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SCI8-Cycles

Carbon, nitrogen, and rock cycles (EPISD 8th grade)

QuestionAnswer
Rock cycle Cycle of the forces on the earth that destroy, change, and reform rocks
Sedimentary rock Rocks formed through erosion of igneous and metamorphic rock
Metamorphic Rocks formed through heat and pressure
Magma Molten rock that makes up the earth’s mantle
Igneous Rock formed from the crystallization of magma
Nitrogen cycle The process through which nitrogen is used and returned to the atmosphere
Nitrogen Makes up about 78 percent of the air
Free nitrogen Nitrogen not combined with other atoms
Nitrogen fixation The process by which nitrogen is made usable by organisms
Lightning Fixes nitrogen which is brought to the soil by rain
Nodules Bumps on the roots of legumes (clover, beans, peanuts, and etc…)
Decomposers Break down animal waste and dead animals and release free nitrogen into air
Bacteria Live in nodules and perform nitrogen fixation
Carbon cycle System that transfers carbon between different parts of the environment
Volcanic activity Releases carbon dioxide into the air through the gasses of magma
Photosynthesis Process through which plants change water and carbon dioxide into glucose and oxygen
Oxygen Animals breath in _______ and create carbon dioxide
Carbon dioxide Plants take in _____ and make oxygen
Plants When these decay it releases carbon dioxide which is released into the atmosphere
Human activity Burning fossil fuels in factories creates carbon dioxide and is an example of this
Global warming A slight increase of the earth’s atmospheric temperature
Greenhouse gases Gases in the atmosphere that trap solar energy
Created by: sLnelson
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