1. Scientists at work Unit 16

2. 1 He has very ________eyes; he catches sight of things quickly. 2 The car wouldn’t go because the __________had gone wrong. 3 Whether right or wrong, he has ideas about how the lessons should be _______________. 4 There are several other kinds of __________in the air besides oxygen. 5 The US and UK are __________by a common language and mutual interests. 6 Why did you___________the cloth when I’d advised you to cut it with scissors? 7 A live wire is one that is ____________with electricity. 8 The worker got _________when he touched the wire. 9 The rocket appeared about twelve to fifteen ________ in diameter. 10 The tea received a great________of praise from Tom. sharp engine conducted gases tied tear charged shocked feet feet deal Fill in the blanks with the words learnt in this unit.

3. A B table week door pea day sun house shoe head night pocket arm steam lazy break window photo son draw man light cloth bones end bell rising maker keeper ache club knife way chair shopping servant dreaming boat nut down break copying law tablecloth, weekend, doorbell, peanut, daybreak, sunrise,house-keeper, shoe-maker, headache, nightclub, pocket- knife, arm-chair, highway, steamboat, lazy- bones, breakdown, window-shopping, day- dreaming, photocopying, son-in-law Word formation:

4. in a chemistry lab doing an experiment

5. an English-Chinese dictionary, an English book and a notebook

6. in a physics lab doing an experiment

7. in a biology lab looking at something through a microscope

8. chemistry  science of elements and their laws of combination and change element substance gas, liquid, solid chemical change chemistry experiments

9. language  the system of sounds and words used by humans to express their thoughts and feelings sounds, words, phrases, sentences grammar communicate communication native/mother language foreign language

10. physics  science of matter and energy and of interactions between the two matter power energy physical change physics experiment

11. biology  science of life and of living organisms animal plant living things gene cell protein biology experiment

12. 1. Safety comes first 2. Follow the teacher’s instructions 3. Bottles may contain dangerous gases. 4. Immediately wash your eyes with a lot of water. 5. Clear everything away and leave the classroom neat and clean, wash your hands, turn off the lights and shut the windows. ( P22 )

13. Listening on page 89 1 It is the oldest public museum. it has a library where many great writers and scientists wrote their books. 2 A museum about nature and environment. 3The first areoplanes and the American Space capsule that made the first flight around the moon.

14. Useful expressions on P 23 be to do sth: should /must do, plan to do a maglev train in one’s opinion (a) waste of money much too / too much in the future mean to do sth./ mean doing sth. make (good/full) use of  The money would be better spent building more roads or railways in other parts of China.

15. Cloning 1.can help some women have babies 2.can help medical research 1.it is not natural to make people 2.dangerous, people use it to do strange things Nuclear energy 1.can make all the electricity we need 2.is a limitless resource 1.unsafe to all life if not controlled 2.can be expensive to build/repair Speaking on P23

16. Computers 1.makes communication faster 2.can keep information better 1.unsafe because of viruses 2.makes more problems than it solves Space flights 1.makes research of outer space possible 2.put communication satellites in space 1.expensive and dangerous 2.used by the army

17. Benjamin Franklin(1706~1790) an American printer, author, diplomat, philosopher, and scientist

19. Aim : Materials: Instructions: Description: Result: FRANKLIN’S FAMOUS KITE EXPERIMENT

20. Aim : Materials: Instructions: Description: Result: To show that lighting and electric are the same. some wooden sticks, a piece of silk, some rope, a sharp piece of metal, silk ribbon, a key, a condenser, a small shed, a thunderstorm with lightning Paragraphs 5 & 6 Paragraph 3 The electricity can be collected and stored in the condenser; can be used to do other experiments; proves that lightning and electricity are the same.

21. How to make a kite 1. Build the frame of the kite by making a small cross of two pieces of light wood. 2. Tie the corners of the handkerchief to the points of the cross. 3. Add a tail to the frame and tie a long string to the cross. What to do then  Fix a very sharp piece of metal, pointing a foot or more above the frame, to the top of the longer stick of the cross.  Fasten a key to the end of the long string.  Tie a silk ribbon to the string, just above the key. Tie to Add Fix Fasten

22. Useful phrases in the text a number of experiments do an experiment fly high in the rainy sky get /become charged a great deal of be made of / from fix / fasten / tie… to protect …from take care that…

23. Explanation of some sentences 1. Benjamin Franklin conducted a number of experiments in ______ he showed ______ electricity is. 2. Here is _____ he described one of his experiments. 3. Having realized ______ I could use a kite to attract lightening, I decided to do an experiment. ( )   When I had realized that I could use a kite ….   [ ] which what how that

24. ______ the first thunderstorm came, I took my condenser to a shed in the field ______ I could do my experiment. I was beginning to think ______ the experiment would not work. Others followed even before the whole string was wet, and I was able to collect and store a great deal of electricity in the condenser. The experiment proves that lightening and electricity are the same. When where that and [ ] ( )   [ ]  

25. Fly the kite ______ a thunderstorm appears to be coming on. Take care ______ the string does not touch the wall or the door. when [ ] that