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- https://geo.libretexts.org/Courses/Lumen_Learning/Earth_Science_(Lumen)/12%3A_The_Atmosphere/12.01%3A_The_AtmosphereThis page explains Earth's atmosphere, its essential role in sustaining life by providing necessary gases, moderating temperatures, and protecting against UV radiation. It outlines the structure, incl...This page explains Earth's atmosphere, its essential role in sustaining life by providing necessary gases, moderating temperatures, and protecting against UV radiation. It outlines the structure, including layers such as the troposphere and stratosphere, highlighting the importance of the ozone layer and describing temperature variations.
- https://geo.libretexts.org/Courses/Lumen_Learning/Earth_Science_(Lumen)/15%3A_Stellar_Evolution_and_Our_Sun/15.03%3A_The_SunThis page details the Sun's composition, structure, and significance in the solar system. It primarily consists of hydrogen and helium, with layers including the core, radiative, and convection zones....This page details the Sun's composition, structure, and significance in the solar system. It primarily consists of hydrogen and helium, with layers including the core, radiative, and convection zones. Key phenomena such as solar flares, sunspots, and solar wind are explained, along with the implications of nuclear fusion changes. The Sun's energy is vital for life on Earth, influencing heat, light, and photosynthesis.
- https://geo.libretexts.org/Bookshelves/Meteorology_and_Climate_Science/Introduction_to_Climate_Science_(Schmittner_2021)/01%3A_Chapters/1.02%3A_ObservationsAlthough Earth’s climate is currently changing rapidly relative to past changes, in most regions where we live changes are slow enough that we do not notice them directly during our daily lives. In th...Although Earth’s climate is currently changing rapidly relative to past changes, in most regions where we live changes are slow enough that we do not notice them directly during our daily lives. In this chapter we will discuss some observations from the past 100 years and data from regions that are particularly sensitive to climate change, where the most dramatic effects have occurred.
- https://geo.libretexts.org/Courses/Lumen_Learning/Earth_Science_(Lumen)/10%3A_Geologic_History/10.05%3A_Early_EarthThis page envisions a film chronicling Earth's 4.5 billion-year history, detailing its transition from an inhospitable state to a thriving biosphere. It highlights significant geological transformatio...This page envisions a film chronicling Earth's 4.5 billion-year history, detailing its transition from an inhospitable state to a thriving biosphere. It highlights significant geological transformations, the emergence of life through simple organisms like cyanobacteria that enriched the atmosphere with oxygen, and the resultant formation of the ozone layer.
- https://geo.libretexts.org/Courses/Lumen_Learning/Earth_Science_(Lumen)/17%3A_The_Solar_System/17.02%3A_Inner_PlanetsThis page explores the inner planets—Mercury, Venus, Earth, and Mars—focusing on their geology, atmospheres, and distinctive features. It highlights Earth's unique qualities, compares Venus's extreme ...This page explores the inner planets—Mercury, Venus, Earth, and Mars—focusing on their geology, atmospheres, and distinctive features. It highlights Earth's unique qualities, compares Venus's extreme conditions and young surface to Mars's geological features and evidence of past water, and discusses ongoing exploration.
