https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:ecology-and-natural-systems/x230b3ff252126bb6:organization-of-natural-systems/v/biotic-and-abiotic-factors-in-earths-natural-systems 2024-05-28T21:41:02.467178644Z Biotic and abiotic factors in Earth’s natural systems Natural systems are made up of both biotic factors (living organisms and their interactions) and abiotic factors (non-living parts of the environment such as sunlight and temperature). Earth can be divided into four systems, called spheres: the atmosphere (gases surrounding Earth), the biosphere (all living organisms), the geosphere (Earth's interior and surface), and the hydrosphere (all forms of water). Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/1b8f7160-2496-44ec-8a88-7e34c7fc5c26_1280_720_base.png Biotic and abiotic factors in Earth’s natural systems Natural systems are made up of both biotic factors (living organisms and their interactions) and abiotic factors (non-living parts of the environment such as sunlight and temperature). Earth can be divided into four systems, called spheres: the atmosphere (gases surrounding Earth), the biosphere (all living organisms), the geosphere (Earth's interior and surface), and the hydrosphere (all forms of water). https://cdn.kastatic.org/ka-youtube-converted/GxKWCiZHsvo.mp4/GxKWCiZHsvo.mp4 314 Earth's systems https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:ecology-and-natural-systems/x230b3ff252126bb6:organization-of-natural-systems/a/organization-of-natural-systems 2026-05-04T07:20:44.00495003Z Learn: Earth's natural systems Learn about biotic and abiotic factors and how these form Earth's natural systems: the atmosphere, the biosphere, the geosphere, and the hydrosphere. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:ecology-and-natural-systems/x230b3ff252126bb6:organization-of-natural-systems/a/the-biosphere 2026-05-04T07:20:44.00495003Z Learn: The biosphere Learn about the levels of organization in the biosphere, including biomes, ecosystems, communities, and populations. article https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:earth-systems-and-resources/x0b0e430a38ebd23f:earths-air-and-water/a/earth-s-atmosphere 2022-09-16T02:37:58.737082894Z Earth's atmosphere Review your understanding of the composition and layers of Earth's atmosphere in this free article aligned to AP standards. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:ecology-and-natural-systems/x230b3ff252126bb6:organization-of-natural-systems/e/apply-organization-of-natural-systems 2026-05-04T07:20:44.00495003Z Apply: Organization of natural systems Apply your understanding of the biosphere and Earth's natural systems in this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:earth-systems-and-resources/x0b0e430a38ebd23f:earths-air-and-water/e/earths-air-and-water 2025-08-08T21:39:42.49220884Z Earth's air and water Apply your understanding of Earth's air and water in this set of free practice questions aligned to AP standards. exercise