Review: | (1) All bacteria are harmful -- True or False? (2) In last week's investigations, which method proved more effective at getting the glo-gel off hands: hand sanitizer or washing with soap and water? (3) What was the conclusion of the group that investigated whether it was more effective to wash hands with soap and water for 15 seconds vs. 30 seconds? (4) The group investigating water temperature also ended up having varying the method of drying the hands afterwards. Would this affect the findings of their investigation or not? (5) In this article, "We Tried 7 Ways to Hard-Boil Eggs and Found a Clear Winner," identify:
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Today's Objectives: | (A) Identify the different components of a soap molecule (B) Demonstrate the hydrophobic and hydrophilic properties of soap (C) Describe how soap works with water to remove dirt from a surface |
Also in today's class: a visit from our Advisor, Abra.
Go to RESOURCES for links to documents and websites referred to in class today.
Vocabulary | particle, atom, molecule, hydrophobic, hydrophilic |