课件16张PPT。1★To know some words and expressions about science and experiments
★To learn how to write an experiment report
★ To build up the love for science
Learning Aims: 1Do you know them?potassiumsodiumcalciummagnesiumaluminiumzincironcopperRead the passage and choose the best title for it . The Different Uses of Metals
The Reaction of Metals
The Reaction of Metals with Oxygen Passage AAnswer the following questions according to the information given in the table:1. Which of the metals in the table reacts the most with oxygen and water?
potassium, calcium and sodium
2. What happens when you heat calcium in oxygen ?
It begins to form an oxide.3. Which metals react with steam ?
Magnesium, aluminium and zinc
4. Does iron have a slow or fast reaction with steam?
It has a slow reaction. Passage BA Simple Scientific ExperimentA Simple Scientific ExperimentLook at the pictures. Do you know the names of the equipment?tongstest tube holdertest tube balanceBunsen burner beaker tweezerscrucible 1.We use a ________________to heat things when doing an experiment.
2.We put things into a glass __________________to mix them, or to heat them, or to keep them.
3. A ______ is used to weigh the things we use in an experiment.
4. _______________are needed to pick up things which are too hot or dangerous to pick up with
our hands.Bunsen burnertest tube/beakerbalanceTongs/TweezersUsage of the equipmentcotton
wooliron nailsNails don’t rust in dry airair-free waterNails don’t rust in air-free waterordinary
water
waterNails rust in ordinary water Stage D
(Conclusion) Iron doesn’t rust in dry airIron doesn’t rust in air-free waterIron rusts in ordinary waterSum upHow to do a scientific experiment successfully?
First, we need to have an ____ and prepare the necessary_________ for the experiment.
Then, we must choose correct________ and observe carefully.
After that we can reach a________ according
to the______ of the experiment . aimapparatusmethodsresultconclusion1TaskObserve the reaction of sodium in cold water and then write an experiment report to find out if sodium reacts with water.
filter paper, sodium, cold water, a pair of
tweezers, a beaker, a knife, a piece of glass, (1)Half-fill the beaker with cold water.
(2)Take a piece of sodium out of the oil.
(3)Dry the sodium with the paper.
(4)Cut off a small piece of sodium
(5)Put the small piece of sodium into the water.
The sodium moves around on the water, giving off smoke and disappears at last. Sodium reacts with cold water.An Experiment Report1Group Work Show your opinions:
1.Scientific experiments are___
because_____________
2.Science is____ because_____
3.It takes/needs ________to be a scientist.
Homework Review what we have learned during this period
Finish the experiment report in the newspaper (B4)