Lung Model Experiment

This activity allows students to create a simple lung model to simulate and visualize the effects of vaping on lung function. In small groups, the exercise will help students understand how vaping can alter the performance of lungs in a clear, hands-on manner.

Objectives

• Build a simple lung model using common materials.
• Simulate how vaping impacts lung function.
• Observe and record changes in the model when subjected to simulated conditions.

Materials Needed

• A clear plastic bottle (to represent the lung chamber)
• Balloons (to serve as lung mimicry)
• Straws (to simulate airways)
• Modeling clay or tape (to secure components)
• A syringe or pump (optional, to simulate inhalation/exhalation events)
• Water (to simulate the presence of vapor particles)

Instructions

1. Creating the Lung Chamber:

   • Cut the bottom of the plastic bottle to allow a better view of the inside.
   • Stretch one or two balloons over the opening of the bottle; these will act as the lung tissue. Secure tightly with a rubber band or tape.

2. Setting Up Airways:

   • Insert a straw into the bottle through a small hole, ensuring it reaches near the balloon's surface to represent bronchial tubes.
   • Seal any gaps around the straw with modeling clay to prevent air leaks.

3. Simulating Lung Function:

   • Carefully squeeze the bottle to observe how the balloon (lung tissue) responds.
   • Discuss with your group how controlled contraction and relaxation of the lungs (balloon inflation and deflation) relate to breathing.

4. Simulating Vaping Effects:

   • Before simulating vaping, record the normal lung function. Provide observations on how the balloon moves and inflates.
   • Add a small amount of water (to mimic aerosolized particles) near the inner walls of the bottle.
   • Gently mix the water around and then repeat the squeeze test. Observe differences in the balloon's movement and the ease of inflation.

5. Document Findings:

   • Write down your observations on any changes between the normal lung model and after simulating vaping effects.
   • Note if the balloon appears less flexible, inflates more slowly, or any visual changes that indicate potential damage or restriction.

Discussion Questions

• How did the water (vaping simulation) affect the balloon's behavior compared to the normal state?
• What parallels can you draw between your model and real lungs exposed to vaping?
• How might continuous exposure to vaping change lung function over a longer period?

Reflection

After the experiment, gather in your group to discuss the following:

• What were the most noticeable changes in the lung model when simulating vaping?
• How does this activity help you understand the potential health risks associated with vaping?
• In what ways can this model be improved to better simulate lung behavior?

Follow-Up

Conclude the activity by sharing your findings with the class and comparing observations. Reflect on how a simple model can demonstrate complex biological processes and discuss ways to further explore the impact of external factors like vaping on lung health.

Experiment Assessment Criteria

This rubric is designed to evaluate student performance during the vaping experiment. The criteria focus on understanding the scientific concepts, active participation, effective teamwork, and the ability to draw relevant conclusions from the experiment. Teachers can use this rubric to provide objective feedback and identify areas for improvement.

Scoring Scale

Each criterion is evaluated on a 4-point scale:

• 4 - Excellent: The student meets or exceeds expectations with strong evidence of mastery.
• 3 - Good: The student meets expectations with minor errors or omissions.
• 2 - Satisfactory: The student demonstrates basic understanding but with noticeable gaps.
• 1 - Needs Improvement: The student does not meet the expected level and requires additional support.

Rubric Criteria

Using this Rubric

Teachers should review each group’s performance using each criterion and provide constructive feedback based on the scale. This rubric can be discussed with students beforehand to set clear expectations and encourage self-assessment during the experiment.