7.The teacher to student activities as detailed in the activities 2 tested for the ability to clean the ของเครื่องสำอาง type cleaning. By observing the grease stains affixed to the container after washing cosmetics.Such as to decide how best to get rid of the fat or clean your best to do activities
.8.I start to give students an idea, question If you want to know what kind of cosmetics cleaning better. How to check?With the cosmetics cleaning a new type of recently published through advertising on television. The students will help plan check do. The design of how to determine the ability to purify of cosmetics cleaning interest group
.9.The plan and design experiment check. The teacher used to introduce students to predict question or hypothesis, such as when the solution was added into the soap mixture will make oil and water together identify the substances used in the experiment. Such asThe dirt skin, identify the parameters of the experiment, such as the independent variable or variables, including soap solution variables, including separation of oil and water. Control variables, including water content, oil content, number of times in one substance.Experiment of using water mixed with oil. Laboratory experiment using water mixed with oil and soap solution To observe and identify what and how to save the results before the experiment. The teacher should discuss the review how to use tools, experimental equipmentSuch as the separation of the tube and a glass rod people for each compound type. How people in this experiment the people quickly. Many times, and should people rate through a series of experiments. Etc.
.First practice it. Each group presents methods to other groups joined the discussion and offer advice and improved methods ตามที่ได้รับ. Then practice it. Record the results and present what learn
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