3. 1.Which of the metals in the table reacts the most with oxygen and water? 2.What happens when you heat calcium in oxygen? Potassium, calcium and sodium. It burns to form an oxide. Read again and answer the questions (P44) :

4. 3. Which metals react with steam? 4. Does iron have a slow or fast reaction with steam? 5. Does copper react with water? Magnesium, aluminium and zinc. It has a slow reaction. No, it doesn’t.

5. What apparatus can we see in a lab?

6. Can you name the following equipment ？ test tube tube holder tongs balance crucible beaker & glass rod bunsen burner

7. iron nails cotton wool balls Other vocabulary react vi. （化学）反应 reaction n. 反应 oxide n. 氧化物 steam n. 蒸汽， 水气

8. react vi. （化学）反应 reaction n. 反应 oxide n. 氧化物 steam n. 蒸汽， 水气

9. How to describe a scientific experiment: aim methodresult conclusion apparatus

10. Reading (Passage B) Read the passage and complete the table. cotton wool nails Iron does not rust. water Iron does not rust. water Iron rusts.

11. Passage B – Jigsaw reading One group reads one experiment report. Then fill in the form below. Aim Apparatus Method Iron in dry air: Iron in air-free water: Iron in ordinary water: Result Conclusion To find out if... iron nails test tubes oil tube holders iron nails test tubes oil tube holders cotton wool Bunsen burner cotton wool Bunsen burner After a week, rust ( not ) rust in

12. Describe the experiment to your partners: aim methodresult conclusion apparatus Iron in dry air: Iron in air-free water: Iron in ordinary water:

13. 1. You will hear a conversation in which a teacher helps a student do an experiment. Can you predict the result according to the aim? Aim: To find out if there is a change in weight when the metal magnesium burns in air. Result:___________ _ ________________ ________________ __________

14. Aim:Apparatus: 2. Listen again and complete the description of the scientific experiment: to find out if there’s a change in weight when magnesium burns in air magnesium, Bunsen burner, a balance, a crucible