Changes of State - Objectives Labels

In Lesson 4.9, titled 'Changes of State', students are set to engage in a scientific exploration of how materials transition between different states of matter. The objective for the day is to observe and understand that certain materials can change from one state to another when subjected to heating or cooling. To achieve this, students will actively measure or research the specific temperatures, in degrees Celsius (°C), at which these changes occur for various substances. This hands-on experience aims to provide a concrete understanding of the thermal thresholds that govern state changes in materials.

To assess their grasp of the concepts covered, students will be asked to answer a series of questions. They will reflect on whether they can articulate that changes of state are reversible and elucidate the meaning behind this. Furthermore, they will be expected to accurately define key terms associated with state changes, namely melting, freezing, evaporation, and condensation. Lastly, students will demonstrate their knowledge by explaining the necessity of temperature changes to initiate transitions between different states of a substance. This evaluation will help confirm their comprehension of the fundamental principles of matter and its transformations.