An instrument for measuring and indicating the force or speed of the wind.
An instrument for determining the pressure of the atmosphere.
The average course or condition of the weather at a place usually over a period of years as exhibited by temperature, wind velocity and precipitation.
The circulatory motion that occurs in a fluid at a non-uniform temperature owing to the variation of its density and the action of gravity.
A change in the crust of a planet, moon or asteroid.
The total or partial obscuring of one celestial body by another.
The part of the Earth's surface directly above the focus of an earthquake.
To fracture so as to produce a geologic fault.
Causing rock strata to undergo bending or curvature.
Any of the very large groups of stars and associated matter that are found throughout the universe.
To subject to glacial action in which a large body of ice moves slowly down a slope or valley, or spreads outward on a land surface.
The solid part of a celestial body (such as Earth), specifically, the outer part of the solid Earth composed of rock essentially like that exposed at the surface and usually considered to be about 80 kilometers (50 miles) in thickness.
Molten rock material within the Earth from which igneous rock results by cooling.
Periods of time in which there was a reversal in direction of the Earth's magnetic field.
The part of the interior of a terrestrial planet, especially the Earth, that lies beneath the lithosphere and above the central core.
One of a large number of celestial bodies of various size that appear as meteors when they enter Earth's atmosphere.
A broad luminous irregular band of light that stretches completely around the celestial sphere and is caused by the light of myriads of faint stars.
A solid homogeneous crystalline chemical element or compound that results from the inorganic processes of nature.
A long, narrow, deep depression in the ocean bed.
The alternate rising and falling of the surface of the ocean and water bodies (such as gulfs and bays) connected with the ocean that occurs usually twice a day, and is caused by the gravitational attraction of the sun and moon occurring unequally on different parts of the Earth.
To cause (a portion of Earth's surface) to rise above adjacent areas.
The sequence of conditions through which water passes from vapor in the atmosphere through precipitation upon land or water surfaces and ultimately back into the atmosphere as a result of evaporation and transpiration.
The state of the atmosphere with respect to heat or cold, wetness or dryness, calm or storm, clearness or cloudiness.
To subject to the action of the elements.