7E Lesson Plan_Chemistry

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Topic / Title Acids and Bases Grade Level Grade 7 Time Allotment 90 minutes Teacher Dahlia M. Maputol Learning Competency Investigate the properties of acidic and basic mixtures using natural indicators Objectives By the end of class, students should be able to: Investigate the properties of acidic and basic mixtures using natural indicators. Give examples of acids and bases that they encounter in their everyday life. ELICIT (Access prior knowledge). Materials/Assessment Tool Students are grouped into 4 with names element, compound, homogeneous and heterogeneous mixtures. The group will say “kami yun” when the description given by the teacher refers to them. The description are as follows: has more than one type of atom 4 Group labels (written in separate parts can be seen bondpaper/colorbond) has two or more substances components are physically combined Occupies space and has mass Students will further answer the following questions briefly: What are some classifications of matter? How is matter classified? In today’s lesson, we will classify certain groups of matter in a different way based on their distinctive properties. ENGAGE (Get the students’ minds focused on the topic (short; question or picture). Show pictures of different swimming pools. Let students focus on the swimming pool crowded with a lot of people. Make them Pictures of swimming pool realize how contaminated that swimming pool is and its effect to humans when not treated. For health reasons, swimming pools are regularly treated with chemicals that are usually called “chlorine” (Calcium hypochlorite or sodium hypochlorite) as disinfectants. The effectiveness of these disinfectants depends on how acidic or basic the water is. Pool owners must therefore measure and, if necessary, adjust, the acidity of their pool through a pH test kit. What do the terms acidic, basic and pH test mean? EXPLORE (Provide students with a common experience). To give students the idea on how they will classify substances, the teacher will mix the prepared substances to show color changes. Key Question: Why does a substance give a distinctive color when mixed with other substance?

Students will perform the activity “Acids and Bases in the Home.” The activity aims to investigate the properties of acidic and basic mixtures using plant indicator and classify them as acid or base. Key Questions: 1. What color is the indicator in acidic solution? In basic solution? 2. Are cleaning products more likely to be acidic or basic? 3. Are food products more likely to be acidic or basic?

Mixtures of turmeric and rubbing alcohol, baking soda and water, and vinegar

10 Different household solutions 3 Plastic teaspoons Plastic egg tray or 10 party cups made into saucers 3 Plant indicators freshly

The teacher will assess students’ laboratory activity performance by group. The teacher should see that the students follow the procedure and safety precautions in activity.

prepared Apron Mask Rubber gloves Laboratory performance rating sheet

EXPLAIN (Teach the concept. Should include interaction between teacher and students). Each group will present their laboratory report. After the report, Laboratory Performance the teacher will give inputs on important concepts missed by the rating sheet students. He will also give feedback on their laboratory activity group performance. ELABORATE (Students apply the information learned in the Explain). 1 cup water in a party cup Empty party cup The students will perform the activity “What does an antacid do?” Antacid tablet Acids are said to “neutralize” bases, and vice versa. In this activity Vinegar the students will investigate the effect of these substances to each Plant indicator other and define the word neutralize. This will lead them to answer the question: Experiment Design Rating How does an antacid work to counteract excess stomach acid? Sheet Peer Assessment EVALUATE (How will you know the students have learned the concept)? Students are evaluated in each phase of the lesson. EXTEND (Deepen conceptual understanding through use in new context). Short-answer response Part A (individual). Proper Handling of Acids and Bases 1. Read labels of acidic and basic household substances found in your home. 2. Write briefly your practice of handling these products safely. Part B (by group). The Acid Rain 1. Explain the acid rain phenomenon 2. Describe the impact of acid rain on humans and the environment. 3. Give ways of preventing the adverse effects of acid rain. References DepEd Grade 7 Science Learner’s Material Chemistry the Physical Setting. Myers. et.al. https://www.youtube.com/watch?v=fsWXYSw6O_c