AP Biology Water and Transpiration

Which of the following effects is produced by the high surface tension of water?

• Lakes don't freeze solid in winter, despite low temperatures.

• A water strider can walk across the surface of a small pond.

• Organisms resist temperature changes, although they give off heat due to chemical reactions.

• Water can act as a solvent.

• The pH of water remains exactly neutral

Four Properties of water that facilitate an environment for life are:

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NGSS.MS-ESS2-4

What is the difference between hydrophobic and hydrophilic?

Because of the unique properties of water associated with hydrogen bonding, water evaporates from pores on leaves of plants and draws water molecules in a continuous chain from the roots up through the vascular tissues of plants. Which of these groups of terms describes the process and properties of water that explain this?

• adhesion, cohesion, and translocation

• adhesion, cohesion, and transcription

• cohesion, hybridization, and transpiration

• cohesion, adhesion, and transpiration

Tags

NGSS.MS-ESS2-4

Which of the following molecules would contain a polar covalent bond?

• Cl₂

• NaCl

• H₂O

• CH₄

The partial negative charge at one end of a water molecule is attracted to a partial positive charge of another water molecule. What is this type of attraction called?

• a polar covalent bond

• an ionic bond

• a hydration shell

• a hydrogen bond

Water is an excellent solvent. Select the property that justifies this statement.

• as a polar molecule, it can surround and dissolve ionic and polar molecules

• it forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with non polar molecules

• it forms hydrogen bonds with itself so cohesion is possible

• it is liquid and will adhere to many substances

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.

• Water has a high heat capacity.

• Water acts as a buffer.

• Water is non-polar.

What makes a molecule polar?

• Equal sharing of valence electrons

• Unequal sharing of valence electrons

• Stealing of electrons

• Temporary charges that come and go

Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

• Water is a good solvent.

• Water exhibits strong cohesion.

• . Water has an unusual crystalline structure.

• Water has a high capacity for heat.