Lesson Title: Drops on a Penny
Lesson Length: 3 days, 45 minutes each
Materials Needed: Pennies, water dropper, liquid soap, cups, plates, tweezers, water, small counting cubes
Objectives: Students will be able to understand the science process by observing and recording data from their investigation.
Vocabulary: Water cohesion, surface tension
Focus: Class discussion: Teacher has a clear cup with water, filled to the top of the cup. Teacher has about 50 small counting cubes. “How many cubes do you think I can put in this cup before it overflows?” Class offers answers, discusses, teacher places cubes into the cup one at a time as the students observe.
Instruction: Teacher reads the worksheet labeled Drops on a Penny Lab. "Will someone in the class tell me how many drops of water you think will fit on this penny?"
Guided Practice: Teacher explains the lab set-up and procedures to the students. Instructions are on each table. Students make their predictions.
Check for Mastery: Teacher asks the students to verbalize what they saw during the experiment.
Independent Practice: Students explain in their science journals what they observed during the lab and draw a picture labeling the appropriate parts.
Closure: Class comes back together and discusses what each group observed. Follow with higher-level questioning.
Enrichment: Water cohesion video
Evaluation / Assessment: Teacher will engage in discussion with the students and evaluate their journal entries.
Schedule of Lesson: Day 1: Open the lesson with the students observing the first experiment. Class will complete and discuss water cohesion and surface tension worksheet.
Day 2: Teacher will review with students the experiment from Monday, review vocabulary. Begin the Drops on a Penny lab.
Day 3: Teacher will lead a discussion with students about what they observed during the lab. Students will write in their science journals what they observed during the lab, and draw a picture, and label the picture appropriately.
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