Principles of Science Chapter 1 3
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What's Newton's first law of motion?
Objects moving at a Constant velocity keeps moving unless an unbalanced net force acts on it

net force
A Combination of forces Acting on an object.

inertia
The tendency of an object to resist a change in motion

force
Push or pull on an object

balanced force
Equal but opposite forces acting on an object

negative acceleration
The acceleration of an object that is slowing down

Positive acceleration
The acceleration of an object that is Speeding up

Acceleration
The rate of Change in velocity

Graph
A visual display of Information or data

Velocity
A measure of speed Of an object and the direction it is traveling

Speed
The distance an object travels in an amount Of time

Instantaneous speed
the speed of an object at one point in time

distance
A measure of how far an object has moved

displacement
the distance and direction that something moved from a starting point

Average speed
the total distance traveled in a unit of time

The formula for density
 mass
 density= 
 volume

V = l x w x h
The formula for volume
volume = length x width x height

nano
The SI prefix for one billionth
(0.000 000 001)

micro
The SI prefix for one millionth
(0.000 001)

milli
The SI prefix for one thousandth
(0.0001)

centi
The SI prefix for one hundredth
(0.01)

deci
The SI prefix for one tenth
(0.1)

kilo
The SI prefix for one thousand
(1,000)

What is SI
The International System of Units, which is based on multiples of ten

Candela
The SI measure for the intensity of light
symbol (cd)

Mole
The SI measure for amount of substance
symbol (mol)

Kelvin
The SI measure for temperature
sysmbol (K)

Ampere
The SI measure for electric current
symbol (A)

Meter
The SI measure for length and/or distance
symbol (m)

Kilogram
The SI measure for mass
symbol (kg)

second
The SI measure for time
symbol (s)

The formula for speed

 distance
 speed = 
 time

What is the formula to calsulate average speed?
 The formulas is:
 total distance
 average speed=  total time

The fomula for acceleration
 change in velocity
 acceleration = 
 time

What is the formula to calculate change in velocity?
The formula is:
 change
 in = final  initial
 velocity velocity velocity

What are the SI base units of measure?
 meter
 kilogram
 second
 kelvin
 mole
 candela

standard
An exact quanity that people agree to use to compare mesurements

Earth Science
The investigation of earth and space.

Physical sciense
Thy study of energy and matter that is scientific in nature

Life Science
The study of living things

What are the three main categories of science?
 Life science
 Earth science
 Physical sciense

technology
The application of science to help people

scientific law
A statement about what happens in nature that seems true all the time

Model
Anything that represents an idea, event or object to improve understanding

bias
What is expected cjanges how results are viewed

Hypothesis
An explanation for a question or problem based on what you know and observe.

mass
the measrement of the quantity of matter in a object

density
The mass per unit volume of material


An investigation that tests a hypothesis by collecting information under controlled conditions

What are the stpes of the scientific method?
 State the problem
 Gather Information
 From Hypothesis
 Test Hypothesis
 Analyze Data
 Hypothesis or Hypothesis
 not supported
 supported

Scientific Method
The steps a scientist follows when preforming an investigation

Control
A standard in an experiment against which results are compared

Constant
A condition in an experiment that dose not change

Independent Variable
In an experiment, the condition that is tested

Dependent Variable
The condition in an experiment that results from the changes made to the independent variable

Variable
A quantity that can have more that one value

Scientia
The latin word for knowledge

List the three way velocity can change.
 change in direction
 change in speed
 change in motion

What is Newton's second law of motion?
The net force acting on an object causes the object to accelerate in the direction of the net force.

Terminal velocity
The highest speed a falling objest can reach

Friction
A force that opposes the slliding motion of two srufaces that a are touching each other

Air resistance
A force that opposes the movement of objects through air

Sliding friction
the force that opposes the motion of two surfaces sliding past each other

Static friction
the force that keeps two surfaces at rest from sliding over each other

What is the formula to find acceleration when force and mass are known?
 net force
 acceleration = 
 mass

What is the fromula to find force when mass in know?
net force = mass x acceleration

Gravity
An attractive force between two objects

What is the law of Universal Gravitation?
Allow us to find the force of gravity beween any two objects if their masses ans the distance beween them are known.

Weight
The gravitational force exerted on an object

Centripetal acceleration
Acceleration toward the center of a curved path.

Centripetal force
The net force exerted toward the center of a curved path

What is Newton's third law of motion?
To every action force ther is an equal and opposite reaction force.

momentum
the product of a moving object's mass and velocity

What is the fromula for momentum?
momentum = mass x velocity