Begin the lesson by discussing everyday examples of melting and freezing, such as ice melting on a warm day or water freezing in a freezer. This will help students relate to the topic and spark their curiosity.
Go to the LessonLesson Plans
Melting and Freezing
Learning Objectives
- Understand that heating can cause a solid to change into a liquid, a process called melting.
- Recognize that cooling can cause a liquid to change into a solid, a process called freezing.
- Identify examples of materials that melt or freeze at different temperatures.
Introduction and Hook
Direct Instruction
Explain the processes of melting and freezing using simple definitions and examples. Highlight that heating can cause a solid to become a liquid (melting) and cooling can cause a liquid to become a solid (freezing).
Use the video 'Heating Matter and Changes in State' to visually demonstrate how heating affects states of matter, focusing on melting and freezing. This video will help solidify students' understanding of the concepts.
Guided Exploration
Engage students in a discussion about different materials that melt or freeze at various temperatures. Encourage them to think of examples from their daily lives.
Watch the video 'Reversible and Irreversible Changes to Matter' to explore how melting and freezing are reversible changes. This video will help students understand the concept of reversibility in matter changes.
Hands-On Activity
Conduct an experiment where students observe the melting of ice cubes and the freezing of water. Have them record their observations and discuss the changes they see.
Use the assessment 'Properties and Temperature' to guide students through melting and cooling crayons. This hands-on activity helps reinforce their understanding of how temperature affects material properties.
Independent Practice
Assign students to find objects at home that undergo melting or freezing and document their findings with drawings or photos.
Check for Understanding
Use the assessment 'Reversible and Irreversible Change' to evaluate students' understanding of reversible changes like melting and freezing. This assessment encourages students to apply their knowledge practically.
Review and Reflection
Have students share their observations and findings from the independent practice. Discuss any surprises or new insights they gained about melting and freezing.
Assessment and Extension
Administer the 'Review – Changes to Matter' assessment to gauge students' comprehension of the lesson. This assessment covers key concepts like melting, freezing, and reversible changes.
Try the Quiz
