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Electricity Test '10 Before Spring Break
Any one share!? I have some made!
23
Science
7th Grade
03/10/2010

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Term
kinetic energy
Definition
energy of motion(waves, electrons, atoms, molecules, substances, and objects.
Term
Potential energy
Definition
stored energy and the energy of position-gravitational energy. There are several forms of potential energy.
Term
Electrical Energy
Definition
the movement of electrical charges. Everything is made of tiny particles called atomsAtoms are made of even smaller particles called electrons, protons, and neutrons. Applying a force can make some of the electrons move. Electrical charges moving through a wire is called electricity. Lightning is another example of electrical energy.
Term
Radiant Energy
Definition
electromagnetic energy that travels in transverse waves. Radiant energy includes visible light, x-rays, gamma rays and radio waves. Light is one type of radiant energy. Solar energy is an example of radiant energy
Term
Thermal energy
Definition
heat, is the internal energy in substances––the vibration and movement of the atoms and molecules within substances. Geothermal energy is an example of thermal energy
Term
Motion Energy
Definition
the movement of objects and substances from one place to another. Objects and substances move when a force is applied according to Newton’s Laws of Motion. Wind is an example of motion energy. Sound is the movement of energy through substances in longitudinal (compression/rarefaction) waves. Sound is produced when a force causes an object or substance to vibrate––the energy is transferred through the substance in a wave.
Term
Sound
Definition
the movement of energy through substances in longitudinal (compression/rarefaction) waves. Sound is produced when a force causes an object or substance to vibrate––the energy is transferred through the substance in a wave.
Term
Chemical Energy
Definition
energy stored in the bonds of atoms and molecules. It is the energy that holds these particles together. Biomass, petroleum, natural gas, and propane are examples of stored chemical energy.
Term
Stored Mechanical Energy Energy
Definition
energy stored in objects by the application of a force. Compressed springs and stretched rubber bands are examples of stored mechanical energy.
Term
Nuclear Energy
Definition
energy stored in the nucleus of an atom––the energy that holds the nucleus together. The energy can be released when the nuclei are combined or split apart. Nuclear power plants split the nuclei of uranium atoms in a process called fission. The sun combines the nuclei of hydrogen atoms in a process called fusion. Scientists are working on creating fusion energy on earth, so that someday there might be fusion power plants.
Term
Gravitational Energy
Definition
the energy of position or place. A rock resting at the top of a hill contains gravitational potential energy. Hydropower, such as water in a reservoir behind a dam, is an example of gravitational potential energy.
Term
What is energy and where does it come from?
Definition
Energy is the ability to do work, and it comes from changes within the atmosphere, and life.
Term
What is electricity? where does it come from and how does it get to our homes?
Definition
Electricity is the movement of electrons between atoms. It is a FORM of energy. It is generated at a power plant. It is then sent out to a transformer station that increases the voltage . Then, it travels through the province through transmission lines. Electricity is carried to a neighborhood through distribution wires. The box on the pole, the transformer, decreases the voltage before it gets to your home.
Term
What is the relationship between electricity and the Earth? How are energy and electricity related?
Definition
Natural resources/occurences within the Earth's atmoshphere such as wind, sun, and water are used to produce electricity when they drive generators. Electricity is a form of Energy. But Energy is NOT a form of electricity.
Term
How do earth's resources create electricity?
Definition
things such as wind, water, and the sun, which are all natural resources can be used to generate electricity by solar power, hydroelectric power(water power) or wind power . The movement of these in the atmosphere are used to drive a generator in some way.
Term
What does the phrase "global energy crisis" mean? What is your responsibility as a global citizen?
Definition
Is the overuse of fossil fuels in the world. It means that the fossil fuels, oil, coal, and gas, are nonrenewable resources, which means that there is not an endless amount of them. That is why there is a crisis due to the overuse of them. I can do my part by using green energy. Possibly shutting off the lights when I leave the room, and to turn off appliances that use electricity that is generated from burning fossil fuels.
Term
What is electricity?
Definition
The movement of electrons between atoms. Opposites attract! Electricity flows from negative to positive. Negative to negative repell each other.
Term
Types of Electricity?
Definition
Statis Electricity: Stays in one place
Current Electricity: Flow of movement of electric charge accross an electrical field.
Term
Resistance
Definition
A measure of how well something conducts electricity
Term
Insulators
Definition
Some things hold their electrons very tightly. Electrons do not move through them very well. These things are called insulators. Rubber, plastic, cloth, glass and dry air are good insulators and have very high resistance.
Term
Conductors
Definition
Other materials have some loosely held electrons, which move through them very easily. These are called conductors. Most metals -- like copper, aluminum or steel -- are good conductors.
Term
What allowed the piece of tinsel to "float" or rise above the Fun Fly Stick? Repulsion of charges?
Definition
When the button in the Fun Fly Stick was pressed, it generated a negative charger that was released, and the tinsel already has a negative charge, which meant that the atoms gained electrons and had more negative particles in it. These to were very close to each other, and due to their mutual charges, the repelled each other.
Term
How does a generator work?
Definition
Converts mechanical energy (turning movement) to electrical energy
When a conductor (such as copper wire) is moved through a magnetic field, electric current is produced and will flow through conductor
Why? Magnets apply pressure to move electrons!
Happens when you move a magnet in a coil of wire!
Video: Make your own generator!
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