1.Which of the metals in the table reacts the most with oxygen and water? 2.What happens when you...

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) :

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.

What apparatus can we see in a lab?

Can you name the following equipment ？

test tube tube holder tongs balance

crucible beaker & glass rod bunsen burner

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

react vi. （化学）反应

reaction n. 反应

oxide n. 氧化物

steam n. 蒸汽， 水气

How to describe a scientific experiment:

aim

method result

conclusion

apparatus

Reading (Passage B)Read the passage and complete the table.

cottonwool

nails

Iron does not rust.

water

Iron doesnot rust.

water

water

Iron rusts.

Passage B – Jigsaw readingPassage B – Jigsaw reading One group reads one experiment report. One group reads one experiment report. Then fill in the form below.Then fill in the form below.

Aim Aim

ApparatusApparatus

MethodMethod Iron in dry air:Iron in dry air:

Iron in air-free water:Iron in air-free water:

Iron in ordinary water:Iron in ordinary water:

ResultResult

ConclusionConclusion

To find out if...To find out if...

iron nails test tubes oil tube holdersiron nails test tubes oil tube holders cotton wool Bunsen burnercotton wool Bunsen burner

After a week, rustAfter a week, rust

( not ) rust in( not ) rust in

Describe the experiment to your partners:

aim

method result

conclusion

apparatus

Iron in dry air:Iron in dry air:

Iron in air-free water:Iron in air-free water:

Iron in ordinary water:Iron in ordinary water:

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:____________ __________________________________________

Aim:Aim:

Apparatus:Apparatus:

2. Listen again and complete the description of the scientific experiment:

to find out if there’s a change in weight to find out if there’s a change in weight when magnesium burns in airwhen magnesium burns in air

magnesium, Bunsen burner, a balance, magnesium, Bunsen burner, a balance, a cruciblea crucible