Nitrogen
What form of nitrogen can animals and plants use?
a) Nitrogen gas
b) Nitrite
c) Nitrate
d) Ammonia
Nitrate
Can hot or cold water hold more dissolved oxygen?
Cold
If a liquid has a pH of 8, would it be considered an acid, base, or neutral?
Base
What gas is given off by plants and taken in by animals?
Oxygen
Why might dissolved oxygen levels be higher during the winter?
Colder water holds more oxygen
Where do animals get their Nitrate from?
Plants
What does the word dissolved mean?
Broken down and mixed in with a liquid
What pH range is best for living things?
6.2-8.2
Plants absorb which gas from the atmosphere to conduct photosynthesis?
Carbon Dioxide
Temperature, pH, dissolved oxygen, and nitrogen are which kind of factor?
a) Biotic
b) Abiotic
c) Environmental
d) Aquatic
b) Abiotic
Nonliving substances such as nitrogen move through the environment in a series of steps called a _______
a) A food chain
b) Biomass
c) A cycle
D) Energy Pyramid
c) cycle
Does decomposition cause dissolved oxygen levels to increase or decrease?
Decrease
What causes the pH to increase?
a) Photosynthesis
b) Respiration
c) Decomposition
d) Colder water
a) Photosynthesis
What is the name of the process where humans burn fossil fuels?
Combustion
What is an inference?
A logical explanation about why something happened
What turns nitrite into the nitrate that plants and animals need to survive?
a) Plants
b) Bacteria
c) Water
d) Humans
Bacteria
Using a scale of 1-10, what is the best range for dissolved oxygen?
a) 6.2-8.2
b) 8-10
c) As close to 7 as possible
d) 7-10
d) 7-10
Is a liquid with more hydroxide considered an acid or base?
Base
Which of the following does not add carbon dioxide to the carbon cycle?
a) Combustion
b) Respiration
c) Photosynthesis
d) Forest fires
c) Photosynthesis
Humans polluting bodies of water through fertilizer from agricultural runoff, car exhaust, and sewage leads to a buildup of which of the following?
a) Carbon
b) Oxygen
c) Sediments
d) Nitrogen
D) nitrogen
What can increase nitrogen in our model ecosystem?
Animal waste and decomposition
What biotic process causes dissolved oxygen to increase?
photosynthesis
What can cause the pH to decrease?
Respiration or decomposition
What gas is produced by animals and used by plants for photosynthesis?
Carbon dioxide
If there was a decrease in the amount of bacteria in the soil, what would happen to the amount of usable nitrogen available to plants?
A) It would decrease
B) It would increase
C) It would not change
A) It would decrease