Science · Grade 10

Active learning ideas

Conservation of Energy

Active learning helps students grasp conservation of energy because transformations become visible when they manipulate physical systems. Moving from abstract equations to hands-on measurement makes the constant total energy concept tangible and memorable for grade 10 learners.

• Ontario Curriculum Expectations
• HS-PS3-2

• 35–50 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Inquiry Circle
• 40 min · Pairs

Pendulum Lab: Energy Forms

Pairs set up pendulums with string and masses, release from measured heights, and time swings. Use formulas to compute potential and kinetic energy at key points, then graph totals. Compare ideal predictions to measured values, noting friction effects.

Explain the Law of Conservation of Energy in various physical systems.

Facilitation Tip

During the Pendulum Lab, remind students to measure the release point and release angle consistently to reduce variability in their data.

What to look for

Present students with a diagram of a bouncing ball. Ask them to identify at least two points where energy is primarily potential, two points where it is primarily kinetic, and one point where energy is lost to heat and sound. Have them write their answers on a mini-whiteboard.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 02

• Inquiry Circle
• 45 min · Small Groups

Roller Coaster Model: Track Building

Small groups construct foam pipe tracks for marbles, marking heights for potential energy calculations. Release marbles, measure speeds with timers at points, and tally total energy. Revise designs to minimize losses and retest.

Analyze how energy is conserved even when friction or air resistance are present.

Facilitation Tip

Have students label each energy transformation step on their Roller Coaster Model before building to ensure accurate calculations.

What to look for

Provide students with a scenario: A 10 kg box slides down a frictionless ramp from a height of 5 meters. Ask them to calculate the box's speed at the bottom of the ramp. They should show their work, including the initial potential energy and final kinetic energy calculations.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 03

• Inquiry Circle
• 35 min · Pairs

Circuit Chain: Transformation Demo

Pairs wire batteries, bulbs, motors, and fans in series. Predict and measure energy shifts from chemical to light, heat, and motion using voltmeters. Record before-and-after totals to confirm conservation.

Predict the energy transformations in a closed system over time.

Facilitation Tip

Circulate during the Circuit Chain to check that students are tracking voltage drops and current changes at each resistor in their diagrams.

What to look for

Pose the question: 'Imagine a car braking to a stop. Where does the car's kinetic energy go?' Guide students to discuss the transformation of kinetic energy into thermal energy due to friction in the brakes and tires.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 04

• Inquiry Circle
• 50 min · Small Groups

Rube Goldberg: Energy Path

Small groups design a simple chain with dominos, ramps, and balls to show multiple transformations. Test the sequence, diagram energy forms at each step, and calculate efficiency. Share and critique paths with the class.

Explain the Law of Conservation of Energy in various physical systems.

Facilitation Tip

Before starting the Rube Goldberg activity, ask students to sketch their intended energy path so you can correct misconceptions early.

What to look for

Present students with a diagram of a bouncing ball. Ask them to identify at least two points where energy is primarily potential, two points where it is primarily kinetic, and one point where energy is lost to heat and sound. Have them write their answers on a mini-whiteboard.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

A few notes on teaching this unit

Teach conservation of energy by starting with simple systems like pendulums before moving to complex ones. Use peer discussion to resolve discrepancies in calculations, letting students present their reasoning. Avoid rushing to equations; let students discover the relationships through measurement and repeated trials.

Successful learning looks like students correctly calculating energy totals, identifying transformations between forms, and explaining where energy goes in open systems. They should also address common misconceptions by citing evidence from their measurements and observations.

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Watch Out for These Misconceptions

• During the Pendulum Lab, watch for students who assume the pendulum stops because energy is lost entirely.

  Use the thermometer to measure temperature increases at the pivot point, then have students calculate the energy converted to heat and compare it to the missing mechanical energy.

• During the Roller Coaster Model activity, watch for students who believe the coaster gains extra energy on steeper drops.

  Provide a data table for students to record height and speed at each point, then guide them to verify that potential energy loss equals kinetic energy gain minus friction losses.

• During the Circuit Chain: Transformation Demo, watch for students who think the battery creates energy continuously.

  Have students measure voltage drops across each resistor and discuss how energy is transformed into heat and light, reinforcing that the battery’s chemical energy stores are being depleted at a measurable rate.

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Methods used in this brief

• Inquiry Circle