Lesson 26 Keep the Candle Burning教案及板书设计

Unit 5

Look into Science Lesson 26

Keep the Candle Burning

No. 7 Middle School

Li Haijing

Teaching Aims：

This unit presents several easy and fascinating science experiments.

We should have Ss to pay attention to science and excite the interest to study it , foster Ss’

the spirit and attitude to the science.

Learning objectives：

1. To understand the experiment 2. To learn to do the experiment by yourself 3. To learn some useful words and expressions

Words:

match; holder; shallow; lighter; examine; oxygen Phrases:

use up; be made up of；one fifth Teaching importance：The words and the expressions Teaching difficulties: one fifth Teaching tools: The real objects, the PPT. Teaching steps: I.

Lead-in. 1.

Show a picture with a candle, and ask Ss.

The teacher asks: Do you know Einstein, he is a scientist. Scientists like to do experiments. So today let’s learn about an experiment, it’s “Keep the candle burning”. Now look at a picture. -- What’s this?

--It is a candle. --What’s it for?--It's for burning, and burning needs oxygen.(Show the phonetic of “oxygen” and teach the pronunciation. 2. Show an object and say: It is a ..., Look. What’s it made of? What’s it used for? What’s it like？Then show the PPT, get Ss to read, make sure they can understand them. Expand some words. 1) A jar---It’s not big, it’s made of glass. It can hold something in it .

2) A dish---It's round, it is used to fill with things, but not too much, because it is shallow.

That river is shallow, the little horse can walk past it. 3)

A candle holder--- It is used to hold a candle, it looks like a little cup. It’s made of metal. 4)

A match--The first picture is about one match in it, the second picture has

three matches in it, so teach “a match” and “some matches”.

A lighter---It is used to light something. Today I must use them to light a candle.

They are both used for burning, so we call them lighters. 3.With the real objects, get the Ss to learn the new words again.

Then with the PPT and record, get Ss to read and try to remember the words.: match; holder; shallow; lighter; examine; oxygen II.

1. The experiment is interesting, now look at a video,watch carefully, What happens to the candle?

(It stops burning.) 2.The teacher does it twice, slowly say out the steps, make sure Ss can understand it, and show the key words on the Bb. 1) Put ... in ...;

2) Put ... on ....; 3) Fill ...with...;

4) Light...;

5) Let ... burn...;

6) Put... over... until... rests on ...;

7) Examine... in...Let's do and think 3. T asks Ss “Are you interested in doing it?” Then get Ss to practice the experiment in groups and ask two groups to show. Get Ss to watch and answer : Why does the candle stops burning? Because it has used up all the oxygen in the jar, there is no oxygen in it. use up---He has used up all his energy. 4. Ask Ss. What can you see? (The candle stops burning, and the water rises.) Get Ss read and try to find out: What is happening? Why does the water rise? Because about one fifth of the air is made up of the oxygen. The water rises

and fills about on fifth of the jar.

be made up of---The earth is made up of seven continents and four oceans. (Write the key words on the Bb) III.

Finish the experiment

IV. Blackboard design. Lesson 26

Keep the Candle Burning

What do we need?

A candle

A holder A jar

Some water

Matches/ a lighter

V. Homework

Do the experiment with English description, and upload to the teacher. What can we see? stops burning has used up ... in ... rise one fifth of ... is made up of rises and fills about

How to do the experiment? Put ... in ...

Put ... on .... Fill ...with... Light... Let ... burn... Put ... over... until... rests on ... Examine... in...

report in groups.