(
课件网) Unit 3 The World of Science 第1课时 To discuss how some inventions have changed over the years and to predict how they will further change over the next 50 years. Look at the pictures and discuss how these objects have changed over the years. Recorder Telephone Computer Choose one of the objects in Activity 1 or an object that you use every day. Predict how it will further change over the next 50 years. Make notes about your ideas. My object: _____ How it will change: _____ Why it will change: _____ Present your ideas to the class. Use the notes in Activity 2 and the expressions in the box to help you . It will become… People will use … instead of … It will be … for people to … There will be no … because … Useful expressions After completing this unit, I can rate my performance 1 (excellent), 2 (good) or 3 (in need of improvement). □talk about careers in science □tell the story behind an invention □write an experiment report □think critically about what I’ve read and heard □cultivate a spirit of innovation I’ve learnt to make use of the following words and expressions: _____ I still need to improve: _____ Finish your presentation. Unit 3 The World of Science 第2课时 To read the instructions for the experiment To learn to analyse the structure of an experiment instruction To learn to write a report of the experiment Read the instructions for the experiment and answer the questions. Magic bottle Writing an experiment report Materials A boiled egg A glass bottle (bottleneck a bit smaller than the egg) Hot water Procedure Remove the shell of the egg. 2. Carefully pour some hot water into the bottle. the correct or usual way of doing sth. 步骤，程序 3. Shake the bottle gently. 4. Pour out the hot water. 5. Quickly put the egg on top of the bottle. Results Note: Do the experiment under the instructions of a teacher. 1. What do you think the results of this experiment will be 2. What can you learn from this experiment The egg will squeeze into the bottle. The experiment shows us the effects of air pressure. Air pressure indeed exists, and it is very powerful. Complete the boxes with the information in Activity 5. Do further research if necessary. Introduce the aim of the experiment. This experiment is designed to _____ Introduction show that air pressure indeed exists and it is very powerful. Describe the materials used in the experiment and explain the procedure. I prepared_____ to do this experiment. Procedure : _____ Main body a boiled egg, a bottle, some hot water First, remove the shell of the egg. Then, carefully pour some hot water into the bottle and shake the bottle gently. At last, pour out the water and put the egg on the top of the bottle. Report the results and what you have learnt. After the experiment, I can draw the conclusion that _____ _____. Conclusion Now write a report of the experiment. the air pressure exists, and it is the force of the air that pushed ... ...
