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natural disastor
| Term | Definition |
|---|---|
| wind | the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction. |
| air pressure | air pressure. noun. The definition of air pressure is the force exerted onto a surface by the weight of the air. An example of air pressure is the average sea-level air pressure of 101.325 kPA. |
| high air pressure | A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere. These bring sunny skies. |
| low air pressure | A low pressure system is a whirling mass of warm, moist air that generally brings stormy weather with strong winds. When viewed from above, winds spiral into a low-pressure center in a counterclockwise rotation in the Northern Hemisphere. |
| westerlies | a wind blowing from the west |
| easterlies | a wind blowing from the east |
| energy | the strength and vitality required for sustained physical or mental activity. |
| coriolis effect | an effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation. |
| hurricane | a storm with a violent wind, in particular a tropical cyclone in the Caribbean |
| tornado | a mobile, destructive vortex of violently rotating winds having the appearance of a funnel-shaped cloud and advancing beneath a large storm system. |
| vortex | a mass of whirling fluid or air, especially a whirlpool or whirlwind. |
| focus | a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts. 2. Physics. a point at which rays of light, heat, or other radiation meet after being refracted or reflected. |
| trade winds | a wind blowing steadily toward the equator from the northeast in the northern hemisphere or the southeast in the southern hemisphere, especially at sea. |
| global winds | These Global Winds are the dominant prevailing wind patterns that blow in a fairly constant, steady direction across our earth. Global winds are comprised of three previaling winds: Tradewinds, Westerlies, and Polar Easterlies. |
| doldrums | a state or period of inactivity, stagnation, or depression. |
| sea breeze | a breeze blowing toward the land from the sea, especially during the day owing to the relative warmth of the land. |
| land breeze | a breeze blowing toward the sea from the land, especially at night, owing to the relative warmth of the sea. |
| jet stream | a narrow, variable band of very strong, predominantly westerly air currents encircling the globe several miles above the earth. There are typically two or three jet streams in each of the northern and southern hemispheres. 2. |
| tectonic plates | the two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches. |
| normal fault | A geologic fault in which the hanging wall has moved downward relative to the footwall. Normal faults occur where two blocks of rock are pulled apart, as by tension. |
| reverse fault | A geologic fault in which the hanging wall has moved upward relative to the footwall. Reverse faults occur where two blocks of rock are forced together by compression. |
| strike-slip fault | a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault. |
| p-waves | P-waves are a type of elastic wave, and are one of the two main types of elastic body waves, called seismic waves in seismology, that travel through a continuum and are the first waves from an earthquake to arrive at a seismograph. |
| s-waves | transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph. Also called secondary wave. |
| richter scale | a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations |
| epicenter | he point on the earth's surface vertically above the focus of an earthquake. |
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sierraharris4
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