Parent plan · Week 7 · Mixtures, Solutions & Separation · Water’s Properties: Density, Floating & Surface Effects — Science 6: Matter, Energy & Earth Systems
Parent teaching plan · 36 weeksUnits to teach or revisit
Chapter 2 · Matter, Mixtures & Water Properties
- Unit 2.4 · Mixtures, Solutions & Separation
- Unit 2.5 · Water’s Properties: Density, Floating & Surface Effects
Assigned readings
This is the parent timetable. Learners follow chapter and unit names. Each chapter uses four consecutive weeks; dedicated consolidation, project, sample, and exam weeks make the complete 36-week plan.
This week’s goals
- Complete the named teaching, practice, investigation, or assessment tasks.
- Preserve quantities, mechanisms, and a meaningful evidence limit.
- Save a revised explanation and identify any concept needing reteaching.
Read the linked chapter opening and the background/short teaching parts named in each session. All required case information and investigation records are supplied on the site; external references are optional extensions. On assessment days, use the paper’s provided scenarios and relationships.
Five suggested 35–45-minute sessions. Midterm response blocks total 90 minutes; final response blocks total 135. The sample uses 45 minutes. Actual optional drying/observation can span longer intervals; use the supplied records when necessary and extend teaching for comprehension.
Session 1 · Mixtures, Solutions & Separation · Model and explain
Filtration separates particles that the filter traps. Evaporation can leave a dissolved solid behind, but the liquid enters the surroundings unless collected. Magnetic separation works only for responsive materials. No one method separates every mixture. Track where each substance goes and whether the method changes identity or merely separates. Recovery can be incomplete because material remains on tools or escapes the boundary. A separation result should not be treated as a drinking-water safety test.
Your task
For Mixtures, Solutions & Separation, study Parts 3–4 and attempt the worked case: Track the substances and mass at each stage, with one limitation. Explain the steps before opening the model.
- Prepare (5 minutes): retrieve the relevant idea and state today’s question.
- Read/examine (10 minutes): use the linked unit, diagram, or supplied record; note units and conditions.
- Apply (15–25 minutes): complete the task, showing evidence and reasoning before opening guidance.
- Reflect (5 minutes): revise one choice, explain the correction, and save the work.
Hint and response guidance
Begin with the actual observation, quantity, or diagram relationship. Explain how it bears on the question before making a broad claim.
After removing 3 g sand, 105 g of salt solution remains in the idealized model. After water enters the air, 5 g salt remains. The water is transferred, not destroyed. Real recovery may be incomplete; these assumptions do not show that the liquid was safe to drink.
- An accurate scientific claim answering the actual question.
- Relevant evidence or a labeled model with quantities and units when applicable.
- Reasoning that connects evidence with the mechanism rather than only repeats it.
- A specific method, boundary, scale, or alternative-explanation limit.
Session 2 · Mixtures, Solutions & Separation · Practice, revise and exit
Use practice as evidence of understanding. A selected definition can be checked automatically, while a written explanation needs human comparison with its mechanism and limits.
Your task
For Mixtures, Solutions & Separation, complete practice questions 1–6 and both choice checks, then answer independently: A filter removes visible dirt. Does that prove it removes dissolved chemicals or microbes? Save a correction explaining one changed claim or method.
- Prepare (5 minutes): retrieve the relevant idea and state today’s question.
- Read/examine (10 minutes): use the linked unit, diagram, or supplied record; note units and conditions.
- Apply (15–25 minutes): complete the task, showing evidence and reasoning before opening guidance.
- Reflect (5 minutes): revise one choice, explain the correction, and save the work.
Hint and response guidance
Begin with the actual observation, quantity, or diagram relationship. Explain how it bears on the question before making a broad claim.
No. Filter pore size and other treatment properties matter. Visible clarity alone cannot establish removal of dissolved substances or drinking safety.
- An accurate scientific claim answering the actual question.
- Relevant evidence or a labeled model with quantities and units when applicable.
- Reasoning that connects evidence with the mechanism rather than only repeats it.
- A specific method, boundary, scale, or alternative-explanation limit.
Session 3 · Water’s Properties: Density, Floating & Surface Effects · Read and distinguish
Calculate density from comparable measurements. A larger object can have a lower density than a smaller one. The reference liquid’s density also matters, so use stated classroom values rather than assume one floating result applies to every liquid. Buoyancy is an upward force from the surrounding fluid. A floating object displaces enough fluid for that force to balance its weight. A hollow shape can include air and increase the volume displaced before water enters, changing average density.
Your task
For Water’s Properties: Density, Floating & Surface Effects, read the background and chapter opening, study Parts 1–2, and write two observation/idea notes with the checkpoint responses. Keep calculations and units when applicable.
- Prepare (5 minutes): retrieve the relevant idea and state today’s question.
- Read/examine (10 minutes): use the linked unit, diagram, or supplied record; note units and conditions.
- Apply (15–25 minutes): complete the task, showing evidence and reasoning before opening guidance.
- Reflect (5 minutes): revise one choice, explain the correction, and save the work.
Hint and response guidance
Begin with the actual observation, quantity, or diagram relationship. Explain how it bears on the question before making a broad claim.
The 20 mL object: 12 ÷ 20 = 0.6 g/mL. The second is 2 g/mL; the equal masses do not imply equal floating behavior. It changes the object’s geometry and enclosed air, allowing different displacement and average density.
- An accurate scientific claim answering the actual question.
- Relevant evidence or a labeled model with quantities and units when applicable.
- Reasoning that connects evidence with the mechanism rather than only repeats it.
- A specific method, boundary, scale, or alternative-explanation limit.
Session 4 · Water’s Properties: Density, Floating & Surface Effects · Model and explain
Water is unusual because its solid arrangement occupies more volume for the same mass than liquid water near freezing. That lower density helps ice stay at the surface. Do not generalize this behavior to every liquid or call ice empty. Surface tension concerns interactions at the liquid surface. A carefully placed tiny object may be supported there even when its material is denser than water. Disturbing the surface can change the result. This is not the full explanation of a ship.
Your task
For Water’s Properties: Density, Floating & Surface Effects, study Parts 3–4 and attempt the worked case: Calculate ice density and explain the hull’s displacement without claiming that every metal floats. Explain the steps before opening the model.
- Prepare (5 minutes): retrieve the relevant idea and state today’s question.
- Read/examine (10 minutes): use the linked unit, diagram, or supplied record; note units and conditions.
- Apply (15–25 minutes): complete the task, showing evidence and reasoning before opening guidance.
- Reflect (5 minutes): revise one choice, explain the correction, and save the work.
Hint and response guidance
Begin with the actual observation, quantity, or diagram relationship. Explain how it bears on the question before making a broad claim.
Ice density is 0.9 g/mL. The hull displaces 60 g of modeled water, consistent with buoyancy balancing its weight. A hollow hull can float because of its overall geometry and average density; a compact piece of the same material may behave differently. Neither result is a rule for every temperature or liquid.
- An accurate scientific claim answering the actual question.
- Relevant evidence or a labeled model with quantities and units when applicable.
- Reasoning that connects evidence with the mechanism rather than only repeats it.
- A specific method, boundary, scale, or alternative-explanation limit.
Session 5 · Water’s Properties: Density, Floating & Surface Effects · Practice, revise and exit
Use practice as evidence of understanding. A selected definition can be checked automatically, while a written explanation needs human comparison with its mechanism and limits.
Your task
For Water’s Properties: Density, Floating & Surface Effects, complete practice questions 1–6 and both choice checks, then answer independently: A learner says the largest object must sink first. What measurements would you ask for? Save a correction explaining one changed claim or method.
- Prepare (5 minutes): retrieve the relevant idea and state today’s question.
- Read/examine (10 minutes): use the linked unit, diagram, or supplied record; note units and conditions.
- Apply (15–25 minutes): complete the task, showing evidence and reasoning before opening guidance.
- Reflect (5 minutes): revise one choice, explain the correction, and save the work.
Hint and response guidance
Begin with the actual observation, quantity, or diagram relationship. Explain how it bears on the question before making a broad claim.
Ask for mass, volume or displacement, shape, enclosed air, and the liquid’s properties. Size alone does not determine average density or buoyancy.
- An accurate scientific claim answering the actual question.
- Relevant evidence or a labeled model with quantities and units when applicable.
- Reasoning that connects evidence with the mechanism rather than only repeats it.
- A specific method, boundary, scale, or alternative-explanation limit.
Submit this week
- For Water’s Properties: Density, Floating & Surface Effects, complete practice questions 1–6 and both choice checks, then answer independently: A learner says the largest object must sink first. What measurements would you ask for? Save a correction explaining one changed claim or method.
Parent / teacher weekly conference
Read aloud in short sections if needed and ask the learner to explain an observation before its cause. Compare written reasoning with the criteria and actual records, accepting supported alternatives. Keep learner answers and marks separately backed up. No personal disclosure, public posting, or product purchase is required.
- Can the learner state what was observed and what is inferred?
- Are units, time, scale, and boundary appropriate?
- Does the mechanism explain the evidence rather than merely label it?
- What specific distinction needs another example before proceeding?