2017-2018学年高中英语 Module 5 A Lesson in a Lab Reading 外研版必修1

7. Why did the teacher send the students out of the room? Because the liquid was acrylamide and the gas was poisonous.
8. What lesson did the incident teach the students and the teacher? Never to leave a bottle without a label in the chemistry lab.
Complete the passage with proper words according to Passage A and B. It is hard to think of a world without metals. Different metals have different uses, for example, iron can be used in _e_le_c_tr_i_c_a_l equipment. But above all we should know whether it will r_e_a_c_t under
2. What happens when you heat calcium in oxygen? It burns to form an oxide.
3. Which metals react with steam? Magnesium, aluminium and zinc.
4. Does iron have a slow or fast reaction with steam? It has a slow reaction.
4. What mistakes did Paul make? He used the wrong liquid.
5. Why did he make the mistake? Because there was no label on the bottle.
6. What happened when Paul heated the liquid? It formed a thick cloud of white gas.
Stage A (starting experiment)
cotton wool
water
water
Stage B (1 week later)
Stage C (Result)
nails
Iron does not rust
Iron does not rust
water Iron rusts
Read the passage again and complete the sentences.
The stone contains potassium.
sodium
calcium
magnesium
The wheel is made of aluminum.
zinc
oxide
Nails are easy to rust in the damp air.
Water boils at 100 °C.
On the other hand, if it is put together with water or _st_e_a_m_, there will be a _p_a_r_ti_a_l reaction. Next let’s do an _e_x_p_e_ri_m__e_n_t to support the above. First, get a test tube filled with water and put it over the _B_u_n_s_e_n_b__u_r_n_e_r to b__o_il for three minutes.
4. You add __s_o_m_e__o_il_ to the water because this keeps _a_i_r_ out of it.
5. It shows that _n_a_i_l does not rust in water that has no _a_i_r_ in it.
Read the passage again and answer the following questions:
1. Which of the metals in the table reacts the most with oxygen and water? Potassium, calcium and sodium.
different conditions. Otherwise it will keep the equipment from working well. As we all know, if iron is heated in oxygen, it will react slowly but will not form an _o_x_id_e_.
We can reach a conclusion that it is important for us build up a harmonious society.
It is a piece of electrical equipment.
1. In the first part of the experiment, the _a_ir_ is dry, not wet.
2. It shows that iron _d_o_e_s_n_o_t_r_u_s_t when the air is dry.
3. In the second part of the experiment, you must _b_o_i_l the water to make sure there is no __a_ir_ in it.
Then put three or four clean nails in the water with some oil added to it and leave the tube for one week. What happens? The iron does not _r_u_s_t in airfree water. Another experiment, if you put the nails in the tube with the air in it for one week, then what happens? Iron rusts in o_r_d_i_n_a_r_ywater.
3. A student was doing a chemistry experiment when he accidentally heated the wrong liquid and caused an incident in the laboratory.
Read the passage again and answer the questions:
Reading
Passage A
Read the passage as quickly as you can and choose the best title for it.
The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen
Reading on P93
Read about an incident during a chemistry lesson and choose the best summary.
1. A student didn’t follow the instructions carefully. He took the wrong liquid from the cupboard and nearly poisoned the class.
1. What substances were they using? Baking soda and hydrochloric acid.
2. What substances were the students making? Salt.
3. How can they make the reaction quicker? By making the mixture hotter.
2. 2.The chemistry teacher was demonstrating an experiment when she heated a poisonous liquid. There was so much smoke that the students had to leave the room.
5. Does copper react with water? No, it doesn’t.
Passage B
Read the passage and fill in the chart.
Iron in dry air
Iron in Iron in air-free ordinary water water