| 1. A(n) ___________ is used to stop current flow through a circuit. | |
| a) | insulator | b) | conductor | c) | switch | d) | dry cell |
| 2. The rate of a chemical reaction can be changed by _________. | |
| a) | temperature | b) | stirring | c) | catalysts | d) | all of these |
| 3. Static electricity can be transferred by a(n) _______. | |
| a) | insulator | b) | proton | c) | conductor | d) | switch |
| 4. In a(n) _____ circuit, the current has only one path to follow. | |
| a) | parallel | b) | open | c) | switched | d) | series |
| 5. A laser produces light that __________. | |
| a) | is not focused | b) | has one frequency | c) | has many colors | d) | is highly scattered |
| 6. The path a current follows through a conductoris a ________. | |
| a) | ground | b) | circuit | c) | short circuit | d) | switch |
| 7. Static electricity is a(n) _______ that is built up in one place. | |
| a) | resistance | b) | voltage | c) | current | d) | electric charge |
| 8. Radio waves are ______ waves that travel through space. | |
| a) | mechanical | b) | echo | c) | eletromagnetic | d) | compressional |
| 9. A(n) ____ is a material through which electrons can not flow easily. | |
| a) | insulator | b) | conductor | c) | switch | d) | dry cell |
| 10. A(n) _______ is the rapid transfer of static electricityfrom one object to another. | |
| a) | short circuit | b) | static discharge | c) | electric field | d) | current |
| 11. A ________ mirror is curved like the inside of a bowl. | |
| a) | plane | b) | concave | c) | convex | d) | refracting |
| 12. Waves that transmit energy through empty space are _________ waves. | |
| a) | electric | b) | mechanical | c) | magnetic | d) | eletromagnetic |
| 13. A substance that changes the rate of a chemical is a (n)______. | |
| a) | ion | b) | catalyst | c) | product | d) | reactant |
| 14. A _________ provides a pathway for static discharges to flow to or from eath | |
| a) | ground | b) | circuit | c) | short circuit | d) | switch |
| 15. A(n) ___________ is used to stop current flow through a circuit. | |
| a) | insulator | b) | conductor | c) | switch | d) | dry cell |
| 16. Energy must be ______ to break the bonds between atoms in molecules. | |
| a) | lost | b) | supplied | c) | equal | d) | decreased |
| 17. ________ are good conductors of electrons. | |
| a) | Insulators | b) | plastics | c) | glasses | d) | metals |
| 18. A solid that comes out of solution during a chemical reaction is a(n) ________-. | |
| a) | precipitate | b) | salt | c) | crude oil | d) | ion |
| 19. A ___ is thinner in the middle than at the edges. | |
| a) | plane mirror | b) | convex lens | c) | concave lens | d) | convex mirror |
| 20. Organic compounds that contain only carbon and hydrogen are ____________. | |
| a) | acids | b) | hydrocarbons | c) | bases | d) | salts |
| 21. A(n) ____________ separates white light into a band of colors by bending it. | |
| a) | echo | b) | prism | c) | sound wave | d) | mirror |
| 22. A compound containg carbon is called ___________. | |
| a) | inorganic | b) | organic | c) | endothermic | d) | exothermic |
| 23. A(n) ______ can occur when wires touch and connect the two sides of a circuit. | |
| a) | short circuit | b) | static discharge | c) | electric field | d) | current |
| 24. Hard water can be softened by adding organic compounds. | |
| a) | True | b) | False |
| 25. Soft water is better than hard water for ___________. | |
| a) | washing clothes | b) | steam irons | c) | water pipes | d) | all of these |