The Cycles (Hydrologic, Carbon, Nitrogen, Phosphorus)
Terms in this set (47)
An underground reservoir that holds water is called?
The amount of water on earth is?
Always the same
Which of the following is the largest reservoir within the hydrologic cycle?
Where is most of the Earth's fresh water stored today?
Polar ice sheets
The process by which water is taken up by plants and released into the atmosphere is called?
Which of the following processes within the water cycle is responsible for changing water from a liquid to a gas?
Soil moisture is important for what?
Agricultural productivity, water quality, ecosystem health
Components of the hydrologic cycle include, precipitation, condensation, surface runoff, and what?
The water which falls to Earth after condensing into either rain or snow?
What role does the photosynthetic process play in the hydrologic cycle?
It breaks down water molecules
Water vapor converted by cool surfaces is called?
Water droplets that are too heavy to float make?
Ground and surface water accounts for____% of all the water on Earth
In what form does nature store carbon beneath the ground?
Besides breathing, how do we release large amounts of carbon into the atmosphere?
Burning fossil fuels
What metabolic process releases carbon into the atmosphere?
The food that plants make in photosynthesis is what?
Which gas is given off as a product of photosynthesis?
What is the largest reservoir of carbon?
In what molecular form do we find carbon in the atmosphere?
What types of organisms use carbon dioxide as a necessary nutrient?
What organisms get rid of carbon dioxide as a waste product?
Which of the following decreases carbon dioxide levels in the atmosphere?
The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from an increase in what?
The burning of fossil fuels
How does the carbon return back to the atmosphere after an organism dies?
Decomposition and decay
What is the common way for nitrogen gas to be converted to a usable form for plants?
Nitrogen fixating bacteria
Which of the following is a component of acid rain?
Eutrophication in coastal water can cause an increase in what?
Harmful algal blooms
Which process releases nitrogen gas back into the atmosphere?
Once bacteria have fixed nitrogen, it can be taken up by plants and animals, where it is used in the production of what?
What do plants do with the nitrogen they absorb?
Use it to make DNA
What is the function of nitrifying bacteria?
Convert ammonium into nitrates
Where are nitrogen fixing bacteria found?
On roots of some plants
The relationship between certain bacteria found on the roots of soybean is what?
The type of bacteria responsible for converting ammonia into nitrates is what?
Plants that contain bacteria on their roots that utilize nitrogen gas are in a category called?
What percent of the atmosphere is nitrogen gas?
What word do we use that means "to change molecular structure?''
What percent of the atmosphere is carbon dioxide?
Why is phosphorus an important biological molecule?
Makes up ATP and NADP
What happens to phosphorus that erodes from rock and soil?
Phosphorus unites with oxygen to make phosphates.
How are phosphates incorporated into the organic molecules in plants and animals?
Absorbed by plant roots
What happens to phosphate when plants and animals die?
Returns to water
What happens to phosphorus that is carried by runoff to oceans?
Marine sediment and fish scales
What is the difference about the phosphorus cycle as compared to the hydrologic, carbon, and nitrogen cycles?
Not in the atmosphere
What is bird or bat droppings called?
Where is phosphorus found?
Within the rocks