Greek Primary Grade 4 / Primary Science / Physics foundations / Δυνάμεις και απλές μηχανές
Μοχλοί, τροχαλίες και κεκλιμένο επίπεδο: structured theory, worked examples, answered practice, and a mastery checklist for Greek Primary Grade 4.
Раздел
Ключевые идеи главы в понятной последовательности перед практикой.
Choose the body or system, define a positive direction, and mark every force or motion quantity before writing an equation.
A free-body or motion diagram comes before the law. Use resultant force to connect interaction and acceleration.
Vector quantities depend on direction. Keep signs consistent and check that the final unit matches the requested quantity.
For “μηχανικό πλεονέκτημα ως ιδέα”, 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 “έργο”, 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 “καθημερινές εφαρμογές”, 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
Следуйте методу шаг за шагом и проверяйте обоснование каждого шага.
In a safe test about “μηχανικό πλεονέκτημα ως ιδέα”, the first condition gives 9 units and the second 6. Which is greater, and what should be kept the same?
The first value is greater by 3 units. A fair test changes only one factor.
Explain “μηχανικό πλεονέκτημα ως ιδέα” in your own words and use a picture, objects, a table, or a simple measurement to support it.
A complete explanation connects the correct idea, a clear representation, and a sensible check.
Μοχλοί, τροχαλίες και κεκλιμένο επίπεδο
Восемь заданий от базовых навыков до экзаменационного уровня. Сначала решите самостоятельно.
Record 4 safe observations about “μηχανικό πλεονέκτημα ως ιδέα” without writing a conclusion yet.
An observation is something seen, heard, or measured.
The response needs 4 specific observable or measurable statements, not guesses about cause.
Design a fair test for “έργο”: what changes, what is measured, and which 6 things stay the same?
Change one factor only.
Full response: one changed factor, one measurable outcome, and 6 controlled conditions.
Measurements are 3, 3, and 6 units. Put them in a table, find the greatest, and the difference from the least.
Use condition and measurement headings.
Greatest 6, least 3, difference 3 units.
Sort examples of “μηχανικό πλεονέκτημα ως ιδέα” into two groups and state the sorting rule.
Each item should clearly match one group.
A full response gives two named groups, at least two examples in each, and an observable sorting rule.
Choose a suitable tool and unit to measure something connected with “έργο”.
Decide whether you measure length, time, mass, temperature, or volume.
The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.
From data 5, 9, 13, predict the next value and explain the pattern.
Look for the constant change +4.
17; +4.
Write 6 safety rules for a simple activity about “μηχανικό πλεονέκτημα ως ιδέα” and explain the risk each reduces.
Link each rule to a reason.
A full response gives 6 specific rules, each linked to a risk, and requires supervision where appropriate.
Data A=4 and B=7. Write a conclusion, evidence, and one limitation about “έργο”.
Do not claim more than the two values show.
B is 3 greater than A. The values support this, but two measurements alone do not prove a general rule.
Μοχλοί, τροχαλίες και κεκλιμένο επίπεδο
Шесть разных заданий от базового уровня до сложного с временем, подсказками и ответами.
Homework 1: Record 7 safe observations about “μηχανικό πλεονέκτημα ως ιδέα” without writing a conclusion yet.
An observation is something seen, heard, or measured.
The response needs 7 specific observable or measurable statements, not guesses about cause.
Homework 2: Design a fair test for “έργο”: what changes, what is measured, and which 2 things stay the same?
Change one factor only.
Full response: one changed factor, one measurable outcome, and 2 controlled conditions.
Homework 3: Measurements are 6, 4, and 10 units. Put them in a table, find the greatest, and the difference from the least.
Use condition and measurement headings.
Greatest 10, least 4, difference 6 units.
Homework 4: Sort examples of “μηχανικό πλεονέκτημα ως ιδέα” into two groups and state the sorting rule.
Each item should clearly match one group.
A full response gives two named groups, at least two examples in each, and an observable sorting rule.
Homework 5: Choose a suitable tool and unit to measure something connected with “έργο”.
Decide whether you measure length, time, mass, temperature, or volume.
The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.
Homework 6: From data 8, 13, 18, predict the next value and explain the pattern.
Look for the constant change +5.
23; +5.
35 минут / 30 баллов
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 5 safe observations about “μηχανικό πλεονέκτημα ως ιδέα” without writing a conclusion yet.
2 балловThe response needs 5 specific observable or measurable statements, not guesses about cause.
2. Design a fair test for “έργο”: what changes, what is measured, and which 2 things stay the same?
3 балловFull response: one changed factor, one measurable outcome, and 2 controlled conditions.
3. Measurements are 4, 4, and 8 units. Put them in a table, find the greatest, and the difference from the least.
3 балловGreatest 8, least 4, difference 4 units.
4. Sort examples of “μηχανικό πλεονέκτημα ως ιδέα” into two groups and state the sorting rule.
4 балловA 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 “έργο”.
4 балловThe quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.
6. From data 6, 11, 16, predict the next value and explain the pattern.
4 баллов21; +5.
7. Write 2 safety rules for a simple activity about “μηχανικό πλεονέκτημα ως ιδέα” and explain the risk each reduces.
5 балловA full response gives 2 specific rules, each linked to a risk, and requires supervision where appropriate.
8. Data A=5 and B=9. Write a conclusion, evidence, and one limitation about “έργο”.
5 балловB is 4 greater than A. The values support this, but two measurements alone do not prove a general rule.
Раздел
Источники программы; порядок тем уточняйте в школе и у преподавателя.
Primary Science / Physics foundations
Greek Primary Grade 4: структурированный маршрут по математике и физике с главами, практикой и следующими шагами.
Структура следует учебнику и помогает организовать изучение темы.
Темы, где чаще возникают ошибки или нужна дополнительная практика.
С чего начать: учебник, daily material, PDFs, videos и worked examples.
Целевая практика перед full tests, чтобы coverage было понятным.
Как измерять прогресс по главе и когда включать ее в общий mock.
Что делать после главы и как она связана со следующим разделом.
Примечание: официальную экзаменационную программу каждого года всегда уточняйте в школе, у преподавателя и по текущим официальным источникам.
