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What Goes Up . . .
Universal Gravitation
| Question | Answer |
|---|---|
| gravity | a force of attraction between any two objects with mass |
| mass The amount of matter in an object; more mass means stronger gravity | the amount of matter in an object; more mass means stronger gravity |
| distance (gravity) | the space between two objects; as distance increases, gravity decreases |
| gravitational strength | how strong the force of gravity is between objects |
| air resistance a force that slows falling objects in Earth’s atmosphere | a force that slows falling objects in Earth’s atmosphere |
| center of mass | the point where an object’s mass is balanced |
| binary system | two objects orbiting each other due to gravity |
| satellite (natural), | a naturally occurring object that orbits a planet (like the Moon) |
| satellite (artificial) | a human-made object placed into orbit around Earth |
| gravitational field | the area around an object where gravity affects other objects |
| inverse relationship (distance) | as distance doubles, gravity becomes much weaker. |
| mass vs weight | mass stays constant; weight changes with gravity |
| orbit | the curved path an object follows around another object due to gravity |
| inertia | the tendency of an object to keep moving in a straight line unless acted on |
| Sun’s gravity | the force that keeps planets moving in orbit around the Sun |
| planetary motion | the movement of planets around the Sun in predictable paths |
| Moon’s orbit | the path the Moon follows around Earth due to gravity |
| Earth’s gravity | the measure of the force of gravity on an object |
| weight | the measure of the force of gravity on an object |
| free fall | when gravity is the only force acting on an object |
| acceleration due to gravity | the rate at which objects speed up when falling toward Earth (9.8 m/s²) |
| gravitational pull | invisible force drawing objects together |
| relationship (mass & gravity) | more mass = stronger gravitational force |
| relationship (distance & gravity) | greater distance = weaker gravitational force |
| why planets stay in orbit | balance between forward motion and gravitational pull |
| elliptical orbit | an oval-shaped orbit followed by planets |
| gravity and moons | gravity keeps moons orbiting planets |
| gravity on different planets | weight changes depending on a planet’s mass and size |
| escape velocity | the speed needed to break free from a planet’s gravity |
| microgravity | a condition where objects appear weightless (like in space) |
| gravity and falling objects | all objects fall at the same rate if air resistance is ignored |
| Newton’s law of gravity | all objects attract each other based on mass and distance |
| rotation | the spinning of an object on its axis (Earth rotates once every ~24 hours) |
| revolution | the movement of one object around another (Earth revolves around the Sun in about 365 days) |
Created by:
rdmonaghan
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