Water and Life

Question 0

Heat

Answer 0

The amount of energy associated with the movement of the atoms and molecules in a body of matter.

Question 1

Four Properties of Water

Answer 1

1. High Heat Capacity
2. Water is a Solvent
3. Water is Cohesive
4. Frozen Water is Less Dense than Liquid Water

Question 2

Temperature

Answer 2

A measure of the intensity of heat, reflecting the average speed of molecules.

Question 3

Evaporative Cooling

Answer 3

The property of a liquid whereby the surface becomes cooler during evaporation (liquid to gas).

Question 4

Cohesion

Answer 4

Tendency of molecules to stick together. It results from hydrogen bonds. Important for surface tension and water transport in plants.

Question 5

Solvent

Answer 5

Dissolving agent in a solution.

Question 6

Solute

Answer 6

Substance that is dissolved in a solution.

Question 7

Solution

Answer 7

Liquid consisting of homogenous mixture of two or more substances: solvent and solute.

Question 8

Aqueous Solution

Answer 8

A solution in which water is the solvent.

Question 9

Acid

Answer 9

A substance that increases the hydrogen ion (H+) concentration in a solution (lower pH).

Question 10

Base

Answer 10

A substance that decreases the hydrogen ion concentration in solution (raises pH).

Question 11

pH scale

Answer 11

Measure of relative acidity of a solution ranging from zero (most acidic) to fourteen (most basic).

Question 12

Buffers

Answer 12

A chemical substance that resists changes in pH by accepting hydrogen ions from or donating hydrogen ions to solution.