【提出问题】小明通过前面物理知识的学习，知道放大镜就是凸透镜．在活动课中，他用放大镜观察自己的手指（图甲），看到手指放大的像；然后再用它观察远处的房屋（图乙），看到房屋缩小的像．他想：凸透镜成像的大小可能与哪些因素有关？

【进行猜想】凸透镜成像的大小可能与物体距离凸透镜距离有关．

【设计并进行实验】

    Tom ____ up at 6:30 every morning and he ____ to school at 7:40. He ____ math at 8:30 and science at 9:30. English is his ____ subject. He ____ it because it's really ____. Mr. Green is his math teacher. He has ____ at 12:00 at school. His music and P.E. classes are often in the afternoon. They are ____. But he ____ not like history, because it's ____. He has seven classes on Monday, Tuesday and Thursday. He has six classes on Wednesday and Friday.