Water Quality 8th Grade Block 1

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3

• 7

• 9

• 5

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic

• slightly acidic

• strongly basic

• slightly basic

Which food is the most acidic?

• Lemon Juice

• Orange Juice

• Bananas

• Baking Solda

Bleach is a strong base, what is the pH level of bleach?

• 1

• 2

• 13

• 14

On the pH scale what numbers are acids?

• 8-14

• 7

• 1

• 0-7

How does acid rain affect the pH of a stream or lake?

• The pH increases.

• The pH decreases.

• Acid rain does not affect pH.

• It causes an explosion

Which factor of water quality would excess sediment and debris in the water most affect?

• Dissolved Oxygen

• pH

• Temperature

• Turbidity

What is the relationship between temperature and dissolved oxygen in water?

• The higher the temperature, the more dissolved oxygen there is in the water.

• The lower the temperature, the more dissolved oxygen there is in the water.

• There is no relationship between temperature and dissolved oxygen.

• The higher the temperature, the more acidic the water is.

Turbidity is defined as

• the amount of acid/base in water.

• the speed a which particles in water are moving.

• the amount of particles floating in water.

• the amount of dissolved gases in water.

More dissolved oxygen in the water will lead to

• more diversity of organisms.

• more turbidity

• higher pH

• higher temperature