Unit 6 Looking into Science课时5 Keep the candle burning! 课时练习 2026-2027学年冀教版九年级英语上册

**基本信息** 练习围绕“蜡烛燃烧”实验主题，分层设计从基础词汇到语篇综合，强化语言能力与科学探究思维的结合，适配新授课知识巩固需求。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础层|核心词汇（单词、词组）|直接考查默写，强化记忆，夯实语言能力基础| |进阶层|句型结构与语法应用（完成句子、词形填空、语法填空、翻译）|结合实验情境，训练语法转换与句子构建，提升学习能力| |综合层|语篇理解与综合应用（阅读理解、完形填空、阅读还原）|通过实验相关语篇，提升信息提取与逻辑分析能力，体现思维品质|

2026-2027学年冀教版九年级上 Unit 6 Looking into Science课时5 Keep the candle burning! 课时练习 一、单词默写（根据汉语提示写出对应的英文单词，每题1分，共15分） 1. 蜡烛（n.）__________ 2. 盘子；碟子（n.）__________ 3. 燃烧（v.）__________ 4. 氧气（n.）__________ 5. 上升；升起（v.）__________ 6. 浅的（adj.）__________ 7. 打火机（n.）__________ 8. 火柴（n.）__________ 9. 实验（n.）__________ 10. 结果；后果（n.）__________ 11. 挑战性的（adj.）__________ 12. 特定的；具体的（adj.）__________ 13. 观察；评论（v.）__________ 14. 决定；决心（v.）__________ 15. 安全的（adj.）__________ 二、词组默写（根据汉语提示写出对应的英文短语，每题1分，共8分） 1. 蜡烛座；烛台 __________ 2. 把……倒过来 __________ 3. 用光；耗尽 __________ 4. 由……组成 __________ 5. 装满一半 __________ 6. 停止燃烧 __________ 7. 搜索；寻找 __________ 8. 决定做某事 __________ 三、完成句子（根据汉语提示完成英文句子，每空词数不限，每题2分，共20分） 1. 把蜡烛放在蜡烛座上。 ______ the candle ______ the candle holder. 2. 把蜡烛座放在盘子上。 Put the candle holder ______ the ______. 3. 在盘子里装一半水。 ______ the dish ______ ______ with water. 4. 小心地把罐子倒扣在蜡烛上。 ______ put the jar ______ ______ over the candle. 5. 检查罐子里的水。 ______ the water ______ the jar. 6. 罐子里的水上升了，填满了大约五分之一的罐子。 The water ______ the jar ______ and fills about one ______ of the jar. 7. 蜡烛燃烧时，它消耗空气中的氧气。 As the candle ______, it ______ the oxygen in the air. 8. 当蜡烛停止燃烧时，它已经用光了空气中的氧气。 When the candle ______ burning, it has ______ up all the oxygen in the air. 9. 空气中大约五分之一是由氧气组成的。 About one fifth of the air ______ ______ ______ of oxygen. 10. 水上升并填满了罐子的大约五分之一。 The water ______ and fills about one fifth of the jar. 四、用括号内所给词的适当形式填空（每题1分，共10分） 1. The candle stopped ______ (burn) when the oxygen was used up. 2. Fill the dish half full with water ______ (careful). 3. The water inside the jar ______ (rise) and fills about one fifth of the jar. 4. About one fifth of the air is made up of ______ (oxygen). 5. This experiment is one of the ______ (easy) ones I have ever done. 6. After the experiment, the third student makes ______ (observe) on what has happened. 7. The students were ______ (excite) about the results of the experiment. 8. Please write down the ______ (specific) steps of the experiment. 9. We decided on an experiment that is ______ (interest) and safe. 10. The candle has used up all the oxygen in the ______ (air). 五、阅读短文，在空白处填入一个适当的词或用括号内所给词的正确形式填空（每题1分，共10分） Last week, our science teacher 1. ______ (ask) us to do a simple experiment at home. We needed a candle, a holder, a jar, 2. ______ dish, some water, and a lighter. First, I put the candle in the holder and placed 3. ______ on the dish. Then I filled the dish half full with water. After 4. ______ (light) the candle, I carefully put the jar upside down over the candle 5. ______ the top of the jar rested on the dish. I watched 6. ______ (close) as the candle burned. After a few seconds, the candle stopped 7. ______ (burn). At the same time, the water inside the jar started to rise. It filled about one 8. ______ (five) of the jar. I 9. ______ (conclude) that the candle had used up the oxygen in the jar. Since about one fifth of the air is oxygen, the water rose to take its 10. ______ (place). It was an amazing experiment! 六、将下列句子翻译成英文（每题2分，共10分） 1. 蜡烛燃烧时消耗空气中的氧气。   2. 罐子里的水上升了，填满了大约五分之一的罐子。   3. 当蜡烛停止燃烧时，它已经用光了空气中的氧气。   4. 空气中大约五分之一是由氧气组成的。   5. 把罐子倒扣在蜡烛上，直到罐口接触到盘子。   七、阅读理解（阅读短文，从每题所给的A、B、C、D四个选项中选出最佳选项，每题2分，共20分） A Why Does a Candle Need Air? Have you ever wondered why a candle goes out when you cover it with a jar? The answer lies in the science of combustion. Combustion is the scientific term for burning. For a candle to burn, it needs three things: fuel (the candle wax), heat (from the flame), and oxygen (from the air). When you cover a burning candle with a glass jar, you are cutting off the supply of oxygen. The candle continues to burn for a short time, using up the oxygen inside the jar. Once all the oxygen is gone, the candle has no choice but to stop burning. This is why the flame goes out. But there is more to this experiment than just the candle going out. If you place the jar in a dish of water before covering the candle, you will see something amazing. As the candle burns and uses up the oxygen, the water from the dish rises into the jar. It rises to fill the space that was once occupied by the oxygen. This shows that oxygen makes up about one fifth of the air we breathe. This simple experiment teaches us an important lesson: fire needs oxygen to burn. Without oxygen, there is no fire. This is why firefighters often use special chemicals that can remove oxygen from a fire to put it out. ( )1. What does the word "combustion" mean in the passage? A. 燃烧 B. 蒸发 C. 冷却 D. 融化 ( )2. What three things does a candle need to burn? A. Water, heat, and oxygen. B. Fuel, heat, and oxygen. C. Fuel, air, and light. D. Heat, light, and fuel. ( )3. Why does the candle stop burning when covered with a jar? A. The jar cools the candle down. B. The candle runs out of fuel. C. The oxygen inside the jar is used up. D. The water puts out the flame. ( )4. Why does water rise into the jar during the experiment? A. The water is attracted to the heat. B. The water fills the space left by the used oxygen. C. The water is pushed up by air pressure. D. The candle pulls the water up. ( )5. What can we learn from this passage? A. Fire can burn without oxygen. B. Oxygen is not important for burning. C. Fire needs oxygen to burn. D. Water can stop any fire. B A Science Fair Project For last year's school science fair, I decided to do the candle and jar experiment. I chose it because it was simple, safe, and had a clear explanation. I wanted to show my classmates how air pressure and oxygen work together. I prepared all the materials at home. I used a small candle, a glass jar, a plate, and some water. I also prepared a poster to explain the science behind the experiment. On the day of the fair, I demonstrated the experiment to visitors. I first lit the candle, then covered it with the jar. The flame went out after a few seconds, and the water rose inside the jar. Everyone was amazed! I explained that the candle uses up the oxygen, and the water rises to fill the empty space. I also showed them that about one fifth of the air is oxygen. Many visitors said they had never thought about air having "space" before. Some teachers even said it was one of the best experiments at the fair. This experience taught me that even a simple experiment can teach us a lot about the world. It also showed me that science can be both fun and educational. ( )6. Why did the writer choose this experiment for the science fair? A. It was the most difficult one. B. It was simple, safe, and had a clear explanation. C. It was the cheapest one. D. It was the most expensive one. ( )7. What did the writer prepare for the science fair besides the experiment materials? A. A video. B. A poster. C. A model. D. A book. ( )8. What happened when the writer covered the candle with the jar? A. The candle burned brighter. B. The flame went out and water rose inside the jar. C. The jar broke. D. Nothing happened. ( )9. How did the visitors react to the experiment? A. They were bored. B. They were angry. C. They were amazed. D. They didn't pay attention. ( )10. What lesson did the writer learn from this experience? A. Simple experiments are not worth doing. B. Science fairs are a waste of time. C. Even a simple experiment can teach us a lot. D. Only difficult experiments are educational. 八、完形填空（阅读短文，从每题所给的A、B、C、D四个选项中选出最佳选项，每题1分，共10分） I remember my first science experiment very well. It was in Grade 5, and our teacher 1. ______ us to do a simple experiment with a candle and a jar. I was very 2. ______ because I had never done any experiments before. First, I put the candle in the holder. Then I placed it on a dish and 3. ______ the dish half full with water. After that, I lit the candle. 4. ______ I covered the candle with a glass jar. The flame went out after a few seconds, and I saw the water 5. ______ inside the jar. I was so 6. ______! My teacher explained that the candle had 7. ______ all the oxygen in the jar. Since about one fifth of the air is 8. ______, the water rose to fill that space. I learned that fire needs oxygen to burn. That experiment 9. ______ my interest in science. Since then, I have done many more experiments. I have learned that science is not just about books—it is about 10. ______ and discovery. ( )1. A. asked B. ordered C. warned D. invited ( )2. A. tired B. bored C. excited D. angry ( )3. A. filled B. emptied C. cleaned D. washed ( )4. A. Before B. After C. Then D. While ( )5. A. drop B. rise C. flow D. move ( )6. A. scared B. surprised C. sad D. tired ( )7. A. made up B. put up C. used up D. given up ( )8. A. oxygen B. nitrogen C. carbon dioxide D. hydrogen ( )9. A. ended B. changed C. started D. finished ( )10. A. reading B. writing C. exploration D. memory 九、阅读还原（阅读短文，从方框中选出能填入空白处的最佳选项，其中有两项多余，每题2分，共10分） A. If you are a teacher, you can do this experiment with your class. B. First, make sure you have all the materials ready. C. The water rises because the candle uses up the oxygen. D. It shows that oxygen makes up about one fifth of the air. E. However, the experiment will not work without a glass jar. F. That is why the water rises to take the place of the oxygen. G. You can also try this experiment with different sized jars to see if the result changes. The candle and jar experiment is a classic science demonstration. It is easy to do and teaches a valuable lesson about oxygen and air pressure. 1. ______ Start by placing a candle in a holder on a shallow dish. Add some water to the dish. Light the candle, then cover it with a glass jar. Watch carefully as the flame goes out and the water rises. 2. ______ Why does the water rise? As the candle burns, it consumes the oxygen inside the jar. When the oxygen is gone, the candle stops burning. The space left by the oxygen is then filled by the water. 3. ______ This experiment has an important scientific meaning. 4. ______ This is a fact that can be measured and proven. 5. ______ You will find that larger jars take longer for the flame to go out because they contain more oxygen. 参考答案 一、单词默写 1. candle 2. dish 3. burn 4. oxygen 5. rise 6. shallow 7. lighter 8. match 9. experiment 10. result 11. challenging 12. specific 13. observe 14. decide 15. safe 二、词组默写 1. candle holder 2. turn upside down 3. use up 4. be made up of 5. fill half full with 6. stop burning 7. search for 8. decide to do 三、完成句子 1. Put; in 2. on; dish 3. Fill; half full 4. Carefully; upside down 5. Examine; in 6. inside; rises; fifth 7. burns; uses 8. stops; used 9. is made up 10. rises 四、词形填空 1. burning 2. carefully 3. rises 4. oxygen 5. easiest 6. observations 7. excited 8. specific 9. interesting 10. air 五、语法填空 1. asked 2. a 3. it 4. lighting 5. until / before 6. closely 7. burning 8. fifth 9. concluded 10. place 六、句子翻译 1. When a candle burns, it uses the oxygen in the air. 2. The water inside the jar rises and fills about one fifth of the jar. 3. When the candle stops burning, it has used up all the oxygen in the air. 4. About one fifth of the air is made up of oxygen. 5. Put the jar upside down over the candle until the top of the jar rests on the dish. 七、阅读理解 1. A 2. B 3. C 4. B 5. C 6. B 7. B 8. B 9. C 10. C 八、完形填空 1. A 2. C 3. A 4. C 5. B 6. B 7. C 8. A 9. C 10. C 九、阅读还原 1. A 2. C 3. F 4. D 5. G 学科网（北京）股份有限公司 $