Astronomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| speed | how far an object will travel in a certain amount of time
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| velocity | how far and in what direction an object will travel
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| acceleration | change in velocity
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| acceleration of gravity | acceleration of a falling object in m per sec
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| momentum | product of mass times velocity
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| force | change applied to an object's momentum
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| net force | overall force acting on an object
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| angular momentum | circular momentum
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| torque | twisting force that can change an objects angular momentum
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| mass | amount of matter
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| weight | force that a scale measures
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| free-fall | falling without resistance
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| weightlessness | in a state of free-fall
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| Newton's First Law | An object moves at constant velocity if there is no net force acting upon it
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| Newton's Second Law | Force = mass x acceleration (F=ma)
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| Newton's Third Law | For any action, there is an equal and opposite reaction
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| conservation of momentum | total momentum of interacting objects cannot change
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| conservation of angular momentum | as long as there is no external torque, the total angular momentum of interacting objects cannot change
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| conservation of energy | energy cannot appear out of nowhere or disappear into nothing
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| kinetic energy | energy of motion
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| radiative energy | energy carried by light
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| potential energy | stored energy
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| thermal energy | collective kinetic energy moving within a substance
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| temperature | measures average kinetic energy of particles
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| gravitational potential energy | how much mass an object has and how far it can fall
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| mass-energy | energy contained in mass itself (E=mc^2)
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| law of gravitation | Fg = GM1M2/d^2
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| bound orbit | ellipse
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| unbound orbits | ellipse, parabola, hyperbola
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| gravitational encounter | when two objects pass close enough to exchange orbital energy
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| escape velocity | amount of energy needed by an object to clear a gravitational field of orbit
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| tidal force | difference in gravitational forces that causes two tidal bulges
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| tidal friction | tidal forces stretching the earth
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| synchronous rotation | moon always shows the same face to Earth because of tidal friction
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
sgw005
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