a push or a pull exerted on an object
The force that directly opposes the weight of an aircraft and holds the aircraft in the air.
the pushing or pulling force exerted by the engine of an aircraft or rocket
the ability to do work.
the layer closest to Earth, where almost all weather occurs; the thinnest layer; contains 75% of atmospheric gases and 99% of water vapor; where life exists. Temperature goes down as one rises through the troposphere.
the layer of the atmosphere that contains the ozone layer; temperature increases as you go up
the layer of the atmosphere between the stratosphere and the thermosphere and in which temperature decreases as altitude increases. Meteorites can burn out in this layer.
The thickest layer of the atmosphere, in which temperature increases as altitude increases.
The outer layer of the thermosphere, extending outward into space.
a unit of length used for distances within the solar system, which is the average distance between Earth and the sun, about 150 million kilometers.
Light distance travels in one year (9.5 trillion km). Used to measure distances between stars and galaxies.