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???? Videos you must review ✔️(3rd year of middle school) Layered structure of the atmosphere???????? • [3rd year of middle school atmosphere and weather] Lecture 1. Structure of the atmosphere???? ┃Troposphere┃Stratosphere┃Mesosphere┃Thermosphere ✔️(2nd year of middle school) Layered structure of the hydrosphere???????? • [2nd year of middle school hydrosphere and seawater] Lecture 2. Layered structure of seawater???? Let's take notes together~ 00:25 Atmosphere 01:29 Hydrosphere 02:02 Layered structure of seawater by latitude 04:47 Lithosphere, biosphere, exosphere 05:58 Energy sources of the Earth system 07:12 Water cycle, carbon cycle ????List of Earth system lectures???? ✔️Lecture 1: Interactions of the Earth system ???????? • [1st year of high school Earth system] Lecture 1. Earth System????⎜Sea level by latitude... ✔️Lecture 2: Plate tectonics, earthquakes and volcanoes ???????? • [Grade 1 Earth System] Lecture 2. Plate tectonics⎥Plate boundaries (divergent boundaries, hydrologic...