Physics · Grade 12

Active learning ideas

Bernoulli's Principle and Applications

Active learning works for Bernoulli's principle because the abstract relationships between pressure, speed, and height come alive when students manipulate physical objects. By observing real-time changes in airflow and pressure, students build intuitive understanding that static diagrams or lectures cannot provide.

• Ontario Curriculum Expectations
• HS.PS2.A.1

• 15–50 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Problem-Based Learning
• 15 min · Pairs

Demonstration: Paper Strip Lift

Provide each pair with a strip of paper taped at one end. Students predict and observe what happens when they blow over the top edge. Discuss pressure differences and relate to wing shape. Extend by varying blow speed and recording qualitative observations.

Explain how Bernoulli's principle relates fluid speed, pressure, and height.

Facilitation Tip

During the Paper Strip Lift demonstration, hold the paper strip horizontally at table level to avoid accidental curling, which can distort airflow and confuse students.

What to look for

Present students with a diagram of a Venturi tube. Ask them to label the points of highest and lowest pressure and explain why, referencing fluid speed and Bernoulli's principle in their answer.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management
• Relationship Skills

Activity 02

• Collaborative Problem-Solving
• 45 min · Small Groups

Collaborative Problem-Solving: Venturi Tube Pressure

Set up clear tubes with narrow sections and connect manometers. Small groups run water or air through, measure speed and pressure at points, and plot data to verify Bernoulli's equation. Groups compare results and identify sources of error.

Analyze how Bernoulli's principle explains the lift generated by an aircraft wing.

Facilitation Tip

In the Venturi Tube Pressure lab, ensure all tubing connections are tight to prevent air leaks that would create inconsistent pressure readings.

What to look for

Pose the question: 'How does a curveball curve in baseball?' Facilitate a class discussion where students must apply Bernoulli's principle and fluid dynamics to explain the phenomenon, considering the spinning ball's effect on airflow.

• Apply
• Analyze
• Evaluate
• Create
• Relationship Skills
• Decision-Making
• Self-Management

Activity 03

• Problem-Based Learning
• 50 min · Small Groups

Design Challenge: Bernoulli Lifter

Teams design a device using fans, paper, or balls to demonstrate lift or suction. They sketch plans, test prototypes, and present how Bernoulli explains their success. Class votes on most effective design.

Design a system that utilizes Bernoulli's principle for a practical purpose.

Facilitation Tip

For the Bernoulli Lifter design challenge, provide clear constraints on material use and time limits to focus the creative process.

What to look for

Students receive a scenario describing a fluid flow situation (e.g., water in a pipe with a constriction, air over a wing). They must write one sentence explaining the pressure change and one sentence explaining the resulting force or motion.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management
• Relationship Skills

Activity 04

• Simulation Game
• 30 min · Whole Class

Simulation Game: Wing Angle Testing

Use online applets or straw-and-ping-pong ball setups. Whole class tests wing angles or ball hover heights, records data, and graphs lift versus speed. Debrief connections to aircraft design.

Explain how Bernoulli's principle relates fluid speed, pressure, and height.

Facilitation Tip

During the Wing Angle Testing simulation, set specific angle increments (e.g., 5 degrees) so students can systematically observe pressure changes.

What to look for

Present students with a diagram of a Venturi tube. Ask them to label the points of highest and lowest pressure and explain why, referencing fluid speed and Bernoulli's principle in their answer.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

A few notes on teaching this unit

Experienced teachers approach Bernoulli's principle by blending hands-on activities with targeted questioning to confront misconceptions directly. Avoid starting with the equation; instead, let students discover the relationships through experiments and then formalize their observations with Bernoulli's equation. Emphasize that the principle applies to both liquids and gases, using air demonstrations to reinforce this idea. Research shows that students retain concepts better when they see counterintuitive outcomes, so design activities where their predictions fail before guiding them to correct explanations.

Successful learning looks like students confidently predicting pressure differences in fluid systems and explaining lift or flow behavior using Bernoulli's equation. They should connect mathematical relationships to physical demonstrations and design tasks, demonstrating both conceptual and quantitative mastery.

---

Watch Out for These Misconceptions

• During the Paper Strip Lift demonstration, watch for students assuming air travels equal distances over and under the curved paper.

  Use a hairdryer on low heat to create visible airflow over the curved strip, and ask students to trace the path of the air with their fingers to observe streamlines. Measure the time it takes for the strip to rise at different angles to connect shape and pressure differences.

• During the Bernoulli Lifter design challenge, watch for students attributing lift solely to Bernoulli's principle without considering Newton's third law.

  Have students tape a small piece of paper to the top of their lifter and observe how air is deflected downward as the lifter rises. Use a force sensor to measure upward thrust and discuss how momentum change contributes to lift.

• During the Wing Angle Testing simulation, watch for students believing Bernoulli's principle applies only to liquids.

  Use the simulation’s density slider to switch between water and air, and ask students to compare pressure readings in both fluids. Use a balloon to demonstrate that air, while compressible, behaves similarly to liquids at low speeds when confined in a tube.

---

Methods used in this brief

• Problem-Based Learning
• Collaborative Problem-Solving
• Simulation Game