KS3 Year 9 / Physics / Curriculum
Energy: structured theory, worked examples, answered practice, and a mastery checklist for KS3 Year 9.
Розділ
Ключові ідеї глави у зрозумілій послідовності перед практикою.
Define the system and identify how energy or momentum is transferred. Conservation applies to the correct system and time interval.
Write initial and final quantities before substituting numbers. This exposes losses, external work, and direction.
Energy describes an amount, while power describes its transfer rate. Do not compare systems using work alone when time matters.
For “Energy conservation”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Power”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Efficiency”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Work done”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Energy resources”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
Physics
Дотримуйтесь методу крок за кроком і перевіряйте обґрунтування.
A 4 kg body moves at 6 m/s. Find its kinetic energy and momentum.
Ek = 72 J, p = 24 kg·m/s
Before calculating, explain the key idea from “Energy conservation” and which conditions must be checked.
The answer should show not only which rule is used for “Energy conservation”, but also why it is valid here.
Energy
Вісім завдань від базових навичок до екзаменаційного рівня. Спочатку виконайте самостійно.
A 9 kg mass moves at 5 m/s. Find kinetic energy.
Ek=1/2 mv².
Ek=112.5 J.
A machine transfers 1000 J in 10 s. Find power.
P=E/t.
P=100 W.
Structure a solution for “Efficiency”: givens, SI units, law, substitution, and interpretation.
State the law before substituting numbers.
A full solution states symbols/units, selects a valid law for “Efficiency”, shows substitution and calculation, and interprets the result.
Identify three uncertainty sources in measuring “Work done” and improve each one.
Consider instrument resolution, reaction time, repeats, and controls.
A full response links each specific error source to a targeted improvement and identifies random or systematic impact.
Plan a suitable graph for “Energy resources” data and explain how to obtain a gradient or relationship.
Put the independent variable on x and dependent variable on y.
A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.
Check whether a result for “Sankey diagrams introduction” is sensible using units, order of magnitude, and a limiting case.
A check should not merely repeat the same calculation.
A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.
Connect “Energy stores and pathways” to energy conservation or a force/field model and justify the choice.
Define the system and interactions.
A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.
Write a multi-step exam response about “Energy conservation” with calculation and evaluation.
Separate givens, model, calculation, result, and evaluation.
A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.
Energy
Шість різних завдань від базового рівня до складного з часом, підказками та відповідями.
Homework 1: A 5 kg mass moves at 6 m/s. Find kinetic energy.
Ek=1/2 mv².
Ek=90 J.
Homework 2: A machine transfers 2400 J in 15 s. Find power.
P=E/t.
P=160 W.
Homework 3: Structure a solution for “Efficiency”: givens, SI units, law, substitution, and interpretation.
State the law before substituting numbers.
A full solution states symbols/units, selects a valid law for “Efficiency”, shows substitution and calculation, and interprets the result.
Homework 4: Identify three uncertainty sources in measuring “Work done” and improve each one.
Consider instrument resolution, reaction time, repeats, and controls.
A full response links each specific error source to a targeted improvement and identifies random or systematic impact.
Homework 5: Plan a suitable graph for “Energy resources” data and explain how to obtain a gradient or relationship.
Put the independent variable on x and dependent variable on y.
A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.
Homework 6: Check whether a result for “Sankey diagrams introduction” is sensible using units, order of magnitude, and a limiting case.
A check should not merely repeat the same calculation.
A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.
50 хвилин / 40 балів
Повний тест із таймером, балами та зразками відповідей.
Start the timer when ready, work without notes, show every step, and open model answers only after finishing.
1. A 3 kg mass moves at 6 m/s. Find kinetic energy.
2 балівEk=54 J.
2. A machine transfers 1800 J in 15 s. Find power.
3 балівP=120 W.
3. Structure a solution for “Efficiency”: givens, SI units, law, substitution, and interpretation.
3 балівA full solution states symbols/units, selects a valid law for “Efficiency”, shows substitution and calculation, and interprets the result.
4. Identify three uncertainty sources in measuring “Work done” and improve each one.
4 балівA full response links each specific error source to a targeted improvement and identifies random or systematic impact.
5. Plan a suitable graph for “Energy resources” data and explain how to obtain a gradient or relationship.
4 балівA full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.
6. Check whether a result for “Sankey diagrams introduction” is sensible using units, order of magnitude, and a limiting case.
4 балівA full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.
7. Connect “Energy stores and pathways” to energy conservation or a force/field model and justify the choice.
5 балівA full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.
8. Write a multi-step exam response about “Energy conservation” with calculation and evaluation.
5 балівA full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.
9. Compare two methods for investigating “Power” and select the more reliable using criteria.
5 балівThe choice must use at least three comparable criteria and acknowledge one trade-off or limitation.
10. Create an extension question about “Efficiency”, a prediction, and a data-collection plan.
5 балівA full response gives a testable question, justified prediction, independent-variable range, repeats, and an analysis method.
Розділ
Джерела програми; порядок тем уточнюйте у школі та викладача.
Physics
KS3 Year 9: структурований маршрут з математики та фізики з розділами, практикою і наступними кроками.
Структура відповідає підручнику й допомагає організувати вивчення теми.
Теми, де найчастіше виникають помилки або потрібна додаткова практика.
З чого почати: підручник, daily material, PDFs, videos і worked examples.
Цільова практика перед full tests, щоб coverage було зрозумілим.
Як вимірювати прогрес у главі і коли додавати її до загального mock.
Що робити після глави і як вона пов'язана з наступним розділом.
Примітка: офіційну екзаменаційну програму кожного року завжди уточнюйте у школі, викладача та за поточними офіційними джерелами.
