题型:阅读选择 题类: 难易度:普通
浙江省杭州十三中2023-2024学年九年级下学期英语3月考试试卷
A Chemical reactions(化学反应)make for some great experiments.You can make use of the CO2 (carbon dioxide) given of by a baking soda and lemon Juice reaction to blow up your balloon!
What you'll need:
★Balloon
★About 40 ml of water (a cup is about 250 ml so you don't need much)
★Soft drink bottle ★Juice from a lemon
★1 teaspoon of baking soda Instructions:
★Before you begin, make sure that you pull the balloon long to make it as easy as possible to blow up.
★Put the 40 ml of water into the soft drink bottle.
★Add the baking soda and mix it with water.
★Put the lemon juice in and quickly put the balloon over the mouth of the bottle.
What's happening?
If all goes well, then your balloon should inflate(膨胀)! Adding the lemon juice to the baking soda creates a chemical reaction and produces CO2. The gas rises up and escapes through the soft drink bottle. It doesn't, however, escape the balloon, pushing it outwards and blowing it up.
Book Club ____ Charlotte's Web Don't miss one of America's top 100 most- loved novels. It is a moving story about the friendship between Wilbur the pig and Charlotte the spider About the story A little girl Fem has a little pig named Wilbur. Charlotte is Wilbur's dear friend, a beautiful large grey spider who lives with Wilbur on the fam. Wilbur the pig is hopeless when he discovers that he will be the farmer's Christmas dinner until his spider friend, Charlotte decides to help him. By a wonderfully clever plan. Charlotte saves the life of Wilbur. About the writer E. B. White loved animals and farm life. Wilbur the pig was inspired(赋予灵感) by a poor pig that he failed to save. At that time, many animals on the farm were killed, and this led to the topic of this book: saving a pig. | Win a Free Copy Join us and win a tree copy. How to join us? ● Fill in at an entry form bookclub.com/ novels-18 before March 28 at 11:59 pm. OR ●Fill in the form in our club before March 28 at 18:00 pm. |
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