Unit 5 Look into Science Lesson 25 Let’s do an experiment！ 课时练（第1-2课时含答案）

冀教版九年级全册Unit 5 Lesson25 同步练习
第1课时（附答案）
一、根据句意、首字母及汉语提示完成单词拼写
1. Tom wants to do an __________ (实验) to test his theory.
2. Surprisingly, some ________ (science) discoveries were made by accident.
3. If you find the ________(正确的) answer to the difficult physics problem, please show me.
4. I just learned a new ________ (方法) of cooking chicken. Would you like to try with me
5. The ________(力量)of love to Saihanba Forest Farm made Liu Jun and his wife stick there for more than 23 years.
二、用所给词的适当形式填空
1．Let's ____(pour) the water into the container.
2．Over the years I've come to the ____(conclude) that she's a very great musician.
3．The boy is ____(call)Jimmy. He is lovely.
4．Do you think that he could ____(possible) be right
5．Take your ____ (raincoat), children! It's raining outside.
三、根据句意及汉语提示完成句子
1．人类社会的进步不但取决于人们掌握的科学知识，还取决于他们的创新精神。
The development of human society depends on not only people's ____ ____but also their creative spirit.
2．为了查明原因，我把那个盒子倒了过来。
In order to find out the reason, I ____ the box ____ ____.
3．坐直，并且把你们的手从桌子上拿开。
Sit straight, and ____ your hands ____ the desk.
4．他发现空气的压强那么大。
He ____ that the air ____ is so strong.
5．你准备好给大家解释一下这个正确答案了吗？
____ you ____ to explain the ____ answer
四、阅读理解
Have you ever rubbed your hands together when they get cold Why do we do that We do that for friction．Friction happens when two things that aren't very smooth rub together to make heat energy.The faster you rub two things together，the more friction (and heat) you can make. Let's discover friction!
WHAT YOU'LL NEED：
●A piece of soap　●Water　●Your hands
WHAT TO DO：
1．Make sure your hands are dry.
2．Rub your hands together until you feel the heat of your hands.
3．Now，use a piece of soap and water to get your hands very slippery (滑的)．
4．Try to make friction happen while your hands are slippery.
5．Please write down what has happened.
LET'S TALK!
Friction is a kind of energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won't make much friction and your hands won't get so hot.
DID YOU KNOW
1．Friction happens when you stop your fast running bike.
2．Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn't know it.
__________
Friction is everywhere. Have you ever noticed situations where friction is happening If not, ask your parents to take you out in a car. If it is not too hot, touch the tires (轮胎) of the car before and after a short drive to see how much warmer they get from friction.
1．You'd better make your hands ________ to get heat when you rub them.
A．slippery B．dry C．wet D．smooth
2．What does the underlined word “friction” in this text mean in Chinese
A．摩擦 B．冷却 C．膨胀 D．震动
3．________ is NOT an example of friction.
A．Bike riding B．Car driving C．Hands rubbing D．Friction discovering
4．What's the last column (栏目)
A．THINK IT OVER! B．WHAT HAPPENED
C．EVERYDAY ACTION： D．WORK WITH PARENTS!
5．This text is most probably ________.
A．a science report B．a car advertisement
C．a rubbing introduction D．a chemistry programme
冀教版九年级全册Unit 5 Lesson25 同步练习
第2课时（附答案）
一、单项选择
( )1. I’m sure _______ Jim plays basketball well.
A. of B. to C. with D. that
( )2. It must have rained last night, because the ground _______.
A. gets wet B. gets wetly C. gets dry D. gets dryly
( )3. After a 3-week winter vacation, students usually _______ some weight when they return to school.
A. put away B. put up C. put in D. put on
( )4. Please cover the table _______ this cloth.
A. in B. for C. with D. at
二、用括号内所给单词的适当形式填空
1. He carefully _________ (pour) the milk into the glass.
2. Tom is strong enough ___________ (hold) the heavy box.
3. The boss _____________ (force) the workers to work over 9 hours a day.
4. We have ________________ (discover) that light moves faster than sound.
5. From this story，Jenny ____________ (conclude) that nothing is impossible if you put your heart into it.
三、连词成句
1. keeps, in, what, sky, the, the, birds
________________________________________
2. cup, paper, please, cover, your, with
________________________________________.
3. I’m, get, won’t, sure, floor, I, the, wet
________________________________________.
4. is, cardboard, water, holding, a, the, inside
________________________________________.
5. you, could, pour, a cup of tea, out, for, me
_________________________________________
能力训练
四、选择填空
1. He worked as a guide at the ____ Museum.
A. Science B. Scientific C. Scientist D. Scientifically
2. I like physics best, because I can do a lot of ____.
A. exhibitions B. experiments C. energy D. environment
3. As his key was lost, he had to _____ his door open.
A. move B. force C. push D. pull
4. —What a creative idea it is!
—Yes, the top of the house is a boat _____ upside down.
A. turned B. to turn C. turning D. turns
5. Be careful when you cross this very busy street. If not, you may _____ run over by a car.
A. have B. get C. become D. turn
6. A 32-year-old delivery driver _____ Gao Zhixiao was still working as the virus spread across China.
A. called B. is called C. calls D. was called
7. You should _____ your shoes before you enter the dancing room.
A. get off B. put off C. take off D. fall off
8. —It’s cold outside, Jimmy! You should ____ your sweater.
—Thanks, mom.
A. take off B. take in C. put on D. put up
9. More dinosaur fossils (化石), including footprints, bones or eggs, could _____ in the future.
A. discover B. be discovered C. have discovered D. be discovering
五、用方框中所给单词或短语的适当形式填空
be sure of，get wet，turn over，take...off，fill...with
1. Remember to take an umbrella，or you will ________．
2. Can you help me _________ the bottle ________ the apple juice
3. Please _________ your coat _________ and hang it on the wall.
4. She ______________ the tape，and saw a beautiful picture on the other side.
5. She ____________ passing the exam，because she has prepared for it for more than a month.
素养提升
六、根据短文内容和词语提示补全短文
Miss White was a teacher at a school for boys and girls. She 1.t________ them chemistry and physics from the 2.l________ to the highest classes in the school. Sometimes the new classes learned quickly, but sometimes they were very slow and then Miss White had to 3. r ________ things many times.
Once, the first class had been studying chemistry for several 4.w________ when Miss White 5.s ________ asked,“What is water Who knows Hands up ”
There was silence for a few 6.s ________, and Miss White felt sad, but then one boy 7.r ________ his hand.
“Yes, Danny!”said Miss White happily. He was not one of the 8.b ________ in the class, so she was glad that he could 9.a________answer.
“Water is liquid which has no colour until you wash your hands in it. Then it 10.t________ black.”The boy answered.
七、阅读理解
Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!
Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.
"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."
British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.
Will there be a better indicator than litmus paper The three kids decided to try and find out!
How They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.
The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!
"It's our first scientific journey, Huang said, "But it makes me want to try harder."
1. Whom did the three kids want to challenge
A．Their chemistry teacher. B．Their headmaster.
C．Robert Boyle D．Thomas Edison
2. What did the three kids found
A．a red cabbage B．a red carrot
C．a red onion D．a red stem
3. From the text, a red cabbage is a kind of ____.
A．plant B．animal C．paper D．liquid
4. What is widely used as the acid-base indicator now
A．red cabbage B．litmus paper
C．any plant D．any flower
5 The story mainly tells us ____.
A．how to make litmus paper B．about the three kids' spirit
C．scientists were wrong D．the kids are heroes
冀教版九年级全册Unit 5 Lesson25 同步练习
第1课时（附答案）
一、1.experiment 2.scientific 3.correct 4.method 5.force
二、1.pour　2.conclusion　3.called　4.possibly 5．raincoats
三、1.scientific knowledge　2.turned; upside down 3．take; off 　
4.discovered/found; pressure 5．Are; ready; correct
四、BADCA
冀教版九年级全册Unit 5 Lesson25 同步练习
第2课时（附答案）
一、DADC
二、1.poured 2.to hold 3.forced/forces 4.discovered 5.concludes
三、1. What keeps the birds in the sky
2.Please cover your cup with paper
3.I'm sure I won't get the floor wet
4.A cardboard is holding the water inside
5.Could you pour out a cup of tea for me
四、1.A 2.B 3.B 4.A 5.B 6. A 7.C 8.C 9.B
五、1.get wet 2.with, fill 3.take, off 4.turned over 5.is sure of
六、1.taught 2.lowest 3.repeat 4.weeks 5.suddenly 6.seconds 7.raised 8.boys 9. rightest 10. turns
七、1-5 CAABB