water molecules?

partial negative charge on the hydrogen atoms

partial positive charge on the oxygen atom

high electronegativity difference between oxygen and hydrogen

low electronegativity difference between oxygen and hydrogen

Which best explains why water has a high specific heat?

Hydrogen bonds decrease the amount of energy that is required for the temperature to change.

Hydrogen bonds increase the amount of energy that is required for the temperature to change.

Ion-dipole interactions increase the amount of energy that is required for the temperature to change.

Ion-dipole interactions decrease the amount of energy that is required for the temperature to change.

Which is the best example of water regulating an organism’s body temperature?

a jogger sweating after a run

a fish passing water over its gills

a deer taking a drink from a stream

a leaf using water for photosynthesis

Which statement best describes how water’s properties relate to its functions in a human’s biological systems?

Water absorbs a lot of energy from the skin due to its high specific heat.

Water enters the body and provides support due to capillary action.

Water helps decrease the body’s density to allow it to float.

Water dissolves and transports nonpolar covalent compounds in the body.

Which best explains why blood and the cytoplasm of cells are mainly composed of liquid water?

Water is a common substance and is readily available.

Water is an important transport and reaction medium.

Water prevents biological reactions from occurring readily.

Water prevents turgor pressure from making the cells too rigid.

Which best explains the high surface tension of water?

its high density

its ion-dipole interactions

its adhesive interactions

its hydrogen bonding interactions

Water molecules are polar because the

water molecule has a linear shape.

water molecule has a bent shape.

oxygen atom has fewer electrons around it.

hydrogen atom forms an ionic bond with oxygen.

Which example best shows that the chemistry of water is helpful to plants?

Water’s polarity produces a high density, which allows water to move to the leaves.

Water’s bent shape causes a slow passage of nutrients up to the leaves of plants.

Water’s polarity causes cohesion that pulls other water molecules up through a plant.

Water’s bent shape reduces its own passage through the cell membranes of roots.

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Properties of Water Answers

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