Carbon Cycle
Nitrogen Cycle
Water Cycle
Misc
Misc
100
What is the carbon cycle?
The continuous movement of carbon through the earth's atmosphere.
100
What is the nitrogen cycle?
The nitrogen cycle is the cycle in which nitrogen continuously recycles through organisms, the air, and soil. Organisms need this cycle to carry out their everyday life processes.
100
What are the three processes of the water cycle?
Evaporation, Condensation, and Precipitation
100
What is a cycle?
A cycle is a continuous movement of an object through the non-living and living parts of an environment.
100
What role to consumers play in the carbon cycle?
Consumers absorb oxygen through photosynthesis, effectively creating carbon. In addition, when consumers die or fossil fuels are burned by humans, carbon is released in the air, bringing carbon into the air for later use in the cycle.
200
How do decomposers contribute to the carbon cycle?
They break down the remains of dead organisms and return the carbon to the earth.
200
What is the ratio of the percent of nitrogen in the air to the total percentage of air?
78:100
200
Which part of the water cycle is most effected by the sun?
evaporation
200
What is precipitation?
Precipitation is the process of the water cycle in which water falls to the ground in the form of sleet, hail, snow, or water.
200
What is transpiration?
Transpiration is the process in which plants release water in the form of water vapor.
300
How do living organisms contribute to the carbon cycle?
They breathe.
300
True or false: Plants and animals can absorb "free nitrogen" from the air.
False.
300
What are the three types of matter in the water cycle?
solid(ice) , gas(water vapor), and liquid(water)
300
What is evaporation?
Evaporation is the process in which water is heated and turns into water vapor, floats up, and later comes back down in precipitation.
300
What roles do plants play in the carbon cycle?
Plants use carbon in photosynthesis to create sugar molecules and release oxygen. THE CYCLE OF LIFE
400
How do fossil fuels contribute to the carbon cycle?
When the fossil fuels are burned they release carbon.
400
How do nitrogen-fixing bacteria affect/help the nitrogen cycle and what are they?
Nitrogen-fixing bacteria are bacteria that are located in the ocean/soil/roots of plants that could "fix" nitrogen and turn it into a form that is able to be used (often times nitrogen containing compounds).
400
What would cause the end of the water cycle?
If the sun is taken out. Without the sun, there would be no evaporation, which means there will be no condensation and precipitation.
400
How do humans affect the carbon level in the air? (2 answers)
When humans burn oil and other fuels, carbon dioxide is given into the air. Also when humans clear forests for lumber, fuel, and farmland, carbon dioxide rises. Trees are removed from the ecosystem, there are fewer producers to receive and collect carbon dioxide. (No oxygen.) Trees are burned down to clear a forest and more carbon is released.
400
What is "free nitrogen"?
"Free nitrogen" is the 78 percent of nitrogen that makes up the atmosphere. Plants and animals can not use this unless it is fixed.
500
How do humans affect the carbon cycle?
Humans cut down trees, breathe, and burn fuels.
500
1. How does nitrogen enter the atmosphere? 2. True or false: animals can only get nitrogen from plants.
1. Because plants/animals could not take in nitrogen directly from the atmosphere, they have to rely on plants. Nitrogen could enter the ground through lightning. Lightning strikes change the nitrogen into a form plants could use. 2. True
500
What is the water cycle and what would happen if there was no water cycle?
The water cycle is earth's natural water recycler. Without the water cycle, organisms would use all the freshwater and earth would run out of water. Most organisms would die.
500
What happens once nitrogen has been fixed?
Once nitrogen has been fixed, producers can use it to build proteins and other complex compounds. Decomposers break down these complex compounds in animal wastes and the bodies of dead organisms. Decomposition returns simple nitrogen compounds to the soil. At some point however, bacteria break down the nitrogen compounds completely. These bacteria then release free nitrogen back into the air. The cycle continues from there.
500
What is Nitrogen Fixation?
Greater source of nitrogen is nitrogen fixation. Nitrogen Fixation fixes bacteria life in oceans and soil. Nodules are bacteria that attach themselves to roots of some plants to get this nitrogen. Most organisms can use nitrogen only once it has been “fixed,” or combined with other elements to form nitrogen-containing compounds, which is also nitrogen fixation.
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