Module5 A Lesson in a Lab 课件（外研版必修1）.pptVIP

It’s a good place to study , It’s a great place to explore , It’s a wonderful place to discover new things ! An Experiment Report 1. __________: 2. __________: 3. __________: (1) (2) (3) 4. __________: 5. __________: Complete the sentences using what we learnt. In the first part of the experiment, the ____ is dry. It shows that iron ___________ in dry air. In the second part, you must _____ the water to _____ ____ that there is no air in it. ________ some oil to the water can ______ the air out of it. It shows that ______ don’t rust in _______ water. In the third part, _______ the tube with water. It shows that they rust in _________ water. * * * * * * * * Welcome ! lab They are doing scientific experiments. MODULE 5 A Lesson in a Lab Reading and Vocabulary Passage B A Simple Scientific Experiment B B.aim D.method A.result C.conclusion D A C The stages of a scientific experiment clean iron nails test tubes test tube holder cotton wool oil Bunsen burner Apparatus 1. What is the use of the cotton wool in the test tube? 2. Why must we boil the water? 3. What is the use of the oil? The cotton wool can keep air dry. This makes sure there is no air in the water. The oil can keep air out of water. Aim Apparatus Method Result Conclusion Iron in dry air Method (1) Put some iron nails at the bottom of a test tube. (2) Push some cotton wool down the tube. (3) Leave the tube for one week. Aim To find out if iron rusts in dry air. Apparatus clean iron nails, a test tube, test tube holder, cotton wool Result After one week, the nails have not rusted. Conclusion Iron does not rust in dry air. Iron in the dry air Result The nails do not rust in the tube with air-free water. Conclusion Iron does not rust in the air-free water. Iron in air-free water Aim To find out if iron rusts in water that has no air in it (air-free water). Apparatus clean iron nails, a test tube, test tube holder, Bunsen burner, oil Method Iron in ordinary water (1) Half-fill a test tube with wa