Earth's Surface
Earth's Surface - Related Videos
01:20
Variation in Acceleration due to Gravity near the Earth's Surface
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2023
An object's apparent weight is its weight measured by a spring balance at its location. It is different from its true weight, the force with which the Earth pulls it, because of the Earth's rotation. Mathematically, an object's apparent weight equals its true weight minus the centripetal force that keeps it in a circular motion along with the Earth's surface every 24 hours. The difference between the true and apparent weights is proportional to the square of the Earth's angular speed. Since the...
06:48
Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
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Cited by 2 •
2020
The protocol extracts information from light curves of exoplanets and constructs their surface maps. It uses light curves of Earth, which serves as a proxy exoplanet, to demonstrate the approach.
02:37
Conditions on Early Earth
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2020
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.In the 1920s, the scientists Oparin and Haldane proposed the idea that simple biological...
02:37
Conditions on Early Earth
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2026
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.In the 1920s, the scientists Oparin and Haldane proposed the idea that simple biological...
00:55
Acceleration due to Gravity on Earth
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2023
Newton's second law is closely related to his first law of motion. It mathematically gives the cause-and-effect relationship between force and changes in motion. Newton's second law is quantitative and is used extensively to calculate what happens in situations involving a force. All external forces acting on a system add together to produce a net force Fnet. A larger net external force produces a larger acceleration. This acceleration is directly proportional to, and in the same direction as,...
FAQs
Solar radiation supplies energy that the surface can absorb or reflect. The balance between these responses affects heat transfer and helps determine surface conditions. Because ground, oceans, atmosphere, and living systems exchange energy, variations in absorbed or reflected radiation can influence broader processes studied in climate modeling and environmental monitoring.
Gravity drives motion toward Earth, while pressure differences and friction modify how materials and systems move across or near the surface. Their combined effects help explain processes such as erosion and the movement of heat and matter. These relationships also matter when evaluating how infrastructure and instruments behave on or near the ground.
Weather patterns and ocean waves emerge within a system where the solid ground, oceans, and atmosphere exchange energy and matter. Heat transfer helps redistribute energy, while surface conditions influence motion and pressure. Examining these coupled effects allows physics-based studies to connect local surface behavior with larger environmental patterns.
Remote-sensing instruments support environmental monitoring by detecting information associated with surface conditions and the exchange of solar radiation. Their value comes from applying physical principles, including absorption and reflection, to observe areas that may be difficult to measure directly. Such measurements can contribute to surface studies, climate modeling, and natural-hazard assessment.
Climate modeling incorporates surface processes that control energy transfer between the ground, oceans, atmosphere, and living systems. Absorption and reflection of solar radiation, along with the transport of heat and matter, provide physically relevant relationships for representing changing conditions. These models help analyze how surface behavior contributes to broader climate patterns.
Natural-hazard assessment draws on physical processes associated with erosion, earthquakes, ocean waves, and weather patterns. Gravity, pressure, friction, heat transfer, and solar-radiation responses provide mechanisms for interpreting how surface conditions change or how energy and matter move. This knowledge supports evaluation of hazards and informs technologies and infrastructure designed for surface environments.