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Energy,Machines and Motion
EMM study guide
51
Science
7th Grade
04/21/2009

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Cards

Term
Forces that are equal and opposite are ...
Definition
balanced forces
Term
Friction is a force that...
Definition
opposes motion
Term
The interaction of gravity and air friction is called...
Definition
terminal velocity
Term
The ability to do work is called...
Definition
energy
Term
Fd=W
Definition
formula for work
Term
Anyone holding something steadily over their head ...
Definition
isn't working
Term
Complete circuit designs are called...
Definition
Parallel circuits
Term
As skydivers fall the "DRAG" force eventually...
Definition
equals the force of gravity
Term
In order to move objects you need
Definition
unbalanced forces
Term
Wet and Dry cell batteries must have an...
Definition
electrolyte
Term
During this century hybrid cars became popular...
Definition
20th century
Term
Scientists use the...
Definition
International metric system
Term
Independent variables on a graph go on the...
Definition
"X" axis
Term
The weight of an object involves...
Definition
gravitational force
Term
The unit of measure for power is...
Definition
the watt
Term
3.55 meters=
Definition
355 centimeters
Term
When using a battery charger, electrical energy is transformed to...
Definition
chemical energy
Term
In order to make a battery, 2_____ and an _____ solution paste are needed.
Definition
electrodes,electrolyte
Term
Draw a series circuitry on the back of this card...
Definition
Term
Draw a parallel circuitry on the back of this card...
Definition
Term
The factor that determines the force of friction on a block is...
Definition
the surface that the block comes in contact.
Term
The weight of an object is dependent on...
Definition
volume
Term
1.50N is one block double this and its speed will be...
Definition
3.00N
Term
A force can....
Definition
give an object energy,is a push or a pull,can change an object's motion,is measured in Newtons
Term
Sliding friction depends upon...
Definition
surfaces and weight
Term
When a battery is connected to a motor...
Definition
it transforms chemical energy into electrical energy and finally into mechanical energy
Term
10N at a steady pace while traveling 20N-m =....
Definition
a work output of 200N-m
Term
When you think of work you think of....
Definition
The Newton-meter,james Joule,moving an object at a distance
Term
The scientific defintion of is NOT...
Definition
holding a bag
Term
When a rubber band of 40cm is stretched and registers 20N on a spring scale, the scale will register____ when stretched twice as much
Definition
4.N
Term
Potential energy is defined as....
Definition
stored energy,energy at rest, also called gravitational potential energy
Term
Which measurements are neede to calculate the power of a crane being lifted to the top of a building....
Definition
work and time
Term
Power is the rate of doing work...
Definition
measured in watts,1kW =1,000watts,work(N-m)/Time(s)=Power(w)
Term
When a Newton spring scale is in the vertical position it measures...
Definition
the force of gravity
Term
Five elements needed to make a graph are...
Definition
title,labels on both X and Y axis,units of measure,plotted data numeric values and a key
Term
An energy transofmation that occured on the pegboards were...
Definition
chemical to electrical to mechanical to heat
Term
kinetic energy=
Definition
energy of motion
Term
mass=
Definition
amount of matter in an object
Term
velocity=
Definition
speed in a given direction
Term
weight=
Definition
amount of force exerted on an object due to gravity
Term
Newton=
Definition
unit of measure for force
Term
Watt=
Definition
unit of measure for power
Term
Joule=
Definition
same as Newton-meter
Term
gravity=
Definition
attractive force between 2 objects
Term
potential energy=
Definition
energy at rest
Term
Robert Hooke=
Definition
discovered elastic force and Cell theory
Term
Galileo Galilei=
Definition
Italian,invented telescope
Term
Alessandro Volta=
Definition
built 1st electric battery,Italian
Term
James Watt=
Definition
From scotland,improved steam engine
Term
Issac Newton=
Definition
English,discovered Laws of Motion
Term
electrode=
Definition
conductor metal strips in battery
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