The Water Cycle
The primary physical phase of water
What is liquid?
the two main substances burned in combustion
What are wood and fossil fuels?
Nitrifying bacteria convert _____ to _____
ammonium ... nitrates
number of oxygen atoms are there in the Phosphorus ion
what is 4?
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
What is photosynthesis?
This limits water availability to plants
What is freezing soil water?
When humans burn fossil fuels carbon enters the atmosphere in this form
What is carbon dioxide?
removes nitrogen from the atmosphere
What is Nitrogen fixation?
the two main factors of continuing the Phosphorus cycle
What is Decomposition and water runoff?
the process of settling or being deposited as a sediment
What is sedimentation?
Oceans contain __% of water
What is 97%?
When fungi and bacteria break down organic matter these two substances are returned to the environment.
What are carbon dioxide and water?
the chemical formula for nitrite
What is NO2 –?
number of significant phosphorus containing gasses there are
0
the process by which dead organic substances are broken down into simpler organic or inorganic matter
__ _________ exchange water directly with the environment
What is all organisms?
How does carbon get back into the atmosphere from the food we eat?
What is cellular respiration?
How does the decomposition of dead organisms affect the nitrogen cycle?
Decomposition releases NH4+ from organic compounds back into the soil, replenishing the soil reservoirs of NH4+
What do plants use the phosphate ion for
Synthesize organic compounds
the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers
What is transpiration?
type of energy that leads to the evaporation of liquid water
What is solar energy?
Why should the amount of carbon in the atmosphere stay the same?
Photosynthesis and respiration should balance each other out
What occurs in low-oxygen conditions?
Soil bacteria denitrifiers, strip the NO3- of oxygen atoms and release N2 into the atmosphere
The Phosphorus cycle remains ___ in most regions
a microbially facilitated process where nitrate is reduced and ultimately produces molecular nitrogen
What is denitrification?