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Physical Science final cards
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109
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7th Grade
01/26/2010

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Term
The gathering of new information;the discovery of a new relationship of fact.
Definition
Pure Science
Term
The practical use of scientific information
Definition
Technology
Term
What are the tree categories of Science
Definition
Life Science, Physical Science Earth Science
Term
The study of matter and energy
Definition
Physical Science
Term
A situation in which something appears to be missing
Definition
Problem
Term
The steps required to find the solution are usually obvious
Definition
Exersise
Term
Using your senses to gather information
Definition
observation
Term
A testable prediction
Definition
Hypothesis
Term
This is used to test a hypothesis
Definition
Experiment
Term
An explanation based on many observations supported by experimental results
Definition
Teory
Term
A rule of nature that sumes up related observations and experimental results to discribe a pattern in nature
Definition
Scientific Law
Term
These people gather information from observations
Definition
Scientists
Term
A standard for comparison
Definition
Control
Term
A factor that doesn't vary in an experiment
Definition
Constant
Term
The factor adjusted by the experimenter
Definition
Independent variable
Term
a factor whose value depends upon the value of the independent variable
Definition
Dependent variable
Term
Name all 5 steps in the Scientific method
Definition

- Purpose                    - Analyze

- Make a Hypothesis    - Conclusion

- Research

- Experiment

Term
A device that makes work easier
Definition
Machine
Term
A device that does work with one movement
Definition
Simple machine
Term
Name all 6 simple machines
Definition

lever pulley

wheel and axil inclined plane

screw wedge

Term
The force applied to overcome resistance force
Definition
Effort force
Term
the force applied to overcome the effort force
Definition
Resistance force
Term
Work done on the machine
Definition
Work input (Win)
Term
Work done by the machine
Definition
Work Output (Wout)
Term
The number of times a machine multiplies the effort force
Definition
Mechanical Advantage (MA=Fr/Fe)
Term
This lever has a MA that is less than one
Definition
3rd class lever
Term
A lever that is free to pivot of turn about a fixed point
Definition
lever
Term
What is the fixed point on a lever called?
Definition
Fulcrum
Term
From the fulcrum to the effort force
Definition
Effort arm
Term
From the fulcrum to the resistance force
Definition
Resistance arm
Term
Where are all the parts of a 1st class lever
Definition

Resistance        Fulcrum            Effort 

Force                                        Force

Term
Where are the parts located for a 2nd class lever
Definition

Fulcrum Resistance Effort

   force  force

Term
Tell where the parts of a 3rd class lever are
Definition

Resistace Effort Fulcrum

    Force  force

Term
A grooved wheel with a rope or a chain running along the groove
Definition
Pulley
Term
What kind of lever is a pulley?
Definition
1st class lever
Term
This kind of pulley attached to something that doesn't move, such as the ceiling, wall, or tree
Definition
Fixed pulley
Term
Fixed and moveable pulleys can be combined to make a system of pulleys called a...
Definition
Block and Tackle pulley
Term
A simple machine consisting of two wheels of different sizes that rotate together
Definition
Wheel and axil
Term
A wheel with teeth along its circumfrence
Definition
gear
Term
A sloping surface used to raise objects
Definition
inclined plane
Term
An inclined plane wrapped around in a spiral around a cylender or post
Definition
screw
Term
An inclined plane with one or two sloping sides
Definition
wedge
Term
The science of disigning artificial replacement parts for humans
Definition
bionics
Term
What is an artificial replacement called?
Definition
prosthetic
Term
A combination of two or more simple machines
Definition
Term
An exact quantity that people agree to use for comparison
Definition
Standard
Term
The standard system of mesurement used world wide
Definition
SI
Term
In SI, each type of mesurement has a...
Definition
base unit
Term
SI is used in... for simplicity
Definition
powers of 10
Term
What measurement do astronauts use to measure things distance in space
Definition
light year
Term
How many miles are in a light year?
Definition
9.5 trillion
Term
What is the base unit for length?
Definition
Meter
Term
What is the base unit for mass?
Definition
Kilogram
Term
What is the base unit for time?
Definition
seconds
Term
What is the base unit for temperature?
Definition
Kelvin
Term
The amount of space occupied by an object.
Definition
Volume
Term
Units obtained by combining SI units are called...
Definition
derived units
Term
The most common unit for expressing liquid volumes
Definition
Liter
Term
A measure of the matter in an object
Definition
Mass
Term
The mass and volume of an object can be used to find the...
Definition
Density
Term
The interval between two events
Definition
Time
Term
A visual display of information of data
Definition
Graph
Term
This type of graph is used to show trends or how data changes over time
Definition
Line Graph
Term
In a line graph, the dependent variable is always plotted on which axis
Definition
Y-axis
Term
In a line graph, the dependent variable is plotted on which axis
Definition
X-axis
Term
This graph is useful of information collected by counting
Definition
Bar Graph
Term
This graph is useful to show how some fixed quantity is broken down into parts. (Percentages) 
Definition
Pie graph of Circle graph
Term
The best way to discribe speed is to use an...
Definition
Average Speed
Term
The relationship between distance, speed, and time is shown in which equation
Definition
d = v(t)
Term
This describes both speed and direction of an object
Definition
Velocity
Term
The rate of change of velocity
Definition
Acceleration
Term
The amount of aceleration depends on both the change in velocity and the...
Definition
Time Interval
Term
You can calculate Acceleration in the equation...
Definition

A = Vf - Vi

      t

Term
Velocity is measured in what unit
Definition

(m/s)

(meters/seconds)

Term
A push of pull one body exerts on another
Definition
Force
Term
Forces on an object that are equal in size and opposite in direction
Definition
Balanced Forces
Term
A ... on an object always changes the velocity of the object
Definition
net force
Term
The tendency of an object to resist any change in its motion
Definition
Inertia
Term
This law of motion states that an object moving at a constant speed keeps moving until a net force acts on it
Definition
Newton's 1st law of motion
Term
The force that opposes motion
Definition
Friction
Term
Every object exerts a force on every other object. What is it called?
Definition
Gravity
Term
What 2 things does the amount of gravitational force depend on?
Definition
Their masses ant the distance between them
Term
The measure of the force of gravity on an object is the objects...
Definition
Weight
Term
This law of motion says that a net force acting on an object causes the object to accelerate in the direction of the force
Definition
Newton's 2nd law of motion
Term
Newton's Second law of motion can be summed up in this equation
Definition

F = m(a)

(Force = mass X acceleration)

Term
The force air exerts on a moving object
Definition
Air Resistance
Term
The highest velocity that will be reached by a falling object
Definition
Terminal Velocity
Term
Anything that is thrown or shot through the air is called a...
Definition
Projectile
Term
When you throw a ball the force from your hand makes the ball move forward. This gives the ball...
Definition
Horizontal Motion
Term
Gravity starts pulling a ball downward giving it...
Definition
Vertical Motion
Term
Acceleration toward the center of a curved or circular path is called...
Definition
Centripetal Acceleration
Term
... is a force action tword the center of a curved of circular path
Definition
Centripetal Force
Term
Human made divices that orbit the earth for a specific purpose is called a...
Definition
Artificial Satilite
Term
This law of motion discribes action reaction pairs
Definition
Newton's Third law of motion
Term
A property a moving object has because of its mass and velocity
Definition
Momentum
Term
The ability to cause change
Definition
Energy
Term
This is energy in the form of movement
Definition
Kenetic Energy
Term
This is stored energy
Definition
Potential Energy
Term
The transfer of energy through motion is...
Definition
Work
Term
What equation can best sum up Work
Definition

W = f(d)

(Work = Force X Distance)

Term
The total amount of kenetic energy and potential energy in a system is called...
Definition
Mechanical energy
Term
The average mesure of the kenetic energy of the particles in a sample of matter
Definition

 

Temperature

Term
The total energy of the particles that make up matter
Definition

 

Thermal Energy

Term
The thermal energy that flows from something with a lower temperature
Definition
Heat
Term
This occures when waste heat significantly changes the temperature of the environment
Definition
Thermal Polution
Term
The transfer of energy through matter that is made by direct contact of the particles
Definition
Conduction
Term
Anything that flows can be considered a...
Definition
Fluid
Term
The transfer of energy by the bulk movement of matter
Definition
Convection
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