Energy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Define direct current. | Current that does not reverse direction.
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| What is static charge? | Buildup of electrical charge on an object.
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| Define the Law of conservation of energy. | States that energy cannot be created nor destroyed, it can only change form.
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| What happens when you break an iron magnet into two pieces? | You get two whole magnets. Each with a north and south pole.
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| What is temperature? | The measure of the average kinetic energy of the particles in an object.
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| How are velocity and kinetic energy related? | If you increase velocity, you increase kinetic energy, and vice versa.
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| Define circuit. | A continuously flowing closed loop.
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| Why is cooper used in household wiring? | Because cooper has low resistance.
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| Which pole of a compass points to the geographic north pole? | The south pole.
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| What is an electromagnet? | A current carrying wire wrapped around an iron ore. It only operates when the current is on.
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| If you put your hand under an infrared lamp you can feel the heat. What form of heat transformation is that an example of? | Radiation.
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| What is the energy an object has due to its position? | Potential energy.
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| How do magnets attract one another? | The north pole of one attracts to the south pole of another... opposites attract.
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| What type of energy is "lost" in every energy transformation? | Thermal energy.
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| List 3 conductors of electricity. | Copper, gold, silver.
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| Where is the strongest magnetic field? | Around the magnetic poles.
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| What is a circuit breaker used for? | Designed to open an overloaded circuit and prevent overheating.
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| What kind of energy does a burning fire produce? | Radiant- light and thermal- heat.
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| Define conductor. | Materials that allows electrons to move through them easily.
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| What makes an electric field get stronger? | The closer you get to a charge the stronger it gets.
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| Define alternating current. | Current that reverses direction in a regular pattern.
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| Define series circuit. | A path created for a current that only allows one route for the current.
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| How can you increase the strength of an electromagnet? | By increasing the number of turns on the wire coil so that more current can flow.
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| Define insulator. | Material in which electrons cannot move easily from place to place.
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| Define parallel circuit. | Circuit that has two or more paths for electrons to flow.
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| How is temperature related to the speed of molecules? | The higher the temperature, the faster the molecules.
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| What happens if you change the current of an electromagnet? | Changing the current changes the strength and direction of an electromagnet.
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| Why are atoms normally electrically nuetral? | Because there are equal numbers of protons and electrons.
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| Define electric current. | The steady flow of electrons through a conductor.
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| What happens if you move a wire through a magnetic field? | It creates an electric current.
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| kinetic energy | The energy an object has due to its motion.
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| potential energy | the energy an object has due to its position.
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| mechanical energy | The total energy of motion and position of an object.
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| Thermal energy | The total potential and kinetic energy of the particles that make up an object.
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| chemical energy | Potential energy stored in the chemical bonds that hold compounds together.
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| radiant energy | Energy carried by an electromagnetic wave.
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| electrical energy | The energy of moving electrons.
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| Sound energy | Energy caused by an object's vibration.
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| Nuclear energy | Energy stored in the nucleus of an atom.
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| Law of Conservation of Energy | States that energy is neither created nor destroyed, it only changes form.
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| Temperature | A measure of the average kinetic energy of the molecules.
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