BIOSC-116 Lecture Notes - Lecture 21: Electromagnetic Radiation, Thermodynamics, Photosynthesis
9 Oct 2020
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Document Summary
It takes energy to climb a mountain or to build a protein. Energy is present in many forms such as: heat, chemical, electrical, and mechanical, electromagnetic radiation (visible, infrared, and uv) is also a type of energy. Energy can be transformed from one form to another: ex. All energy can be grouped into two groups: kinetic and potential energy. Kinetic: energy possessed by an object because it is in motion, ex. Photons, it can perform work by making other objects move. Potential: stored energy, ex. atoms in a glucose molecule have potential energy in the specific arrangements of energy (this is called: chemical potential energy) The laws of thermodynamics describe the energy flow in natural systems: Thermodynamics: study of energy and its transformations. The object being studied is the system and everything outside the system is the surrounding. Universe is system and surrounding (univ= sys + surr) Isolated: no exchange of matter and energy b/w system and surrounding.
