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