AP Bio Insta-Review Topic 1.1*: Structure of Water & H Bonding

Front

What is the structure of a water molecule?

Back

A water molecule (H2O) consists of two hydrogen atoms covalently bonded to one oxygen atom, forming a bent shape.

Front

What type of bond forms between water molecules?

Back

Hydrogen bonds form between water molecules due to the polar nature of water.

Front

What is specific heat and why is it important for water?

Back

Specific heat is the amount of heat required to raise the temperature of a substance. Water has a high specific heat, which helps regulate temperature in environments.

Front

What is cohesion in relation to water?

Back

Cohesion is the attraction between water molecules, which allows for surface tension and the formation of droplets.

Front

What is adhesion in relation to water?

Back

Adhesion is the attraction between water molecules and other substances, which helps water move up plant stems.

Front

Why is water less dense as a solid?

Back

Water expands when it freezes, making ice less dense than liquid water, allowing it to float.

Front

What is the significance of hydrogen bonds in biological molecules?

Back

Hydrogen bonds are crucial for the structure and function of proteins and nucleic acids, stabilizing their shapes.

Front

How does water's high specific heat affect climate?

Back

Water's high specific heat helps moderate temperatures in coastal areas, preventing extreme temperature fluctuations.

Front

What role does water play in evaporative cooling?

Back

Evaporative cooling occurs when water evaporates, taking heat away from the surface, which cools the environment.

Front

What is surface tension and how is it related to water?

Back

Surface tension is the cohesive force at the surface of water that allows it to resist external force, enabling small objects to float.