Needed for amino acids, proteins, and nucleic acids (DNA & RNA)
What is nitrogen
100
In a ________ system matter and energy can enter and leave.
What is open
100
form of carbon found in the atmosphere
What is carbon dioxide or methane
200
The number of neutrons plus the number of protons
What is mass number
200
the volume of water that moves through a river over a given period of time
What is stremflow
200
Cycle takes place in 3 of 4 spheres
What is phosphorus does not take place in the atmosphere
200
a relationship that moves toward an extreme
What is a positive feedback loop
200
Biggest releaser of carbon dioxide
What is burning fossil fuels
300
A charged atom
What is an ion
300
high transparency measure
What is 75 cm or higher
300
When Co2 is taken in and oxygen is released
What is photosynthesis
300
earth is a(n) ______ system
What is closed
300
Type of rock limestone is
What is carbonate rock
400
A bond that shares electrons
What is covalent
400
the unit of measurement stream flow is measured in
What is ft3/sec
400
Affect DO levels in water
What is temperature, current velocity/aeration, and water clarity
400
Energy can enter and leave
What is open and closed systems
400
The cutting down and burning of trees
What is slash and burn
500
Bond sodium and chlorine would form
What is ionic
500
Sources of cloudy water
What is What is soil erosion runoff, waste water discharge, carp/other fish stirring up sediment, eroding stream banks, urban runoff, and excessive algae growth
500
60% of nitrogen entering the cycle comes from this
What is commercial inorganic fertilizers
500
global air temp increases-> increased water vapor in the atmosphere-> increased greenhouse warming from water vapor