Context

Theoretical Introduction

Chemistry is the science that studies matter, its components, properties, transformations, and the energies involved in these transformations. In the context of chemistry, components refer to the different substances that make up a system. For example, in a mixture of water and sand, water and sand are the components.

On the other hand, phases in a mixture refer to portions that exhibit uniform physical and chemical characteristics. Taking the mixture of water and sand as an example again, in this system, we have two distinct phases. The liquid phase, which is water, and the solid phase, which is sand.

The interface between learning the concepts of components and phases and their application in everyday life is through the study of mixtures. Mixtures are present in our daily lives. For example, the foods we consume, the medicines we take, the air we breathe are all mixtures.

Relevance of the Components and Phases Theme

The concepts of components and phases are extremely relevant in chemistry and have broad applications in industry and research. In the chemical and pharmaceutical industry, for example, understanding these concepts is crucial for the development of new drugs and the production of chemical products.

In research, understanding these concepts can lead to advances in various areas, such as nanotechnology, where the ability to manipulate materials at the atomic and molecular level requires a deep understanding of the components and phases present in the systems studied.

The study of these concepts also has a strong connection to the field of Biology, particularly in the investigation of biochemical processes that occur in cells, where different components and phases coexist and interact in complex ways.

Practical Activity

Activity Title: "The Chemistry in the Kitchen - exploring components and phases"

Project Objective

This project aims to explore the concepts of components and phases using a practical activity involving food processing in the kitchen, a daily activity that all students should be familiar with. Additionally, it aims to develop practical laboratory skills and stimulate collaboration and communication among students.

Detailed Project Description

The groups will select three different types of foods that undergo mixing processes during their preparation (for example, a cake, a natural juice, and a tomato sauce). For each food, the group must:

• Identify the components of the mixture (before and after preparation).
• Identify the phases of the mixture (before and after preparation).
• Explain how the transformations of the components and phases occur during the food preparation.
• Relate the observed chemical processes to concepts studied in Biology.

Required Materials

For the completion of this activity, the groups will need the following materials:

• Ingredients for the preparation of the selected foods.
• Kitchen items necessary for food preparation.
• Notebook for recording observations.
• Camera or cell phone to document the process and results.

Detailed Step-by-Step for Activity Execution

1. Form groups of 3 to 5 students.
2. Each group must choose three types of foods that undergo mixing processes during their preparation.
3. The groups should research and discuss the concepts of components and phases, using the suggested sources and others of their preference.
4. The groups should then prepare the selected foods, making detailed observations and records about the components and phases present before and after preparation.
5. After the practical activity is completed, the groups should analyze the results, correlating them with the theoretical concepts.

Project Deliverables

At the end of the project, each group must deliver:

1. Written Report: The report must contain the following items:

   • Introduction: Contextualization of the theme, relevance, real-world application, and project objective.

   • Development: Detailed explanation of the theory of components and phases. Detailed description of the practical activity, including methodology, presentation, and discussion of results.

   • Conclusion: Recap of the main points, lessons learned, and final conclusions about the project.

   • Bibliography: References used for the project.

2. Oral Presentation: Each group must prepare a 15-minute oral presentation summarizing the project, its results, and conclusions. In addition to reinforcing the learned content, this activity aims to develop students' communication skills.

3. Photo Gallery: Each group must submit a compilation of photos from the development of the practical activity, documenting the different stages of the process. These photos should be inserted throughout the written report to illustrate the activity carried out and the results obtained.