Review of Objective 4 vocabulary for 8th Grade STAAR test.
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| 12004647618 | Acceleration | The rate of change in velocity. Can be a change in direction, positive (speeding up) or negative (slowing down). |  | 0 |
| 12004647619 | Balanced Force | Two forces in opposite directions. Net force is zero and the motion of the object does not change. |  | 1 |
| 12004647620 | Friction | The force between objects that resists motion - always slows down motion |  | 2 |
| 12004647621 | Newton | A measurement of force | 3 | |
| 12004647622 | Magnitude | The strength or size of an object or force. | 4 | |
| 12004647623 | Mass | The total amount of matter in something. |  | 5 |
| 12004647625 | Force | A push or pull on an object that can cause a change in movement | 6 | |
| 12004647626 | Net Force | The total of all the forces acting on an object |  | 7 |
| 12004647627 | Gravity | A force that pulls objects together |  | 8 |
| 12004647628 | F = m x a | Formula for Force |  | 9 |
| 12004647629 | Displacement vs Time Graph | Shows the distance an object travels in a certain amount of time. slope is velocity |  | 10 |
| 12004647630 | Inertia | the tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force |  | 11 |
| 12004647632 | Motion | A change in the position of an object over time. |  | 12 |
| 12004647633 | Newton's First Law of Motion (Definition) | an object at rest will stay at rest unless acted upon by an outside unbalanced force; an object in motion will stay in motion unless acted upon by an outside unbalanced force. | 13 | |
| 12004647634 | Newton's First Law of Motion (Example) | when a car suddenly stops and your head continues to move foward even though your body is stopped by the seat belt |  | 14 |
| 12004647635 | Newton's Second Law of Motion (Definition) | the greater the force applied to an object, the greater the acceleration; the smaller the mass of an object, the greater its acceleration when force is applied; only an unbalanced force can cause objects to accelerate | 15 | |
| 12004647636 | Newton's Second Law of Motion (Example) | the force applied to a roller coaster car in addition to the mass of the car determines the acceleration of the car; more force = more acceleration | 16 | |
| 12004647637 | Newton's Third Law of Motion (Definition) | for every action there is an equal and opposite reaction; there is a reaction force that is equal in size but opposite in direction. | 17 | |
| 12004647638 | Newton's Third Law of Motion (Example) | as the thrust of a rocket pushes down on Earth's surface, the rocket launches upward into the atmosphere |  | 18 |
| 12004647642 | Example of velocity | Nemo swims 37 m/s South to Wallaby Way in Australia. |  | 19 |
| 12004647643 | Speed | the distance traveled by an object in a given amount of time. |  | 20 |
| 12004647644 | Example of speed | Nemo swims 58 m/s |  | 21 |
| 12004647645 | Unbalanced Force | A force that is not equal in size and opposite in direction. |  | 22 |
| 12004647646 | Velocity | speed of an object and its direction of motion; changes when speed, direction or both changes | 23 | |
| 12004647670 | Contact forces | Contact forces work when two or more objects are touching. Some examples of this are: friction, air resistance, tension in ropes and normal contact force. When these two or more objects interact there is a force on both of them and is equal or opposite of the other object. | 24 | |
| 12004647671 | Non-contact forces | Non-contact forces happen when two or more objects exert a force on each other but are not touching. Some examples of these are: magnetic force, gravitational force, electrostatic force. When these two or more objects interact with each other there is a force produced on all of them that is equal or opposite. | 25 | |
| 12004647679 | newton's law of gravitation | The force of gravity between two very dense objects can be described inversely by the distance between them. | 26 | |
| 12004647684 | vector | An quantity that has a magnitude and direction | 27 | |
| 12004647687 | acceleration | Change in velocity over change in time | 28 | |
| 12004647688 | velocity | change in displacement over change in time vector | 29 | |
| 12004647689 | displacement | the total distance traveled by an object regardless of direction | 30 | |
| 12004647690 | distance | the amount traveled from a certain spot. | 31 | |
| 12004647691 | newton's first law | law of inertia | 32 | |
| 12004647692 | newton's second law | F=ma | 33 | |
| 12004647693 | Newton's 3rd law | Every action has an equal and opposite reaction | 34 | |
| 12004647695 | This force goes in the opposite direction of motion | Friction | 35 | |
| 12004647696 | Frictional force | =coeffiecent of friction xmxg | 36 | |
| 12004647697 | A boat moving at 4m/s north, with a wind coming from the east at 3 m/s gives you a net vector of what? | 5m/s NE | 37 | |
| 12004647702 | Gravitational pull between object | the relationship where the force between to objects is inversely 1/r related to the distance between them. | 38 |
