自製簡單的吸塵機（學生版）Making a simple vacuum cleaner (Student's version)
STEM連繫 6.1STEM connection 6.1自製簡單的吸塵機Making a simple vacuum cleaner
學習技能：Learning skill:
DIYDIY
難度﹕Difficulty:
★ ★
時間﹕Time:
1 節課1 lesson
物料Materials
步驟Procedures
1. 使用美工刀把膠瓶分開成兩半。
1. Use a cutter to cut the plastic bottle into half.
2. 在膠瓶的上半部剪一個小孔，並插入一個用紙巾製成的過濾袋。
2. Cut a small hole at the top of the bottle and attach a filter bag made of tissue paper.
3. 把棉線綁在乒乓球上，然後把棉線貼在瓶口。
3. Attach a thread to the ping-pong ball and tape the thread to the neck of the bottle.
4. 把膠瓶的下半部塞進上半部中。你已製成一個簡單的吸塵機！
4. Insert the bottom part of the bottle to the top part. A vacuum cleaner is done!
如何使用How to use
1. 把瓶口對準要清理的垃圾。
1. Aim at the rubbish you want to clean.
2. 把膠瓶的下半部向後拉。
2. Pull out the bottom part of the bottle.
3. 垃圾會被吸進瓶內！
3. The rubbish is sucked into the cleaner!
試想想Think about
1.
當你把膠瓶的下半部向後拉時，膠瓶內的氣壓有甚麼變化？
1.
When you pull out the bottom part of the bottle, how does the air pressure inside the bottle change?
2.
當你把膠瓶的下半部向前推時，膠瓶內的垃圾會怎樣？
2.
When you push in the bottom part of the bottle, what will happen to the rubbish?
3.
Hence, try to explain the working principle of the vacuum cleaner.