Stage Movement and Blocking
Exploring how actors use movement, stage positions, and gestures to communicate relationships and narrative.
Key Questions
- How does an actor's proximity to another character convey their relationship?
- Evaluate the effectiveness of different blocking choices in highlighting dramatic tension.
- Design a blocking sequence for a short scene that emphasizes a character's isolation.
Ontario Curriculum Expectations
About This Topic
The Law of Conservation of Mass is a cornerstone of physical science, stating that matter cannot be created or destroyed in a chemical reaction. Students learn to balance chemical equations to reflect this reality, ensuring that the number of atoms for each element remains constant. This topic connects to Ontario's emphasis on quantitative relationships and the predictive power of science.
By mastering equation balancing, students develop the skills needed for stoichiometry and environmental chemistry. This topic particularly benefits from hands-on, student-centered approaches where students use physical counters or digital simulations to 'balance' the reactants and products, making the abstract math visible.
Active Learning Ideas
Inquiry Circle: The Sealed Bag Lab
Students mix vinegar and baking soda inside a tightly sealed heavy-duty bag on a digital scale. They observe that despite the fizzing and gas production, the total mass remains unchanged.
Stations Rotation: Equation Balancing Puzzles
Stations feature unbalanced equations and physical 'atom' tokens. Students must arrange the tokens to match the equation and then determine the correct coefficients to balance the reaction.
Think-Pair-Share: Where Did It Go?
Show a video of a candle burning on a scale where the mass appears to decrease. Students discuss in pairs where the 'missing' mass went and how to prove it still exists.
Watch Out for These Misconceptions
Common MisconceptionMass is lost when a gas is produced in an open container.
What to Teach Instead
The gas has mass but has escaped into the atmosphere. Performing reactions in both open and closed systems helps students see that the 'loss' is just a measurement limitation.
Common MisconceptionYou can change the subscripts in a chemical formula to balance an equation.
What to Teach Instead
Changing subscripts changes the substance itself; only coefficients can be adjusted. Using molecular model kits helps students see that H2O and H2O2 are entirely different molecules.
Suggested Methodologies
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Frequently Asked Questions
How can active learning help students understand conservation of mass?
Why do we balance chemical equations?
What is a coefficient in a chemical equation?
What happens to atoms during a chemical reaction?
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