[Music] our world is in peril gaia this period of the earth can no longer stand a terrible distraction pledging our planet good day earthlings i am teacher sheen your earth freak green fanatic science tastic teacher join me as we explore the interconnections between the land oceans atmosphere and the life of our planet watch intently and listen sensibly as we delve into the wonders of planet earth [Music] let's review what we had last time the five main factors that make the planet earth habitable for us earthlings do you remember what the acronym tween stands for t temperature where the earth is at the right distance from the sun w water liquid water is necessary for life to exist e energy with a steady input of either light or chemical energy cells can run chemical reactions necessary for life a atmosphere it keeps the surface warm and protects us from radiation and small to medium-sized meteorites and nutrients they are essential factors used to build and maintain organisms body structure the objectives for today's lesson are identify the four subsystems of the earth distinguish the characteristics of each subsystem explain how matter and energy flow in the subsystems and trace the flow of matter and energy in the subsystems earth is the third planet from the sun and considered as haven for many life forms as a closed system it serves as harbor of life for billions of years and still continue to comfort innumerable life forms thus earth itself has different systems that interact with others to provide all necessities in order for life to continue to prosper before we go on our lesson answer these questions to find out if you got something in your packets about today's topic are you ready okay let's do it number one which of the following is a system in which there is only an exchange of heat or energy and no exchange of matter a closed system b open system c subsystem or the solar system [Music] what is your answer right a closed system number two which earth subsystem refers to the set of all light forms on earth a atmosphere b biosphere c geosphere or d hydrous fear what do you think is the answer great the answer is letter b biosphere number three which two subsystems are interacting when plants produce oxygen a atmosphere and geosphere b biosphere and atmosphere c biosphere and hydrosphere or d hydrosphere and atmosphere [Music] do you think you get it right this time let's see the correct answer is letter b bias fear and atmosphere number four which of the following is unabiotic factor a plant b air c trees or d bees [Music] what is your answer yes be air number five what subsystems are involved in the statement given below flooding moves soil and racks to new places a atmosphere and hydrosphere b geosphere and biosphere c hydrosphere and biosphere rd hydrosphere and geosphere [Music] what do you think is the answer very good the answer is letter d hydrosphere and geosphere system is a set of interconnected components that are interacting to form a unified whole examples are the solar system all the body system the ecosystem and the earth system today we're going to focus with the subsystems of the earth earth is a complex system of interrelating physical chemical and biological processes it is a system in which there are sets of interconnected components that are interacting to form a unified whole earth is comprised of four major smaller systems known as subsystems these are also called as spears of the earth these are the atmosphere geosphere hydrosphere and biosphere atmosphere serves as the earth's blanket its name rooted from the greek word atmos which means gas and spyra which means globe or ball it is composed of gases in varying amount and its relative abundance is also crucial in different parts of the earth the air in the atmosphere is generally composed of 78 nitrogen 21 oxygen 0.9 percent argon and the remaining 0.10 percent is made up of different trays of gases and vapor it serves as the earth's protection from harmful uv rays and keeps the planet warm through greenhouse atmosphere is affected by the earth's gravity so this is the reason why as the altitude increases the amount of gases in the atmosphere decreases it is composed of layers namely troposphere stratosphere mesosphere thermosphere and exosphere geosphere comes from the greek word geos meaning ground it pertains to the solid part of the earth it is divided into three layers such as the crust mantle and the core is composed of naturally occurring solid aggregate of minerals organic material or natural glass called rocks it is also composed of loose particles of rocks that envelope the surface of the earth called regolith it contains all the soil rocks and minerals present in the crust to the core of the earth it comprises the geologic landforms such as mountains and hills hydro is a greek word which means water hydrosphere is composed of all the water on earth in any form this can either be in a form of water vapor and liquid water another part of this subsystem is the permanently frozen parts called cryosphere earth is the only planet in the solar system that is known to contain water in all three phases water on earth is constantly and consistently moving because of temperature and salinity it also plays an important role in absorption and redistribution of solar radiation biosphere comes from the greek word bias meaning life it is composed of all living things and the areas where they were found it includes all animals microbes and plants it extends to the upper areas of the atmosphere where insects and birds can be found it also extends to the deep parts of the oceans where marine organisms can still survive it is also in this zone that interaction between different subsystems is most dynamic in biosphere each organism plays an important role in the food web if one is lost the others will be affected matter and energy flow and cycle between the four subsystems to sustain and make life on earth possible both of them can flow across the boundaries between each subsystem the geosphere is where the rocky part of the earth is in contact with water air and life it is also generally where the spheres intersect and affect each other the processes that move matter and energy from one sphere to another is called spear interactions changes in any sphere greatly affect the other spheres as well since all the spheres are interconnected system the four subsystems are closely linked through biogeochemical cycles which involves biological geochemical and chemical factors these cycles are alleyways by which substances move through biotic which is biosphere and abiotic which are geosphere atmosphere and hydrosphere components of the earth it allows the circulation of important nutrients that form and support life like carbon oxygen nitrogen phosphorus calcium and water any interference and disturbance in the flow of matter and energy may cause damage to any of the subsystems and its components [Music] we learned some information about earth's subsystem let us now check your comprehension on this topic choose the letter of the correct answer number one earth is made up of landforms like mountains and hills in which subsystem do mountains and hills belong a atmosphere b biosphere c geosphere or d hydrosphere the correct answer is c geosphere number two which of the following is a biotic factor a water b air c rocks or d beast the answer is d bees number three oceans cover almost the entire earth surface this is the big part of the earth's hydrosphere and plays an important role in the earth's habitable condition which of the following is its function a it protects and absorbs solar radiation b it protects and absorbs solar radiation c it absorbs and redistributes solar radiation or d it absorbs and replenishes solar radiation the answer is c it absorbs and redistributes solar radiation number four which subsystem contains all living organisms of earth including those in the land in the water and in the air a atmosphere b biosphere c geosphere or d hydrosphere the answer is b biosphere number five which of the following is an interaction between geosphere and atmosphere a bacteria converting nitrogen to ammonium b plants undergoing the process of transpiration c rocks undergoing the process of weathering due to flood 30 water evaporating from the soil the answer is letter d water evaporating from the soil [Music] let's wrap it up today you learned about the earth's subsystems as a study of how the four spheres of the earth interact continuously and how each spear affects the others it is also defined as a set of physical chemical and biological systems that are interconnected by flows of mass and energy the four major systems of the earth are air water land and life the biological components of the earth's system is called spear this sphere is divided into four the geosphere the atmosphere the biosphere and the hydrosphere remember that all the spheres interconnect and overlap a line from the theme song of the movie pocahontas say and we are all connected to each other in a circle in a hoop that never ends tune in for our next science tastic episode on earth materials and resources physical and chemical properties of minerals as we continue to explore the interconnections between the land ocean atmosphere and the life of our planet only here at debit tv this is teacher sheen your earth freak green fanatic science-tastic teacher see ya [Music] do [Music] you