Across
- 3. material whose energy is used to create electricity; moving water, fossil fuels (coal, oil, natural gas), uranium, wind, and the Sun are all sources of electrical energy; also, the device that supplies electrical energy to operate any electrical device; for example, a battery or an outlet
- 5. the unit used to measure resistance in an electric circuit
- 6. the type of electrical charges that are left behind when negative charges are rubbed off a material; the type of charge on protons
- 7. a label that shows about how much energy an appliance uses in one year of normal use
- 10. material that does not allow heat and electricity to move through it easily; often made of plastic or rubber
- 11. a device for testing an object to find out if it is charged
- 13. an object that has an equal number of positive charges and negative charges
- 17. connecting a conductor to Earth’s surface so that charges can flow safely to it
- 19. a measure of how much a load pushes against a current in an electrical circuit
- 20. state of an object when it has lost its excess charge
- 21. the part of an electrical circuit that requires electricity to work; an oven, a light bulb, and a computer are all examples
- 22. the connection of a source, a load, and a conductor that allows a current to flow
- 24. a source of energy, such as fossil fuels and uranium, that cannot be replaced or restocked in a human lifetime
- 27. a flow of electrical charges
- 28. an electrical circuit that has only one path for the current to follow; the current is the same at every point in the circuit
Down
- 1. the unit of measure that describes the amount of current flowing through a wire in an electrical circuit
- 2. a source of energy, such as water, that can be replaced or restocked in a human lifetime
- 4. describes how easily a substance lets heat or electricity move through it
- 6. a circuit that has two or more paths for the current to follow; the current in each branch in this type circuit is less than the current through the source; the potential difference in each branch is the same as the potential difference of the source
- 8. a method of charging: causing a neutral object to become charged by bringing a charged object near to, but not touching, the object
- 9. a device that measures potential difference
- 12. used to describe the amount of energy a source can provide; the potential difference across a source is the difference between the energy of a unit of charge entering one end of a source, and the energy of a unit of charge leaving the other end of the source;
- 14. a material that lets heat and electricity move through it easily; usually metals
- 15. a label on an electrical appliance that means that the appliance or equipment meets or exceeds the government standards for electrical efficiency
- 16. a safety device that is found in older buildings and some appliances; contains a piece of metal that melts if too much current flows through it
- 18. a safety device that keeps a circuit from carrying too much current and starting a fire; a set of large black switches
- 23. a method of charging: causing a neutral object to become charged by touching it with a charged object
- 25. the type of electrical charges that can be rubbed off a material; the type of charge on an electron
- 26. a device that measures the current in an electrical circuit