Take act ion As you write the report and apply the scientific method , you will learn the steps that rigorous work requires, from planning it to publishing the results. This will help you to become a valuable professional , and you will be able to contribute to sustainable development. Target 4.4: "By 2030, substantially increase the number of youths and adults who have relevant skills, including technical and vocational skills, for employment, decent jobs and entrepreneurship." Most of the matter around us is in a solid, liquid or gaseous state. Which of the following characteristics correspond to each state? • It has a fixed shape. • It has a fixed volume. • It can be compressed. • It expands. • It needs to be in a container to handle it (say whether the container is open or closed). What is a homogeneous mixture? What about a heterogeneous mixture? Give examples, indicating which substances make up the mixture in each case. WORK WITH THE IMAGE Imagine that this glass has been left on a table to observe how it evolves over time. In what physical state is the glass? What about the red matter? And the white matter? Why is the white matter coming out of the glass? Will all the white matter come out of the glass? Will we stop seeing it as white matter? Explain what is happening to it. Will room temperature influence the process? L E T ' S G E T S TA R T E D IN THIS UNIT. . . Gases The gas laws. The BoyleMariotte law. Gay-Lussac's law. Charles' law The general ideal gas equation The ideal gas equation of state The kinetic theory of gases Solutions 9
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