Objectives (5 - 7 minutes)

1. Provide a clear understanding of the concept of matter and its physical, chemical, and organoleptic properties.

   • Define matter as anything that has mass and occupies space, and explain how matter can exist in different states (solid, liquid, gas).
   • Describe the physical properties of matter, such as color, odor, density, melting point, and boiling point.
   • Introduce the chemical properties of matter, including reactivity, flammability, and the ability to form new substances through chemical reactions.
   • Explain the organoleptic properties of matter, which are perceived by our senses, such as taste, texture, and shine.

2. Enable students to distinguish between the physical, chemical, and organoleptic properties of matter.

   • Provide practical and everyday examples to illustrate the difference between these properties.
   • Encourage observation and critical thinking so that students can identify and describe the properties of matter in different situations.

3. Develop scientific and logical thinking skills in students.

   • Encourage hypothesis formulation and the conduct of simple experiments to test these hypotheses.
   • Promote classroom discussion and idea exchange among students to deepen understanding of the topic.

Introduction (10 - 12 minutes)

1. Recalling Previous Content: The teacher should start the lesson by recalling basic chemistry concepts that have already been studied, such as atoms, molecules, and the difference between substances and mixtures. This step is crucial to ensure that students have the necessary foundation to understand the properties of matter that will be addressed in the current lesson.

2. Problem-Solving Scenarios: Present students with two problem-solving scenarios involving the understanding of the properties of matter:

   • Scenario 1: "Why does water turn into ice when placed in the freezer, but into vapor when heated?"
   • Scenario 2: "Why can the color of an object change when exposed to the sun for a long period of time?"

   These questions should serve as a starting point for the discussion and exploration of the lesson topic.

3. Contextualization: Next, the teacher should contextualize the importance of studying the properties of matter, highlighting how these concepts are applied in various areas of science and technology. Examples may include drug manufacturing, food production, and materials engineering.

4. Engaging Students' Attention: To spark students' interest, the teacher can share some curiosities or interesting facts related to the topic:

   • Curiosity 1: "Did you know that gold, which we normally associate with the color yellow, can be found in various other colors? This is due to its chemical and physical properties, which can be altered under certain conditions."
   • Curiosity 2: "Have you ever wondered why rainbows appear after rain? This happens because light, which is also a form of matter, behaves differently when passing through water droplets in the air."

   These curiosities should serve as a starting point for the discussion on the physical, chemical, and organoleptic properties of matter.

Development (20 - 25 minutes)

1. Theory - Physical Properties of Matter (5 - 7 minutes)

   • The teacher should start by explaining the physical properties of matter, which are characteristics that can be observed or measured without altering the substance's composition.

   • Color, smell, density, melting point, and boiling point should be highlighted as examples of physical properties.

   • The teacher can use practical examples, such as the fact that water boils at 100 degrees Celsius at sea level, regardless of its source, to illustrate these properties.

   • Additionally, the teacher should emphasize that physical properties can vary depending on conditions (for example, water boils at a lower temperature at higher altitudes).

2. Theory - Chemical Properties of Matter (5 - 7 minutes)

   • Next, the teacher should introduce the chemical properties of matter, which refer to a substance's ability to react and form new substances.

   • Chemical properties are observed only when a chemical change occurs, such as a chemical reaction.

   • The teacher can use the example of rusted iron to illustrate chemical properties.

   • It should be emphasized that chemical properties do not change, regardless of the amount of substance present (for example, iron always rusts when exposed to air and moisture).

3. Theory - Organoleptic Properties of Matter (5 - 7 minutes)

   • Next, the teacher should explain the organoleptic properties of matter, which are those that can be perceived by our senses.

   • Taste, smell, texture, appearance, and shine are examples of organoleptic properties.

   • The teacher can use everyday examples, such as the sweet taste of sugar, the smell of coffee, the sticky texture of honey, the shiny appearance of gold, and the brightness of the sun to illustrate these properties.

4. Practical Activity - Classifying Matter Properties (5 - 7 minutes)

   • To reinforce learning, the teacher should propose a practical activity.

   • Students will be divided into groups and given a list of different substances (such as water, iron, salt, sugar, paper, plastic, etc.) and a list of properties (such as color, smell, density, melting point, reactivity, taste, texture, shine, etc.).

   • Students should classify each property as physical, chemical, or organoleptic for each substance.

   • This activity will not only reinforce students' understanding of the properties of matter but also develop their critical thinking and classification skills.

5. Discussion and Feedback (3 - 5 minutes)

   • After the activity, the teacher should lead a classroom discussion, allowing students to share their answers and reasoning.

   • The teacher should provide constructive feedback and correct any misunderstandings.

   • This step is crucial to ensure that all students have understood the concepts presented and can apply them correctly.

Return (8 - 10 minutes)

1. Connection to the Real World (3 - 4 minutes)

   • The teacher should revisit the problem-solving scenarios presented at the beginning of the lesson and ask students, now with the knowledge acquired, to try to solve them.

   • For example, the situation of why water turns into ice and vapor at different temperatures can be explained based on the physical properties of matter.

   • The same can be done with the situation of an object changing color when exposed to the sun, which can be explained based on the chemical properties of matter.

   • This activity will help solidify students' understanding of the topic and the practical application of their knowledge.

2. Concept Review (3 - 4 minutes)

   • The teacher should quickly review the main concepts covered in the lesson, emphasizing the definition of matter and the differences between its physical, chemical, and organoleptic properties.

   • It is important for the teacher to reinforce the practical examples used during the lesson to illustrate each type of property.

3. Individual Reflection (2 - 3 minutes)

   • Finally, the teacher should propose that students reflect individually for a minute on the questions: "What was the most important concept learned today?" and "What questions have not been answered yet?".

   • Students can write down their answers in a notebook or share them orally with the class.

   • This activity will help identify any gaps in students' understanding and which topics may need review in future lessons.

4. Feedback and Closure (1 minute)

   • The teacher should end the lesson by thanking the students for their participation and providing brief feedback on what went well and what can be improved.

   • It is also important to encourage students to continue exploring the topic on their own and to ask questions whenever they have doubts.

Conclusion (5 - 7 minutes)

1. Content Summary (2 - 3 minutes)

   • The teacher should start the Conclusion by summarizing the main points of the lesson. This includes the definition of matter, the physical, chemical, and organoleptic properties of matter, and how to distinguish between them.

   • The teacher can conduct a quick oral quiz to check if students can recapitulate these concepts. This will help reinforce learning and identify any areas that may need additional review.

2. Connecting Theory to Practice (1 - 2 minutes)

   • The teacher should then highlight how the lesson connected theory to practice. This may include references to practical activities performed, such as classifying matter properties, and how they helped apply and understand theoretical concepts.

   • The teacher can also mention the problem-solving scenarios discussed at the beginning of the lesson and how students were able to apply their knowledge to solve them.

3. Additional Materials (1 - 2 minutes)

   • The teacher should suggest additional study materials for students who wish to deepen their understanding of the topic. This may include chemistry books, educational websites, explanatory videos, and practical activities that can be done at home.

   • For example, the teacher may suggest that students try to identify and describe the properties of matter in different objects around them, or research how matter properties are used in different industries and technological applications.

4. Topic Importance (1 minute)

   • Finally, the teacher should summarize the importance of the topic for daily life and other areas of knowledge.

   • The teacher may highlight how understanding the properties of matter is fundamental for the comprehension of natural phenomena, for the production and manipulation of materials in industry, and for the application of many technologies we use daily.

   • The teacher can also reinforce the importance of observation and critical thinking, skills that were exercised during the lesson, for problem-solving in various areas of life.