| A | B |
|---|
| A push or pull exerted on an object | Force |
| The overall force on an object when all the individual forces acting on an object are added together | Net force |
| A nonzero net force that changes an object's motion | Unbalanced forces |
| Equal forces acting on an object in opposite directions | Balanced forces |
| The tendency of a moving object to continue in a straight line or a stationary object to remain in place | Inertia |
| A unit of measure that equals the force required to accelerate one kilogram of mass at a rate of one meter per second | Newton |
| A force that one surface exerts on another when the two rub against each other | Friction |
| Friction that occurs when one solid surface slides over another | Sliding friction |
| Friction that occurs when an object rolls over a surface | Rolling friction |
| Friction that occurs as an object moves through a fluid | Fluid friction |
| The force that pulls objects toward each other | Gravity |
| The motion of a falling object when the only force acting on it is gravity | Free fall |
| An object that is thrown | Projectile |
| The fluid friction experienced by objects falling through air | Air resistance |
| The maximum velocity a falling object achieves | Terminal velocity |
| The product of an object's mass and its velocity | Momentum |
| The rule that the total momentum of objects in an interaction does not change | Law of Conservation of Momentum |
| Any object that travels around another object in space | Satellite |
| A force that causes an object to move in a circle | Centripetal force |
| The force exerted on a surface divided by the total area over which the force is exerted | Pressure |
| A unit of pressure equal to one newton per square meter | Pascal |
| Any substance that can flow and easily change shape | Fluid |
| The rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid | Pascal's principle |
| A system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area | Hydraulic system |
| The upward force exerted by a fluid on a submerged object | Buoyant force |
| The rule that the buoyant force on an object is equal to the weight of the fluid displaced by that object | Archimedes' principle |
| The rule that a stream of fastmoving fluid exerts less pressure than the surrounding fluid | Bernoulli's principle |
| When an object's distance from another object is changing | Motion |
| How fast does Earth orbit the sun? | 30 km/second |
| A place or object used for comparison to determine if something is in motion | Reference point |
| Liters, meters, and grams are all | Units of measurement |
| The basic SI unit of length is the | Meter |
| The basic SI unit of mass is | Gram |
| The basic SI unit of volume is | Liter |
| The International System of Units is used | World-wide |
| If you know the distance an object has traveled in a certain amount of time, you can determine | Speed of object |
| If you know the speed an object traveled a certain amount of time you can determine the | Distance traveled |
| If you know the speed traveled and the distance traveled by an object you can determine | Amount of time |
| Speed equals distance divided by | Time |
| Time equals distance divided by | Speed |
| Distance equals time multiplied by | Speed |
| Distance equals speed multiplied by | Time |
| If the speed of an object does NOT change, the object is traveling at a(n) | Constant speed |
| If a bicyclist travels 30 kilometers in two hours, her average speed is | 15 km/hour |
| If you know a car traveled 100 kilometers in 2 hours, you can find its | Average speed |
| If you know a car traveled 100 kilometers in 2 hours, what is its average speed? | 50 km/h |
| A train that travels 200 kilometers in 4 hours is traveling at what average speed? | 50 km/h |
| You can show the motion of an object on a line graph in which you plot distance against | Time |
| You can show the motion of an object on a line graph in which you plot time against | Distance |
| In graphing motion, the steepness of the slope depends on | The speed of the object |
| On a graph showing distance versus time, a horizontal line represents an object that is | Not moving at all |
| On a graph showing distance versus time, an object that does not move will have what kind of slope to its line? | No slope |
| On a graph showing distance versus time what kind of line would represent an object that is accelerating? | Sloping upward |
| On a graph showing distance versus time what kind of line would represent an object that is decreasing its speed? | Sloping downward |
| If an glacier moves 10 centimeters every year, how far will it move in 500 years? | 50 meters |
| If a turtle moves 15 meters every day how far will it move in 3 days? | 45 meters |
| In a conversion factor, what is special about the fraction used? | The denominator and numerator are equal |
| In the conversion factor that has a denominator of 50, what is the numerator? | 50 |
| In a conversion factor where the numerator is 100, the denominator is | 100 |
| What is the rate at which velocity changes? | Acceleration |
| What changes if the object is changing direction but not changing speed? | Velocity |
| When the moon orbits Earth, its ____________ changes | Velocity |
| The determine the acceleration rate of an object, you must calculate the change in velocity during each unit of | Time |
| In an acceleration graph showing speed versus time, a straight line shows the acceleration is | Constant |
| In an acceleration graph showing speed versus time, a line curving up shows the acceleration is | Increasing |
| In an acceleration graph showing speed versus time, a line curving downward shows the acceleration is | Decreasing |
| A place or object used for comparison to determine if an object is in motion. | Reference point |
| The state in which one object's distance from another is changing. | Motion |
| The distance an object travels in one unit of time. | Speed |
| Speed in a given direction. | Velocity |
| The steepness, or slant of a line on a graph. | Slope |
| The rate at which velocity changes. | Acceleration |
| One of the major pieces that make up Earth's upper layer p. 296 | Plate |
| Term used to describe a relationship between variables whose graph is a straight line p. 306 | Linear |
| Term used to describe a relationship between variables whose graph is not a straight line p. 306 | Nonlinear |
| Base unit of length in the System International | Meter |
| The state in which one object's distance from another is changing. | Motion |
| A place or object used for comparison to determine if an object is in motion. | Reference point |
| The distance an object travels in one unit of time. | Speed |
| Speed in a given direction. | Velocity |
| The steepness, or slant of a line on a graph. | Slope |
| The rate at which velocity changes. | Acceleration |
| One of the major pieces that make up Earth's upper layer p. 296 | Plate |
| Term used to describe a relationship between variables whose graph is a straight line p. 306 | Linear |
| Term used to describe a relationship between variables whose graph is not a straight line p. 306 | Nonlinear |
| Base unit of length in the System International | Meter |
