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Chapter 8, Section 1: How do Organisms Obtain Energy

energythe ability to do work or cause change
thermodynamicsstudy of the flow and transformation of energy in the universe
first law of thermodynamicsenergy is neither created nor destroyed, but may be converted from one form to another
second law of thermodynamicswhen energy is changed from one form to another, some useful energy is always degraded into lower quality energy, usually heat
autotrophsorganisms that use energy from sunlight or inorganic substances to make organic compounds
heterotrophsOrganisms that depend on other organisms for their food
metabolismthe total of the chemical processes in a cell
photosynthesisthe anabolic process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
cellular respirationthe catabolic process whereby certain organisms obtain energy by breaking down organic molecules
adenosine triphosphate (ATP)One of the principal chemical compounds that living things use to store and release energy

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