Contextualization

The study of matter is fundamental to understanding the universe around us. Everything around us, whether solid, liquid, or gaseous, is composed of matter. To understand how matter behaves, interacts, transforms, or remains constant, we need to explore its properties and associated concepts, such as density, mass, volume, pressure, temperature, and the states of matter.

Matter is everything that has mass and occupies space. This concept is very broad and can be difficult to understand at first, as it includes not only tangible objects like books, chairs, and food, but also air, light, sound, and even thoughts! To deepen our understanding, we need to investigate what we call 'bodies' and 'objects.' A 'body' refers to a set of matter particles bounded by a surface. An 'object,' on the other hand, refers to the matter that constitutes a 'body'.

Importance of Studying Matter

Understanding the initial aspects of matter is crucial for explaining natural and technological phenomena, from cloud formation to the operation of a car engine. Furthermore, this knowledge forms the basis for the study of other scientific disciplines, such as biology, physics, and medicine. Understanding the properties of matter and its interactions allows us to manipulate matter for our benefit, leading to the development of new materials, medicines, energy sources, and technology.

Chemistry is the science that studies the composition, properties, and transformations of matter and its interactions with energy. Therefore, it becomes indispensable in everyday life. From the composition of the foods and beverages we consume, the fabrics of the clothes we wear, to the materials used in the construction of our homes and the manufacturing of our cars, everything involves chemistry.

Practical Activity

Activity Title: Exploring the Concepts of Matter: A Journey Through Chemistry and Physics

Project Objective:

The purpose of this activity is to develop students' understanding of the basic principles of matter through practical experiments and interdisciplinary connections between chemistry and physics. Students will also work on research, collaboration, communication, and argumentation skills.

Detailed Project Description:

Students will be divided into groups of 3-5 members. Each group will be responsible for conducting a set of practical experiments that will include the demonstration and study of the following chemistry and physics concepts:

1. Difference between matter, body, and object
2. Properties of matter: mass, density, and volume
3. States of Matter (solid, liquid, and gas)
4. Changes in the physical states of matter (melting, evaporation, condensation, and solidification)

Required Materials:

The materials below are necessary for conducting the experiments. Some of them can be found at home or purchased locally:

• Scale
• Measuring cups
• Various solids (rocks, wood, metal, plastic)
• Water and ice
• Glass containers
• Portable heater (or stove)
• Candle
• Canned soda
• Balloons
• Stopwatch
• Camera or smartphone for documentation

Step-by-Step for Activity Execution:

1. Defining matter, body, and object: Each group will discuss and present examples of matter, body, and object, based on their research and interpretation.

2. Properties of matter: Each group will choose different types of solid matter (such as rocks, wood, metal, plastic) and measure the mass and volume using the scale and measuring cups, respectively. They will then calculate the density of these objects.

3. States of matter and state changes: Each group will document physical changes in matter. They will observe and document how water changes its physical state when heated (from liquid to gas state) and when cooled (from gas to liquid and from liquid to solid state). They can use ice, liquid water, and water vapor to represent the three states.

4. Expansion and contraction: Students will observe how temperature changes can make matter expand or contract. They can inflate a balloon, cool it in the refrigerator, and observe the contraction. The same balloon will then be heated (for example, using a light bulb carefully) to observe the expansion.

5. Documentation and Report: Throughout all stages of the activity, students will document their observations, conclusions, calculations, and experiments through photos, recordings, graphs, and text.

Project Deliverables:

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

• A written report, divided into sections that include: introduction (with the contextualization of the experiments and the statement of purpose), development (explaining the theory behind the experiments, detailed description of each experiment, and the methodology used), results and discussion (presentation and interpretation of the experiment results), conclusions (description of the learning obtained and the applicability of the concepts learned), and the consulted bibliography.

• An oral presentation about the group's experience and findings. The presentation should involve all group members and include images, graphs, and possibly videos of the experiment.

The conclusion of the report should link back to the introduction and answer the question: