3 087 mots et expressions · 21 thèmes
the upper surface of the saturated zone in an unconfined groundwater system
an area of land from which water drains toward a common river, lake, or other outlet
the physical breakdown or chemical alteration of rock at or near the surface without moving it elsewhere
the passage of a spacecraft or another object from space into a planetary atmosphere
the angle between a body's rotation axis and a line perpendicular to its orbital plane
a planet outside our solar system
a large planet composed mainly of hydrogen and helium, such as Jupiter or Saturn
to distinguish closely spaced objects as separate in an astronomical observation
relating to stars
the changes that stars undergo during their lifetimes
a planet with a mainly rocky composition and a solid surface
the planned or actual path followed by a spacecraft through space
the rate at which velocity changes with time, through a change in speed, direction, or both
relating to sound, its production, or its transmission and behavior
a metallic material made by combining a metal with one or more other elements
the maximum size of a wave or oscillation's departure from its equilibrium value
a material made by combining different constituent materials that remain distinguishable within the whole
the action of pressing a body or material together under inward forces, often reducing its size or volume
the principle that the total energy of an isolated system remains constant even when its forms change
heat transfer associated with the bulk movement of a liquid or gas
to deteriorate through chemical or electrochemical interaction with the surroundings, or cause a material to do so
the deterioration of a material through chemical or electrochemical interaction with its surroundings
the change from an object's initial position to its final position, including direction
a measure of how strongly a component opposes electric current, expressed through the ratio of voltage to current
the tendency of an object to resist changes in its velocity
to separate or cover something with material that limits the passage of electric current
a field describing magnetic influence in space, including forces on moving charges and magnets
the sum of a system's kinetic energy and potential energy
energy transferred when a force has a component along the displacement of its point of application
made liquid by high temperature, especially when describing rock or metal
the principle that the total energy of an isolated system remains constant even when its forms change
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