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Nutrient Cycle

________% of all water on earth is stored in the oceans as salt water. 97%
What are the 3 primary processes of the water cycle? Evaporation, condensation, and precipitation
What is the process of evaporation? Evaporation refers to the transformation of a liquid to a gas.
What is transpiration? Evaporation that takes place from the leaves of plants.
What is humidity? The amount of water in the air.
True or False: The warmer the air, the more water it can hold. True!
What makes air saturated? When air is holding the maximum amount of water at a certain temperature, it is said to be saturated.
How does condensation occur? Condensation occurs when a gas cools into a liquid. Condensation occurs when saturated air is cooled.
How does precipitation occur? Precipitation occurs when water droplets suspended in clouds become too heavy to remain in suspension. These water droplets fall as rain, hail, sleet, or snow.
True or False: Precipitation may not collect as surface water that drains into lakes, rivers, streams, and other bodies of water. False! Precipitation may collect as surface water, which then drains into lakes, rivers, streams, and other bodies of water.
What is groundwater? Groundwater is water residing in the soil and rock below land surface.
What is erosion? The process of water transporting rock fragments. Erosion carries rock particles from elevated to lower areas.
What are autotrophs? Organisms that make their own food from simple substances.
What are heterotrophs? They depend on autotrophs, either directly or indirectly, for their food supply—they eat other organisms.
Explain the carbon cycle. The cycling from reservoirs (rocks, sediments, and the ocean), to the atmosphere (mostly as CO2), to organisms in food webs, and back to reservoirs.
What does photosynthesis do? Photosynthesis removes carbon dioxide from the atmosphere and uses it to build food molecules.
What does cellular respiration do? Cellular respiration involves the breakdown of these food molecules, resulting in the release of carbon dioxide gas.
What happens through decomposition? Through the process of decomposition, much of their carbon is returned to the atmosphere as carbon dioxide.
Which of the following would release carbon dioxide into the atmosphere? the burning of fossil fuels, volcanic eruptions, cellular respiration All of them
Why is carbon dioxide considered a greenhouse gas? Carbon dioxide is called a greenhouse gas because it has the property of retaining radiant heat
Nitrogen makes up about ______% of Earth's atmosphere. This is the reservoir of nitrogen of living things. 80%
How is nitrogen absorbed by living things? From the soil as a nutrient.
What is the first phase of the nitrogen cycle? Some species of bacteria and archaea convert atmospheric nitrogen into nitrogen compounds into the soil.
What is the second phase of the nitrogen cycle? Plants absorb nitrogen compounds from the soil and change it into their own molecules.
What is the third phase of the nitrogen cycle? Animals receive nitrogen compounds when they eat plants.
What is the fourth phase of the nitrogen cycle? Both animals and plants return nitrogen compounds to the soil through waste and decomposition.
What is the fifth phase of the nitrogen cycle? Some bacteria decompose nitrogen compounds in the soil into nitrogen gas.
What are the processes of the nitrogen cycle called? fixation, mineralization (ammonification), nitrification, and denitrification.
What can cause an algal bloom? Runoff rich in nitrogen compounds.
What does the phosphorus cycle involve? The phosphorus cycle involves the transfer of phosphorus, primarily in the form of phosphate (PO43–) between rocks, soil, water, and organisms.
What is the main source of phosphorous compounds to an ecosystem? Rock weathering.
Which of the following processes does not contribute to carbon cycling? Condensation, photosynthesis, combustion, respiration Condensation
Phosphorous is an important component in which of the following? ATP, DNA, Both, Neither Both
Nitrogen is a primary elemental component of which of the following? DNA + Amino Acids, Sugars + DNA, Fats + Amino Acids, Sugars + Amino Acids DNA + Amino Acids
What is the order of the water cycle? Condensation, Precipitation, Evaporation, Condensation....
True or False: Organisms breathe in nitrogen gas as part of the nitrogen cycle False!
What is an accurate comparison of watersheds and aquifers? one involves water collection above ground and the other below ground
What is true of the phosphorus cycle but NOT the water cycle? It does not include a gaseous form.
Phosphorous on the oceanic floor comes from several sources but does not come from ________. rain water
True or False: Most precipitation falls on land before flowing to oceans. False! Most precipitation falls into the oceans.
Plants absorb phosphorous through their ________ and animals obtain it from ________. roots; food
Created by: JustEmma
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