process by which light energy is converted to chemical energy.

organisms that use energy from sunlight or from chemical bonds in inorganic substances to make organic compounds.

organisms that must get energy from food instead of directly from sunlight or inorganic substances.

a metabolic process through which heterotrophs, including humans, get energy from food.

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Sec. 1 Key Terms

Chapter 5: Photosynthesis and Cellular Respiration

Question	Answer
Photosynthesis	process by which light energy is converted to chemical energy.
Autotrophs	organisms that use energy from sunlight or from chemical bonds in inorganic substances to make organic compounds.
Heterotrophs	organisms that must get energy from food instead of directly from sunlight or inorganic substances.
Cellular Respiration	a metabolic process through which heterotrophs, including humans, get energy from food.