Lead in What can you think of when you see the title “Scientists at work ?” Some famous scientists in the world their discoveries or inventions The fields of science Something about each field------

Newton( ) He discovered why all things fall down to earth. Theory of Gravity

Charles Darwin ( ) Evolution

Po Ra Radioactivity Madam Curie ( )

Alexander Bell

Mendeleev ( ) Periodic Table of Elements

Einstein The Theory of Relativity

Questions for warming up 1.In a whole,what subjects are you learning in our school? 2.Among these subjects, what are the subjects in which you learn science? Physics ; Chemistry ; Biology

in a chemistry lab doing an experiment

chemistry What do you learn in the field of chemistry? chemical change physical change change gas liquid solid

in a physics lab doing an experiment ammeter

What do you learn in the field of physics? physics power electricity heat light gravity sound wave

in a biology lab looking at something through a microscope

biology What will you learn in the field of Biology? living things animal plant gene cell germ biology experiment

In a lab Listening 1 Mrs. zhu

Listen to the record. Tick the things that Mrs. Zhu talks about.  ( )safety in the lab  ( )experiments  ( )car accidents  ( )gloves  ( )long hair  ( )shoes  ( )gases  ( )liquids （液体）  ( )flames （火焰）

Before-experiment 1.First of all, don ’ t ________here without your teacher. Once you ’ re in here, follow____________________________. 2.When you came into the lab students with long hair should________, or put their hair under their clothes. 3.Always listen carefully to your teacher ’ s instructions and don ’ t touch anything, unless _______________________________. come in your teacher’s instructions tie it up your teacher tells you to

While- experiment 1.Never put your nose directly into a glass or over a bottle. Instead, you should ____________________________________and carefully smell it. 2.Never put your fingers into glasses and never taste anything! When working with fire, _____________________________. When working with electricity, make sure your hands are dry. 3._______________________________________. That can be dangerous. wave some air in your direction be careful about the flame Don’t throw things or start playing

After- experiment 1.Clear everything away and ________________________________. 2.Before leaving the classroom, ________________________________. 3.Don ’ t forget to __________________________. leave the classroom neat and clean wash your hands with water and soap turn off the lights and shut the windows

Speaking: New inventions and discoveries in modern times

Maglev train Maglev train is a vehicle that is suspended on the air above the railway and can run with high speed by the interactional force of electromagnetism.

Speaking Listen and read: Building a High-speed Maglev Train fast and clean / it has no wheels and no engine / it doesn't’ make any noise Advantages Disadvantages It’ a waste of money. It’s much too expensive.

Discuss the advantages and disadvantages of the followings in groups

1. Is cloning a good thing or a bad one? Advantages: *It can help some women have babies. *It can help medical research. Disadvantages: *It is not natural to make people. *Someone may use it to do strange things that may do harm to our human beings.

2. What does nuclear energy bring us? Advantages: *It makes enough electricity for us. *It’s a limitless reource. Disadvantages: *It may cause deadly environmental pollution. *It costs a lot of money to build /repair a power station.

3.What do you think of computers ? Advantages: *It makes communication cheaper, easier and faster. *It offers the most up-to-date information. Disadvantages: *It can be unsafe because of viruses. *It may cause lots of unfavorable problems. (over weight, eyesight decline, too much radiation, lack of rest……)

4.Are space flights worthwhile? Advantages: *It makes research of outer space possible. *It may take satellites into space. Disadvantages: *It’s very expensive and dangerous. *It may be used in a war.

Homework 1.Fully preview the reading part. 2. Read the new words