GOL 111 Ch. 5 Review Flashcardizz

Front

Water is most dense when it is ...

Back

cold and salty.

Front

Why does ice float on water?

Back

As water freezes, hydrogen bonds form between all water molecules, which expands the volume and decreases the density of ice.

Front

Human consumption of which of the following components of seawater helps prevent goiters?

Back

Iodine.

Front

Compared to other substances, water has a _____ specific heat capacity.

Back

high.

Front

What makes water a universal solvent?

Back

It is a polar molecule, and its polarity allows it to dissolve many substances.

Front

Define specific heat capacity.

Back

The amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius.

Front

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

Back

It helps regulate temperature in the environment and within organisms.

Front

Explain the term 'polar molecule.'

Back

A molecule with a partial positive charge on one side and a partial negative charge on the other, allowing it to interact with other polar substances.

Front

What role does iodine play in human health?

Back

Iodine is essential for the production of thyroid hormones, which regulate metabolism.

Front

Describe the process of hydrogen bonding in water.

Back

Hydrogen bonds form between the positive hydrogen atoms of one water molecule and the negative oxygen atoms of another, leading to unique properties of water.