Chapter 2 Test OR Questions

Question 1

Polar Molecule

Answer 1

The electrons of the molecule are unequally shared

Question 2

What causes polarity?

Answer 2

A difference in electronegativity

Question 3

Capillary action

Answer 3

The collective work of cohesion+adhesion of water through a plant

Adhesion of water to the walls of cells helps counter the downward pull of gravity

Question 4

Surface tension

Answer 4

A measure of how difficult it is to stretch or break the surface of a liquid

Question 5

Specific Heat

Answer 5

The amount of heat that must be absorbed/lost for 1g of a substance to change 1 degree Celsius

Question 6

High specific heat

Answer 6

It takes more to change water than other liquids

1. Stabilizes ocean temperature
2. Keeps land/water temperature in the limits for life
3. Organisms can resist drastic change in their temperature (made of water)
4. Can moderate air temperature

Question 7

Heat of vaporization

Answer 7

The quantity of heat a liquid must absorb for 1g of it to be converted from a liquid to a gas

Question 8

Evaporative cooling

Answer 8

Warmer molecules evaporate and leave cool ones behind

1. Stabilizes temperature of large bodies of water
2. Produces a mechanism that protects organisms from overheating

Question 9

Expansion upon freezing

Answer 9

The hydrogen bonds become widespread

Keeps bodies of water from freezing solid

Question 10

Versatility as a solvent

Answer 10

Water is the universal solvent because water is polar and is attracted to positive and negative charges