(
课件网) How much do you know about general science Einstein What do you know about the things shown below Choose the correct answers to the quiz in Part 1. Then listen and check your answers. Water exists as a solid, a liquid and a gas. When you heat a metal, it expands. Steel is a mixture of iron and other substances. Two-thirds of the earth’s surface is water. The distance of the sun from the earth is 150,500,500 kilometers. The earth is 4.6 billion years old. The earth is forty-nine times larger than the moon. Answers: It’s interesting to do an experiment. But we’ve got a lot of things to do before an experiment. First, we should be clear about the aim of the experiment, the apparatus we need and how we can carry it out (we call it “method”). We watch what’s happening and get the result. Last it is important to have a discussion on the result of the experiment. Don’t forget to write down the conclusion. How to carry out an experiment successfully What is the correct order to describe a scientific experiment aim method result conclusion apparatus Do you know the following equipment/ apparatus related to science and experiment test tube tongs balance crucible beaker & glass rod Bunsen burner Potassium p1 p2 Sodium aluminium Calcium Magnesium Zinc Iron Copper Can you remember them Please match A with B. A Magnesium Iron Calcium Aluminium Copper Zinc Sodium Potassium B Al Zn Na K Fe Ca Mg Cu Passage A electrical adj. 用电的，与电有关的 electricity n.电 equipment n.设备，装备 react vi. （化学）反应 reaction n. 反应 oxide n.氧化物 steam n. 蒸汽， 水气 Reading and Vocabulary Read Passage A and choose the best title for it. The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen Which of the metals in the table react(s) the most with oxygen and water 2. What happens when you heat calcium in oxygen 3. Which metals react with steam 4. Does iron have a slow or fast reaction with steam 5. Does copper react with water Read again and answer the questions. Which of the metals in the table react(s) the most with oxygen and water What happens when you heat calcium in oxygen Potassium, calcium and sodium. It burns to form an oxide. Read again and answer the questions. 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. Qs: What should we know when we use metals Which metal reacts most with water, potassium or iron It is important to know how they react with different substances. Potassium reacts most with water. Passage B Q: What happens to nails in wet air Put the words in the right place of the experiment report. An Experiment Report 1. _____: 2. _____: 3. _____: (1) (2) (3) 4. _____: 5. _____: conclusion method result aim apparatus Aim Apparatus Method Result Conclusion Read the passage and finish the experiment report below. Aim ... ...
