Цели обучения
- Describe “surface” using evidence from observation, measurement, or a model.
- Describe “movement” using evidence from observation, measurement, or a model.
- Describe “measurement” using evidence from observation, measurement, or a model.
Year 3 / Primary Science / Physics foundations / Forces and magnets
Contact forces and friction
Contact forces and friction: structured theory, worked examples, answered practice, and a mastery checklist for Year 3.
Ключевые идеи и проверки
- I design a safe experiment with controlled variables.
- I record units, repeats, and uncertainty.
- Every solution or explanation for “Contact forces and friction” should include a method, justification, and final check.
Раздел
Основная теория
Ключевые идеи главы в понятной последовательности перед практикой.
Quantity, unit, instrument
Every measurement identifies a physical quantity, numerical value, unit, and suitable instrument. A value without a unit is incomplete physical information.
Variables and a fair test
Change one independent variable, measure the dependent variable, and control the rest. Repeats improve reliability.
Graph and uncertainty
A graph reveals trends and allows slope or intercept analysis. Uncertainty and anomalous points should be discussed, not hidden.
surface
For “surface”, 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.
movement
For “movement”, 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.
measurement
For “measurement”, 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.
Primary Science / Physics foundations
Разобранные примеры
Следуйте методу шаг за шагом и проверяйте обоснование каждого шага.
Worked enquiry example
In a safe test about “surface”, the first condition gives 10 units and the second 7. Which is greater, and what should be kept the same?
- 1Compare the two measurements.
- 2State the changed factor and the conditions that must stay the same.
- 3Write a conclusion supported only by the data.
The first value is greater by 3 units. A fair test changes only one factor.
Thinking and explanation example
Explain “surface” in your own words and use a picture, objects, a table, or a simple measurement to support it.
- 1State what is known and what is being found.
- 2Choose one clear representation.
- 3Explain what it shows and check that the answer is sensible.
A complete explanation connects the correct idea, a clear representation, and a sensible check.
Contact forces and friction
Практика с ответами
Восемь заданий от базовых навыков до экзаменационного уровня. Сначала решите самостоятельно.
Базовый навык3 минут
Record 5 safe observations about “surface” without writing a conclusion yet.
Подсказка
An observation is something seen, heard, or measured.
Ответ
The response needs 5 specific observable or measurable statements, not guesses about cause.
Базовый навык4 минут
Design a fair test for “movement”: what changes, what is measured, and which 5 things stay the same?
Подсказка
Change one factor only.
Ответ
Full response: one changed factor, one measurable outcome, and 5 controlled conditions.
Применение4 минут
Measurements are 4, 2, and 6 units. Put them in a table, find the greatest, and the difference from the least.
Подсказка
Use condition and measurement headings.
Ответ
Greatest 6, least 2, difference 4 units.
Применение5 минут
Sort examples of “surface” into two groups and state the sorting rule.
Подсказка
Each item should clearly match one group.
Ответ
A full response gives two named groups, at least two examples in each, and an observable sorting rule.
Обоснование5 минут
Choose a suitable tool and unit to measure something connected with “movement”.
Подсказка
Decide whether you measure length, time, mass, temperature, or volume.
Ответ
The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.
Обоснование6 минут
From data 6, 9, 12, predict the next value and explain the pattern.
Подсказка
Look for the constant change +3.
Ответ
15; +3.
Экзаменационный7 минут
Write 5 safety rules for a simple activity about “surface” and explain the risk each reduces.
Подсказка
Link each rule to a reason.
Ответ
A full response gives 5 specific rules, each linked to a risk, and requires supervision where appropriate.
Экзаменационный8 минут
Data A=5 and B=7. Write a conclusion, evidence, and one limitation about “movement”.
Подсказка
Do not claim more than the two values show.
Ответ
B is 2 greater than A. The values support this, but two measurements alone do not prove a general rule.
Частые ошибки
- Changing more than one variable at once.
- Claiming precision without relating it to the instrument.
- Using incorrect axes, units, or best-fit line.
Проверка понимания
- I design a safe experiment with controlled variables.
- I record units, repeats, and uncertainty.
- I analyse a graph and evaluate the model.
Contact forces and friction
Домашняя работа по главе
Шесть разных заданий от базового уровня до сложного с временем, подсказками и ответами.
Базовый5 минут
Homework 1: Record 8 safe observations about “surface” without writing a conclusion yet.
Подсказка
An observation is something seen, heard, or measured.
Ответ
The response needs 8 specific observable or measurable statements, not guesses about cause.
Базовый6 минут
Homework 2: Design a fair test for “movement”: what changes, what is measured, and which 6 things stay the same?
Подсказка
Change one factor only.
Ответ
Full response: one changed factor, one measurable outcome, and 6 controlled conditions.
Углубленный7 минут
Homework 3: Measurements are 7, 3, and 10 units. Put them in a table, find the greatest, and the difference from the least.
Подсказка
Use condition and measurement headings.
Ответ
Greatest 10, least 3, difference 7 units.
Углубленный8 минут
Homework 4: Sort examples of “surface” into two groups and state the sorting rule.
Подсказка
Each item should clearly match one group.
Ответ
A full response gives two named groups, at least two examples in each, and an observable sorting rule.
Сложный10 минут
Homework 5: Choose a suitable tool and unit to measure something connected with “movement”.
Подсказка
Decide whether you measure length, time, mass, temperature, or volume.
Ответ
The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.
Сложный12 минут
Homework 6: From data 9, 13, 17, predict the next value and explain the pattern.
Подсказка
Look for the constant change +4.
Ответ
21; +4.
35 минут / 30 баллов
Полный тест по главе
Полный тест с таймером, баллами и образцами ответов.
Start the timer when ready, work without notes, show every step, and open model answers only after finishing.
1. Record 6 safe observations about “surface” without writing a conclusion yet.
2 балловОтвет
The response needs 6 specific observable or measurable statements, not guesses about cause.
2. Design a fair test for “movement”: what changes, what is measured, and which 6 things stay the same?
3 балловОтвет
Full response: one changed factor, one measurable outcome, and 6 controlled conditions.
3. Measurements are 5, 3, and 8 units. Put them in a table, find the greatest, and the difference from the least.
3 балловОтвет
Greatest 8, least 3, difference 5 units.
4. Sort examples of “surface” into two groups and state the sorting rule.
4 балловОтвет
A full response gives two named groups, at least two examples in each, and an observable sorting rule.
5. Choose a suitable tool and unit to measure something connected with “movement”.
4 балловОтвет
The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.
6. From data 7, 11, 15, predict the next value and explain the pattern.
4 балловОтвет
19; +4.
7. Write 6 safety rules for a simple activity about “surface” and explain the risk each reduces.
5 балловОтвет
A full response gives 6 specific rules, each linked to a risk, and requires supervision where appropriate.
8. Data A=6 and B=9. Write a conclusion, evidence, and one limitation about “movement”.
5 балловОтвет
B is 3 greater than A. The values support this, but two measurements alone do not prove a general rule.
Раздел
Официальные источники
Источники программы; порядок тем уточняйте в школе и у преподавателя.
Primary Science / Physics foundations
Year 3: структурированный маршрут по математике и физике с главами, практикой и следующими шагами.
Что покрывает глава
Структура следует учебнику и помогает организовать изучение темы.
surface
movement
measurement
Где сфокусироваться
Темы, где чаще возникают ошибки или нужна дополнительная практика.
I design a safe experiment with controlled variables.
I record units, repeats, and uncertainty.
I analyse a graph and evaluate the model.
Источники, ежедневные материалы и ресурсы
С чего начать: учебник, daily material, PDFs, videos и 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 по подтемам
Целевая практика перед full tests, чтобы coverage было понятным.
Record 5 safe observations about “surface” without writing a conclusion yet.
Design a fair test for “movement”: what changes, what is measured, and which 5 things stay the same?
Measurements are 4, 2, and 6 units. Put them in a table, find the greatest, and the difference from the least.
Sort examples of “surface” into two groups and state the sorting rule.
Choose a suitable tool and unit to measure something connected with “movement”.
From data 6, 9, 12, predict the next value and explain the pattern.
Write 5 safety rules for a simple activity about “surface” and explain the risk each reduces.
Data A=5 and B=7. Write a conclusion, evidence, and one limitation about “movement”.
Mocks и проверка прогресса
Как измерять прогресс по главе и когда включать ее в общий 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.
Следующий шаг
Что делать после главы и как она связана со следующим разделом.
Complete the practice without support.
Explain the core method aloud in under two minutes.
Continue to the next chapter or request targeted tutor support.
Примечание: официальную экзаменационную программу каждого года всегда уточняйте в школе, у преподавателя и по текущим официальным источникам.