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WorksheetsBiological Filter Pre-Test Aqua 3
Total questions: 24
Worksheet time: 21mins
You should never rinse the...
Gravel
Blue Filter Pad
Bio wheel
Why are too many nutrients (like nitrates and phosphates) bad for our waters?
Nutrients decrease the pH of the water, causing it to become increasingly acidic
Nutrients change the salinity of the water
Wetlands filter out runoff that may contain nutrients
Nutrients in the water cause too much algae growth, which decrease the level of oxygen in the water
What is salinity?
The property of containing salt
The amount of suspended solids
Describes the condition of the water
Describes how acidic or basic water is
Why are too many nutrients (like nitrates and phosphates) bad for our waters?
Nutrients decrease the pH of the water, causing it to become increasingly acidic
Nutrients change the salinity of the water
Wetlands filter out runoff that may contain nutrients
Nutrients in the water cause too much algae growth, which decrease the level of oxygen in the water
What is pH?
The property of containing salt
The measure of the amount of oxygen that is dissolved in water
The amount of suspended solids in water
The measurement of the acidity or basicity of water
Which glass contains water with high turbidity?
Glass 1
Glass 2
Temperature, turbidity, and water movement are the _____________ factors used to determine water quality.
physical
chemical
biological
Dissolved oxygen, pH, nitrates, and salinity are _____________ factors used to determine water quality.
physical
chemical
biological
True or False: A substance with a pH of 9 is considered basic.
True
False
Which of the following performs biological filtration?
Nitrifying bacteria
Bio wheel
Performed by living organisms
All of the above
What instrument is used to measure density/specific gravity?
sainometer
capacitor
hydrometer
filter
What is the Golden Rule for tank maintenance?
Remove all bacteria
Do NOT overfeed
Change out ALL of the water once a week
Use a light
Which of the following is a reason to do a partial water change?
Lower nitrate
Lower salinity
Level pH
All of the above
What is the first and most toxic Nitrogen compound in the Nitrogen cycle?
Ammonia
Nitrite
Nitrate
NH3 is the chemical formula for which nitrogen compound?
Ammonia
Nitrite
Nitrate
What is the second compound in the Nitrogen cycle?
Ammonia
Nitrite
Nitrate
NO3 is the chemical formula for which compound in the nitrogen cycle?
Ammonia
Nitrite
Nitrate
Which of the following are in the correct order of nitrifying bacteria in the nitrogen cycle?
Nitrobacter, Nitrosomonas
Nitrosomonas, Nitrobacter
What is dissolved oxygen?
oxygen gas dissolved in water
a primary plant nuttient
a measure of how acidic or basic a substance is
The higher the temperature, the more dissolved oxygen in water.
True
False
Desired pH level is
1-4
4-5
6-9
9-14
caused by municipal water sources
pH
temperature
chlorine
carbon dioxide
