瓶子“吸”鸡蛋！ 在家就能做的神奇实验
语篇类型: 科学实验
难度星级: ★★★★
建议用时: /9 min
参考答案: P29
YOU WILL NEED
√ an egg √ a towel √ some hot water
√ a glass bottle with a mouth slightly smaller than the egg（around 25～30 mm）
▷Boil the egg for about 4 minutes to achieve a hard-boiled white and a soft yolk. Let it cool. Then peel it.
▷Carefully pour hot water into the bottle. Swirl the hot water around inside the bottle.
▷When the glass is heated, pour out the water.
▷Put the egg on the opening of the warm bottle.
▷After a few minutes, the egg is pulled into the bottle.

HOW IT WORKS
The egg is pulled into the bottle because the hot water in the bottle makes the bottle warm, and the air in the bottle gets warm too. Hot air's volume gets bigger and takes up more space than cold air. When the bottle cools again, the air inside it goes back to room temperature, so the air pressure inside the bottle drops. And the outside air pressure pulls the egg into the bottle.
阅读短文，选择最佳选项。
()1. How many objects do you need in this experiment?
A. Two. B. Three. C. Four. D. Five.
()2. What will happen when the air inside the bottle goes back to the room temperature?
A. The air inside it becomes wetter. B. The air inside it becomes drier.
C. The air pressure inside the bottle becomes bigger.
D. The air pressure inside the bottle becomes smaller.
()3. 推理判断 Where is this passage probably from?
A. A notice board. B. A travel guide. C. A planting diary. D. A science magazine.
()4. 新考法 学科融合 When the egg is pulled into the bottle, which is the correct relationship between air pressure inside and outside the bottle?
A. P1＞P2 B. P1＜P2 C. P1＝P2 D. Not sure.

词汇积累 语法充电

1. C 细节理解题。根据“YOU WILL NEED”中的内容可知，实验需要鸡蛋、毛巾、热水和玻璃瓶四种物品。故选C。
2. D 细节理解题。根据“When the bottle cools again, the air inside it goes back to room temperature, so the air pressure inside the bottle drops.”可知，瓶子重新冷却后，瓶内气压降低。故选D。
3. D 推理判断题。本文介绍了一个科学实验的步骤和原理，最有可能来自科普类杂志。故选D。
4. B 推理判断题。根据原文最后一段(该实验的科学原理)可知，当鸡蛋被吸入瓶中，说明瓶外气压大于瓶内气压，因此P1＜P2。故选B。