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  1. Головна
  2. ›STUDY GUIDE
  3. ›UK, Cambridge, A Level та IB
  4. ›IB Diploma DP1
  5. ›Physics
  6. ›Theme B: Particulate nature of matter

IB Diploma DP1 / Physics / Curriculum

Theme B: Particulate nature of matter

Theme B: Particulate nature of matter: structured theory, worked examples, answered practice, and a mastery checklist for IB Diploma DP1.

Цілі навчання

  • ✓Describe “Thermal energy transfers” using evidence from observation, measurement, or a model.
  • ✓Describe “Temperature and internal energy” using evidence from observation, measurement, or a model.
  • ✓Describe “Gas laws” using evidence from observation, measurement, or a model.
  • ✓Describe “Thermodynamics in HL scope” using evidence from observation, measurement, or a model.
  • ✓Describe “Particle models” using evidence from observation, measurement, or a model.

Ключові ідеї та перевірки

  • I connect a model with experimental evidence.
  • I apply half-life or an energy relation correctly.
  • Every solution or explanation for “Theme B: Particulate nature of matter” should include a method, justification, and final check.

Розділ

Основна теорія

Ключові ідеї глави у зрозумілій послідовності перед практикою.

01

Model and experimental evidence

Modern physics uses models tested by spectra, scattering, decays, and detectors. Distinguish an observation from its interpretation.

02

Probability and scale

A single nuclear decay is random, but large samples follow predictable laws. Use half-life or an exponential relation with the correct scale.

03

Energy and conservation

In atomic and nuclear processes, check energy, momentum, charge, and particle numbers where applicable. Do not mix eV and J without conversion.

04

Thermal energy transfers

For “Thermal energy transfers”, 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.

05

Temperature and internal energy

For “Temperature and internal energy”, 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.

06

Gas laws

For “Gas laws”, 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.

07

Thermodynamics in HL scope

For “Thermodynamics in HL scope”, 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.

08

Particle models

For “Particle models”, 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

Розв'язані приклади

Дотримуйтесь методу крок за кроком і перевіряйте обґрунтування.

Worked half-life example

A sample starts with 640 active nuclei and 4 half-lives pass. How many are expected?

  1. 1The expected count halves each half-life.
  2. 2Use N = 640·(1/2)^4.
  3. 3This is a statistical expectation, not a prediction for each nucleus.

N = 40

Reasoning example

Before calculating, explain the key idea from “Thermal energy transfers” and which conditions must be checked.

  1. 1Define the idea in one clear sentence.
  2. 2Connect it to a representation, law, or formula.
  3. 3State a restriction, unit, or final check that makes the solution valid.

The answer should show not only which rule is used for “Thermal energy transfers”, but also why it is valid here.

Theme B: Particulate nature of matter

Практика з відповідями

Вісім завдань від базових навичок до екзаменаційного рівня. Спочатку виконайте самостійно.

Базова навичка4 хвилин

A sample starts with 144 nuclei. How many are expected after three half-lives?

Підказка

Halve three times.

Відповідь

18.

Базова навичка5 хвилин

Structure a solution for “Temperature and internal energy”: givens, SI units, law, substitution, and interpretation.

Підказка

State the law before substituting numbers.

Відповідь

A full solution states symbols/units, selects a valid law for “Temperature and internal energy”, shows substitution and calculation, and interprets the result.

Застосування6 хвилин

Identify three uncertainty sources in measuring “Gas laws” and improve each one.

Підказка

Consider instrument resolution, reaction time, repeats, and controls.

Відповідь

A full response links each specific error source to a targeted improvement and identifies random or systematic impact.

Застосування7 хвилин

Plan a suitable graph for “Thermodynamics in HL scope” data and explain how to obtain a gradient or relationship.

Підказка

Put the independent variable on x and dependent variable on y.

Відповідь

A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.

Обґрунтування8 хвилин

Check whether a result for “Particle models” is sensible using units, order of magnitude, and a limiting case.

Підказка

A check should not merely repeat the same calculation.

Відповідь

A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.

Обґрунтування9 хвилин

Connect “Thermal energy transfers” to energy conservation or a force/field model and justify the choice.

Підказка

Define the system and interactions.

Відповідь

A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.

Екзаменаційний10 хвилин

Write a multi-step exam response about “Temperature and internal energy” with calculation and evaluation.

Підказка

Separate givens, model, calculation, result, and evaluation.

Відповідь

A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.

Екзаменаційний12 хвилин

Compare two methods for investigating “Gas laws” and select the more reliable using criteria.

Підказка

Use accuracy, repeatability, control, and safety.

Відповідь

The choice must use at least three comparable criteria and acknowledge one trade-off or limitation.

Типові помилки

  • Treating half-life as a linear decrease.
  • Confusing radiation with radioactive material.
  • Using a model without connecting it to experimental evidence.

Перевірка розуміння

  • ✓I connect a model with experimental evidence.
  • ✓I apply half-life or an energy relation correctly.
  • ✓I check conservation, units, and order of magnitude.

Theme B: Particulate nature of matter

Домашня робота до розділу

Шість різних завдань від базового рівня до складного з часом, підказками та відповідями.

Базовий8 хвилин

Homework 1: A sample starts with 120 nuclei. How many are expected after three half-lives?

Підказка

Halve three times.

Відповідь

15.

Базовий10 хвилин

Homework 2: Structure a solution for “Temperature and internal energy”: givens, SI units, law, substitution, and interpretation.

Підказка

State the law before substituting numbers.

Відповідь

A full solution states symbols/units, selects a valid law for “Temperature and internal energy”, shows substitution and calculation, and interprets the result.

Поглиблений12 хвилин

Homework 3: Identify three uncertainty sources in measuring “Gas laws” and improve each one.

Підказка

Consider instrument resolution, reaction time, repeats, and controls.

Відповідь

A full response links each specific error source to a targeted improvement and identifies random or systematic impact.

Поглиблений15 хвилин

Homework 4: Plan a suitable graph for “Thermodynamics in HL scope” data and explain how to obtain a gradient or relationship.

Підказка

Put the independent variable on x and dependent variable on y.

Відповідь

A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.

Складний18 хвилин

Homework 5: Check whether a result for “Particle models” is sensible using units, order of magnitude, and a limiting case.

Підказка

A check should not merely repeat the same calculation.

Відповідь

A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.

Складний20 хвилин

Homework 6: Connect “Thermal energy transfers” to energy conservation or a force/field model and justify the choice.

Підказка

Define the system and interactions.

Відповідь

A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.

50 хвилин / 40 балів

Повний тест розділу

Повний тест із таймером, балами та зразками відповідей.

Таймер тесту

Готовий до запуску

Залишилося часу: 50:00

Start the timer when ready, work without notes, show every step, and open model answers only after finishing.

1. A sample starts with 72 nuclei. How many are expected after three half-lives?

2 балів
Відповідь

9.

2. Structure a solution for “Temperature and internal energy”: givens, SI units, law, substitution, and interpretation.

3 балів
Відповідь

A full solution states symbols/units, selects a valid law for “Temperature and internal energy”, shows substitution and calculation, and interprets the result.

3. Identify three uncertainty sources in measuring “Gas laws” and improve each one.

3 балів
Відповідь

A full response links each specific error source to a targeted improvement and identifies random or systematic impact.

4. Plan a suitable graph for “Thermodynamics in HL scope” data and explain how to obtain a gradient or relationship.

4 балів
Відповідь

A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.

5. Check whether a result for “Particle models” is sensible using units, order of magnitude, and a limiting case.

4 балів
Відповідь

A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.

6. Connect “Thermal energy transfers” to energy conservation or a force/field model and justify the choice.

4 балів
Відповідь

A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.

7. Write a multi-step exam response about “Temperature and internal energy” with calculation and evaluation.

5 балів
Відповідь

A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.

8. Compare two methods for investigating “Gas laws” and select the more reliable using criteria.

5 балів
Відповідь

The choice must use at least three comparable criteria and acknowledge one trade-off or limitation.

9. Create an extension question about “Thermodynamics in HL scope”, a prediction, and a data-collection plan.

5 балів
Відповідь

A full response gives a testable question, justified prediction, independent-variable range, repeats, and an analysis method.

10. A sample starts with 432 nuclei. How many are expected after three half-lives?

5 балів
Відповідь

54.

Розділ

Офіційні джерела

Джерела програми; порядок тем уточнюйте у школі та викладача.

UK Department for Education - ScienceOfficial national curriculum progression and attainment guidance.International Baccalaureate - DP curriculumOfficial DP subject structure and current subject briefs.

Physics

IB Diploma DP1: структурований маршрут з математики та фізики з розділами, практикою і наступними кроками.

Назад до предмета

Що покриває глава

Структура відповідає підручнику й допомагає організувати вивчення теми.

Thermal energy transfers
Temperature and internal energy
Gas laws
Thermodynamics in HL scope
Particle models

На чому сфокусуватися

Теми, де найчастіше виникають помилки або потрібна додаткова практика.

I connect a model with experimental evidence.
I apply half-life or an energy relation correctly.
I check conservation, units, and order of magnitude.

Джерела, щоденні матеріали та ресурси

З чого почати: підручник, daily material, PDFs, videos і worked examples.

Start from the official textbook or specification referenced on the subject page.
Use the notes and examples as support, not as a replacement for the official syllabus.
Check the current syllabus version before exam preparation.

Практика за підтемами

Цільова практика перед full tests, щоб coverage було зрозумілим.

A sample starts with 144 nuclei. How many are expected after three half-lives?
Structure a solution for “Temperature and internal energy”: givens, SI units, law, substitution, and interpretation.
Identify three uncertainty sources in measuring “Gas laws” and improve each one.
Plan a suitable graph for “Thermodynamics in HL scope” data and explain how to obtain a gradient or relationship.
Check whether a result for “Particle models” is sensible using units, order of magnitude, and a limiting case.
Connect “Thermal energy transfers” to energy conservation or a force/field model and justify the choice.
Write a multi-step exam response about “Temperature and internal energy” with calculation and evaluation.
Compare two methods for investigating “Gas laws” and select the more reliable using criteria.

Mocks і перевірка прогресу

Як вимірювати прогрес у главі і коли додавати її до загального mock.

Start with untimed practice by subtopic.
Move to a short timed checkpoint only after completing the mastery checklist.
Record each error with the correct method and revisit it after 48 hours.

Наступний крок

Що робити після глави і як вона пов'язана з наступним розділом.

Complete the practice without support.
Explain the core method aloud in under two minutes.
Continue to the next chapter or request targeted tutor support.

Примітка: офіційну екзаменаційну програму кожного року завжди уточнюйте у школі, викладача та за поточними офіційними джерелами.

Розділ 2 з 4

← Попередній розділTheme A: Space, time and motionНаступний розділ →Theme C: Wave behaviour
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