2. Word File Sentence Patterns Expansion Writing Practice

3. I. electric & electrical electric 任何直接用電或產生電的東西 an electric light/generator electrical 有關電的人、工作或事物 an electrical engineer/store

4. II. useful expressions related to electricity electric power 電力 volt 伏特 an electric wire 電線 a fuse 保險絲 an electric shock 電擊 an electric outlet 電源插座 Back

5. Expansion I. Scientific Game II. Dictation

6. You will need: a paper towel a cork an empty bottle a half cup of vinegar a half cup of water a teaspoon of baking soda I. A Scientific Game

7. Step1. Pour the water and vinegar into the bottle.

8. Step 2. Put the baking soda into the middle of the paper towel. Roll up the towel and twist the ends so the baking soda will stay inside.

9. Step 3. Drop the paper towel and the baking soda into the bottle.

10. Step 4. Put the cork on as tightly as you can.

12. II. Dictation In June, ______, Benjamin Franklin proved that lightning was a type of ______ by flying a kite with a key tied to the bottom of the string ______ a thunderstorm. Before his ______, many people thought that lightning was a supernatural power, a display of anger from the _______. Check the answers.

13. II. Dictation In June, 1752, Benjamin Franklin proved that lightning was a type of electricity by flying a kite with a key tied to the bottom of the string during a thunderstorm. Before his experiment, many people thought that lightning was a supernatural power, a display of anger from the heavens.

14. Questions: 1. How did Benjamin Franklin prove that lightning was a type of electricity? 2. Before his experiment, what did people think about lightning? Back

16. A run-on sentence occurs when two or more complete sentences run together as one. Because it is not clear where one idea ends and another one begins, run-on sentences can confuse readers.

17. Examples: 1. The clothes cling together and crackle when peeled apart, you can see static electricity another way. □ a run-on sentence 

18. Examples: 2. The clothes cling together and crackle when peeled apart. You can see static electricity another way. □ a correct sentence 

19. Exercise: Look at the following sentences. Write “C” for a correct sentence or “R” for a run-on sentence. Then, revise the run-on sentences to form clear and complete sentences. 1. The term static electricity describes situations where things carry an electric charge. □ a correct sentence 

20. Exercise: 2. The balloon takes on a negative charge because it has extra electrons the balloon will then stick to the shirt or to another surface, such as a wall. □ a run-on sentence  Revise

21. 2. The balloon takes on a negative charge because it has extra electrons will then stick to the shirt or to another surface, such as a wall. BACK. The balloon

22. Exercise: 3. Similarly, when you walk across a carpet on a dry day, friction between your shoes and the carpet carries electrons from your shoes to the carpet, giving your body a positive charge. □ a correct sentence 

23. Exercise: 4. If you touch a doorknob, electrons may jump from the doorknob to your body you may see a spark and feel a slight shock. □ a run-on sentence  Revise

24. 4. If you touch a doorknob, electrons may jump from the doorknob to your body may see a spark and feel a slight shock. BACK. You

25. Exercise: 5. Lightning results from static electricity. Scientists believe that raindrops, moving about rapidly in the winds of thunderclouds, build up an electric charge. □ a correct sentence 

26. Exercise: 6. Parts of the cloud become positively charged, other parts become negatively charged. □ a run-on sentence  Revise

27. 6. Parts of the cloud become positively charged, BACK while other parts become negatively charged.

28. Remember, No Run-on Sentence can be allowed in the writing. You must remember to use a semicolon, a period, or a conjunction to make a sentence clear and correct.