Module 5 A lesson in lab Reading 课件 (共30张PPT)

课件30张PPT。外研版
高一年级 (必修1)
Module 5Reading What can you see in these pictures?B. aimD. methodA. resultC. conclusionCThe steps of a scientific experimentRead 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 Passage AIt is a piece of electrical equipment. The stone contains potassium sodiumcalcium magnesium The wheel is made of aluminum. zinc oxide Nails are easy to rust in the damp air. Water boils at 100 °C. 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.
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.
5. Does copper react with water?
No, it doesn’t.Read the passage and fill in the chart. cotton
woolwater water Passage B
Complete the passage with proper words according to passage A.
Metals are very important, so when using them we should know how they _____ with different substances. Take iron used in ________ equipment for example, when ______ in oxygen, it will react slowly. When it is put together with water or _____, there will be a partial _______. reaction reactelectricalheated steamRead the passage and fill in the chart. Passage Bcotton
woolwater water 1. In the first part of the experiment, the ___ is dry, not wet.
2. It shows that iron ___________ when the air is dry.
3. In the second part of the experiment, you must ____ the water to make sure there is no ____ in it.airdoes not rustboilairRead the passage again and complete the sentences.4. You add _________ to the water because this keeps ____ out of it.
5. It shows that ____ does not rust in water that has no ____ in it.some oilairnail airComplete 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 ________ equipment. But above all we should know whether it will ____ under electricalreactdifferent 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 _____. oxideOn the other hand, if it is put together with water or _____, there will be a ______ reaction. Next let’s do an __________ to support the above. First, get a test tube filled with water and put it over the _____________ to ___ for three minutes. steampartialexperimentBunsen burnerboilThen 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 ____ in air-free 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 _______ water. rustordinary1. When we use metals, it is important to know how they react with different substances, for example, water and oxygen.
= When we use metals, we should know how metals react with different substances, for example, water and oxygen, which is very important. Difficult sentences2. Here is a table with the metals that react most at the top, and the metals that react least at the bottom.
= A table is here. At the top of the table we can see the metals that react most and at the bottom of the table we can see metals that react least.Learn the new words by heart.
Read Passage A and B and try to retell it.Homework