NEW
Font size
WorksheetsWater Quality 8th Grade Block 1
Total questions: 15
Worksheet time: 21mins
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
Algal blooms can use up resources, which kills the aquatic plants. These plants are decomposed by bacteria that use up the oxygen in the water and kills all of the other organism. This process is called
respiration
digestion
photosynthesis
eutrophication
Which would most likely cause a sudden increase in nitrates in a waterway?
Fertilizer runoff from a farm field
Spill from an oil tanker
Runoff from a boat yard
Discharge of hot water from a chemical plant
After analyzing data collected from a pond, there is a significant decrease in dissolved oxygen. Which most likely caused this decline?
An increase in minerals
An increase in algae growth
An increase in sediment
A decrease in fish population
The pH of a healthy stream supporting aquatic life is:
below 4
6-8
above 9
4-6
What is the most important water quality factor affecting aquatic organisms?
pH
BOD (Biological Oxygen Demand)
DO (Dissolved Oxygen)
Turbidity
