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MGH 2(7)
Chapter 2 Vocabulary
Term | Definition |
---|---|
photosynthesis | a series of chemical reactions that convert light energy , water and carbon dioxide into the food-energy molecule glucose and give off oxygen |
cellular respiration | a series of chemical reactions that convert the energy in food molecules into a usable form of energy called ATP. |
Adenosine Triphosphate (ATP) | molecule found in all living organisms that is the main immediate source of usable energy for the activities of the cells. |
evaporation | process during which liquid water changes into a has called water vapor. |
condensation | process during which water vapor changes into liquid water. |
precipitation | water that falls from clouds to Earth's surface. |
nitrogen fixation | process that changes atmospheric nitrogen into nitrogen compounds that are usable by living things . |
chemosynthesis | process during which producers use chemical energy in matter rather than light energy and make food |
food chain | model that shows how energy flows in an ecosystem through feeding relationships |
food web | shows how food chains in a community are interconnected. |
energy pyramid | shows the amount of energy available in each step of a food chain. |