冀教版九年级上册Unit 5 Look into Science Lesson 26课件(共15张PPT)

(共15张PPT)
Unit 5 Look into science
lesson 26 Keep the candle burning
Think about it
What is science
Do you like science Why or why not
Science is about physics, chemistry, biology,
geography, space and so on.
Doing experiments is interesting!
What are they doing
Learning aims
1. Aims of knowledge：
掌握单词和短语:match use up one-fifth be made up of
接触词汇:holder ,shallow, lighter ,examine, oxygen
2. Aims of abilities：
能用英语描述实验步骤，现象及结论。
掌握分数的表达方法。
3. Aims of emotion：
1）多动手、多动脑，积极参与活动。
2）激发学生对科学的兴趣。
a candle
a candle holder
a big glass jar
a shallow dish
matches
or a lighter
What do we need
What do we do
1. Put the candle in the candleholder.
2. Put the candleholder on the dish.
3. Fill the dish half full with water.
4. Light the candle.
5. Let the candle burn for two or three minutes.
6. Carefully put the jar over the candle until the top of the jar rests on the dish.
Predict and Observe
What will happen
The candle stops burning.
2. The water in the jar rises.
Discussion
1. Why does the candle stop burning
Because the oxygen in the jar is used up.
2. Why does the water rise about
one-fifth of the jar
Because about one fifth of the air is made up of oxygen.
Do you want to have a try
(As one describes the experiment ,the other one does it.)
Pair work
Try your best
一、1. Lily把瓶子装满了水。
Lily _____the bottle ______water.
2. 我妈妈昨天买衣服花光(用光）了她身上所有的钱。
My mother ___________her money to buy clothing yesterday.
3. 在我们班，三分之二的学生是男生，三分之一的学生是女生。
In our class,__________ students are boys,__________ students are girls.
filled
with
used up
two thirds
one third
4.天黑了，请用打火机点燃蜡烛。
It is getting dark. Please __________ the candle with the_________.
5.实验之后，广口瓶里没有氧气了。
There ______no oxygen in this jar after the____________.
二、1. It is said that ______students like to talk with friends online.
A. two-thirds B. two-three C. two-third D. thirds-two
light
lighter
is
experiment
A
2.Come on,baby.We have already done___of the work.
A. fifth two B. two fifth C.fifth second D. two fifths
3.About ___of the workers in this factory_____young pepole.
A. third fifths; is B. three fifths;are
C. three fives; is D. three fifth;are
D
B
Let’s do another interesting experiment
Challenge yourself!
带电的报纸
材料：1支铅笔；1张报纸。
步骤： 1. 展开报纸，把报纸平铺在墙上。
2. 用铅笔的侧面迅速地在报纸上摩擦几下后，会发生什么呢？
（ 电：Electricity 产生：produce 摩擦：rub）
Summary
Albert Einstein
Marie Curie
Science can change our life. I hope all of you can love science, and I hope some of you can become great scientists like Albert Einstein and Marie Curie.