condition of being exact or correct.
existing, moving, growing, or operating in the air.
science of the origin, development, and culture of human beings.
to evaluate or determine the amount of.
to help or support.
violent encounter during a conflict.
single piece of land cultivated and maintained by a group of people.
device designed to access data, perform prescribed tasks at high speed, and display the results.
(singular: datum) information collected during a scientific study.
unmanned aircraft that can be guided remotely.
to hire or use.
element contributing to an event or outcome.
having to do with aircraft whose lift is generated by speed and the movement of air over its wings, which are unmoving and fixed to the fuselage of the aircraft.
lie, trick, or misrepresentation played to gain goods and services.
any system for capturing, storing, checking, and displaying data related to positions on the Earth's surface.
study of places and the relationships between people and their environments.
having to do with geography and location.
device that gets radio signals from satellites in orbit above Earth in order to calculate a precise location.
activity pursued for fun and personal fulfillment, not as a job.
activity that produces goods and services.
not able to perform a task well.
having a very bad reputation.
part of the electromagnetic spectrum with wavelengths longer than visible light but shorter than microwaves.
money paid in good health to guarantee financial or physical health if injury or damage occurs.
watering land, usually for agriculture, by artificial means.
carnivorous or bloodsucking worm.
(Light Detection and Ranging) method of detecting distant objects and determining their position, velocity, volume, or other characteristic by analysis of pulsed laser light reflected from their surfaces. Also called LADAR.
main circuit board in an electronic device, such as a computer, which may contain sockets that accept additional boards ("daughter-boards").
(singular: phenomenon) any observable occurrence or feature.
methods of information-gathering about the Earth's surface from a distance.
to look like.
object that orbits around something else. Satellites can be natural, like moons, or made by people.
specific place where something is located.
electronic programs of code that tell computers what to do.
group of cells that converts sunlight into electricity.
a study or analysis of characteristics of an area or a population.
the science of using tools and complex machines to make human life easier or more profitable.
organism that may soon become endangered.
a violently rotating column of air that forms at the bottom of a cloud and touches the ground.
existing in the tropics, the latitudes between the Tropic of Cancer in the north and the Tropic of Capricorn in the south.
(unmanned aerial vehicle) aircraft without a human pilot or other technician onboard.
all the plant life of a specific place.
(1956-1975) civil war in Vietnam, with the North Vietnamese supported by pro-communist nations and the South Vietnamese supported by anti-communist nations, which resulted in a northern (communist) victory and a split nation.