Begin the lesson by asking students: 'What do you think happens when you fill a balloon with air?' This question will engage students' curiosity and set the stage for exploring gases.

Explain that air is a type of gas. Unlike solids and liquids, gases do not have a fixed shape or size. Use examples like balloons to illustrate how gases can fill up space.

Introduce the concept of gases using the 'Lighthouse Lab – Matter' video. This video provides a comprehensive overview of matter, including gases, and helps students relate the concept to everyday experiences.

Conduct a demonstration by blowing up a balloon. Ask students to observe how the balloon changes shape as it fills with air. Discuss what happens to the air when the balloon pops.

Have students participate in a hands-on activity where they fill balloons with air and observe the changes. Encourage them to predict what will happen if the balloon is released or pops.

Assign the 'Describing Matter' worksheet, where students describe various objects, including gases, to reinforce their understanding of matter's properties.

Engage students in a discussion about what they learned. Ask questions like: 'Why do you think gases don't have a fixed shape?' and 'What happens to the air when a balloon pops?'

Review the key concepts of gases and their properties. Encourage students to share their observations and reflections on the hands-on activities.

Use the 'What Is Matter?' assessment to evaluate students' understanding of matter, including gases. This worksheet helps assess comprehension through visual comparisons and true or false questions.

Encourage students to take the Unit Quiz to test their knowledge of gases and other states of matter.