Physical Science Final

Front 1

Scientific method

Back 1

And organize set of investigation procedures

Front 2

Hypothesis

G

Back 2

A possible explanation for a problem using what you know and what you observe

Front 3

Experiment

Back 3

Tests the fact of one thing or another using controlled conditions

Front 4

Variable

Back 4

A quantity that can have more than a single value

Front 5

Dependent variable

Back 5

The value changes according to the changes in other variables

Front 6

Independent variable

Back 6

The variable you change to see how it will affect the dependent variable

Front 7

Constant

Back 7

A factor that does not change when other variables change

Front 8

Control

Back 8

The standard by which the test results can be compared

Front 9

Bias

Back 9

A bias occurs when what do scientist expect changes how the results are viewed

Front 10

Model

Back 10

Represents an idea event or object to help people Better understand it

Front 11

Distance

Back 11

The motion of an object and how far it’s moved

Front 12

Displacement

Back 12

The distance and direction of an objects change in position from the starting point

Front 13

Speed

Back 13

The distance and object travels per unit of time

Front 14

Average speed

Back 14

The total distance traveled divided by the total time of travel

Front 15

Instantaneous speed

Back 15

The speed at a given point in time

Front 16

Theory

Back 16

An exclamation of things or events based on on knowledge gained from many observations and investigations

Front 17

Scientific law

Back 17

A statement about what happens in nature and that seems to be true all the time

Front 18

Technology

Back 18

The application of science to help people

Front 19

Standard

Back 19

And exact quantity that people agree to use to compare measurements

Front 20

SI

Back 20

SI standards are universally excepted and understood by scientist throughout the world

Front 21

Volume

Back 21

The amount of space occupied by an object

Front 22

Mass

Back 22

The measure of the quantity of matter in an object

Front 23

Density

Back 23

The mass per unit volume of a material

Front 24

Graph

Back 24

A visual display of information or data

Front 25

Velocity

Back 25

The speed of an object in the direction of its motion

Front 26

Acceleration

Back 26

The rate of change of velocity

Front 27

Force

Back 27

Push or pull

Front 28

Net force

Back 28

When two or more forces acting on an object at the same time

Front 29

Balanced forces

Back 29

Forces on an object that are equal in size and opposite in direction

Front 30

Inertia

Back 30

The tendency of an object to resist any change in its motion

Front 31

Friction

Back 31

The force that opposes the sliding motion of two services that are touching each other

Front 32

Static friction

Back 32

The frictional force that prevents to services from sliding past each other

Front 33

Sliding friction

Back 33

The force that opposes the motion of two shippers is sliding past each other

Front 34

Air resistance

Back 34

Opposes the motion of objects that moved to the air

Front 35

Gravity

Back 35

And attractive force between any two objects that depends on the masses of the objects and the distance between them

Front 36

WEIGHT

Back 36

The gravitational force exerted on an object

Front 37

Centripetal acceleration

Back 37

Celebration toward the centre of a curved or circular path

Front 38

Centripetal force

Back 38

The net force exerted toward the center of a curved path

Front 39

momentumjoule

Back 39

The product of its mass and velocity

Front 40

Kinetic energy

Back 40

The energy a moving object had because its motion

Front 41

Joule

Back 41

SI unit of energy

Front 42

Potential energy

Back 42

Stored energy due to position

Front 43

Elastic potential energy

Back 43

Energy stored by something that can stretch or compress such as a rubber band or spring

Front 44

Chemical potential energy

Back 44

Energy stored in chemical bonds

Front 45

Gravitational potential energy

Back 45

Energy stored by objects due to their position above Earth surface

Front 46

Mechanical energy

Back 46

The total amount of potential and kinetic energy in a system

Front 47

Law of conservation of energy

Back 47

States that energy cannot be created or destroyed

Front 48

Work

Back 48

The transfer of energy that occurs when a force makes and object move

Front 49

Power

Back 49

The amount of work done in one second

Front 50

Machine

Back 50

A device that makes doing work easier

Front 51

Input force

Back 51

Force applied to the machine

Front 52

Output force

Back 52

Force applied by the machine

Front 53

Mechanical advantage

Back 53

Ratio of the output force to the input force

Front 54

Efficiency

Back 54

A measure of how much of the work put into a machine is changed into useful output work by the machine

Front 55

Simple machine

Back 55

A machine that does work with only one movement

Front 56

Wheel and axle

Back 56

A simple machine consisting of a shaft or axle attached to the center of a larger wheel

Front 57

Compound machine

Back 57

Two or more simple machines that operate together

Front 58

Heat

Back 58

Thermal energy that flows from something at a higher temperature to something at a lower temperature