Science_Lesson

Science Lesson Barry C. Archie LT512 Science Lesson Directed Reading Lesson Class Description: High school, grades 9-10; integrated science honors course. Students are of heterogeneous ability levels- below , average, above average. We have just completed your unit on chemical reactions. In this lesson we will introduce solutions, acids, and bases that are used to make chemical reactions. Unit: Solutions, Acids, and Bases Topic: Solutions Unit Goals: At the conclusion of the unit, students will be able to: 1. Identify the different types of solutions. 2. Explain what how solutions are formed. 3..Compare and Contrast acids and bases. Lesson Objectives: Student will: 1. Write the definitions for the following terms: solution, solute, solvent, aqueous solution. 2. Describe three solutes and three solvents that you encounter in your life every day. 3. Classify the three types of solutions (liquid, gas, solid) when given an example of the solution. 4. Explain how a substance dissolves , and how the rate of dissolving can be controlled. Performance Assessment Objective Performance Assessment 1. Collect and review of vocabulary story paragraph completed in group work. 2 Class discussion on the three different solutes and solvents that the class members encounter every day. 3. Completed graphic organizer: class discussion of graphic organizer. Collect and review graphic organizer. 4. Class discussion of group project- using a poster board to give a visual representation of how a substance dissolves and how to control the rate in which it dissolves. Reading Type: Reading to be informed Macrostructure Thinking for Reading: Classification/categorization( other thinking skills employed in lesson: comparison and contrast, cause and effect.) Materials  Text chapter ”How Solutions Form”  Clear plastic cups  Sugar, Syrup, Dirt  Men’s cologne  Molding clay, two different colors  Venn diagram handout sheets  White poster boards  Color markers Procedure 1. Readiness a. Motivation: Call students attention to the front of class. Explain that you are about to give some demonstrations, and that you will be asking questions. Explain that you want them to think about what they are observing before they answer. Take out three clear plastic cups, pour 40mls of water into each. “ I have pour 40mls of water in each of these cups, and I have 10 grams of sugar, syrup and dirt in each one of these graduated cylinders. What will happen when I pour each of the cylinders contents into a cup of water'” Expected student responses: They are going to mix with the water. “Which substance will mix/dissolve the fastest'” Expected student responses: Responses will vary but most will say sugar. Pour the solids into the water and let them set as you give the students an oral illustration of solutions. “ Today we begin our study of solutions. We will be discussing what defines a solution, and the different types of solutions. Let’s look at the cup containing sugar. [ Show the students the cup containing the sugar, by this time the sugar should have dissolved] This cup contains water and sugar. Can you still see the sugar inside the cup[no]. No, you cannot see the sugar in the cup. How about the cup containing the syrup[show the students the cup containing the syrup, by this time most of the syrup will have dissolved in the water], can you see the syrup inside the cup '[yes, a little, some of it]. Not easy to determine is it ' You can see that the color of the water has changed but you cannot see two layers of liquids. Finally, let’s look at the cup containing the dirt[ show the students the cup containing dirt]. Can you see the dirt in the cup , [yes]. Ok, remember what you saw in the different cups as I read the first paragraph of the section on solutions.”