geodynamics
81Breccia — (pronEng|ˈbrɛtʃiə, ˈbrɛʃiə, it. breach) is a rock composed of angular fragments of several minerals or rocks in a matrix, that is a cementing material, that may be similar or different in composition to the fragments. A breccia may have a variety …
82Geophysics — Geophysics, a major discipline of Earth sciences, is the study of the Earth by quantitative physical methods, especially by seismic, electromagnetic, and radioactivity methods. It calls heavily upon other fields of science such as math, physics,… …
83Meteorological Service of Canada — MSC Agency overview Formed 1871 Preceding agencies Dominion Meteorological Service (of Canada) Meteorological Branch, Transport Canada Jurisdiction Federal government of Canada Headquarters …
84Rayleigh number — In fluid mechanics, the Rayleigh number for a fluid is a dimensionless number associated with buoyancy driven flow (also known as free convection or natural convection). When the Rayleigh number is below the critical value for that fluid, heat… …
85Retroreflector — Infobox Laboratory equipment name = Retroreflector caption = A gold corner cube retroreflector acronym = other names = uses = Distance measurement by optical delay line inventor = manufacturer = model = related = A retroreflector (sometimes… …
86Coefficient of thermal expansion — When the temperature of a substance changes, the energy that is stored in the intermolecular bonds between atoms changes. When the stored energy increases, so does the length of the molecular bonds. As a result, solids typically expand in… …
87Datum (geodesy) — Geodesy Fundamentals Geodesy · …
88Weather forecasting — weather forecaster redirects here. For other uses, see Weatherman (disambiguation). Forecast of surface pressures five days into the future for the north Pacific, North America, and north Atlantic ocean. Weather forecasting is the application of… …
89Marshall Space Flight Center — George C. Marshall Space Flight Center Aerial view of the test area at MSFC …
90Asthenosphere — Under the thin oceanic plates the asthenosphere is usually much closer to the seafloor surface, and at mid ocean ridges it rises to within a few kilometers of the ocean floor. The upper part of the asthenosphere is believed to be the zone upon… …
