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  6. ›Μετρήσεις και φυσικά μεγέθη

Greek Lyceum Grade 1 / Physics / Curriculum

Μετρήσεις και φυσικά μεγέθη

Μετρήσεις και φυσικά μεγέθη: structured theory, worked examples, answered practice, and a mastery checklist for Greek Lyceum Grade 1.

CHAPTER PLAN

Learn, practise, and check your progress

Follow the steps in order or jump directly to the part you need.

—/5

completed

Estimated active study time

140 minutes

  1. 1. Understand

    Objectives, key ideas, and structured theory.

    Open →
  2. 2. Follow the method

    Worked examples that explain every step.

    Open →
  3. 3. Practise

    Graded tasks with hints and answer guidance.

    Open →
  4. 4. Consolidate

    Assignments from core work to challenge.

    Open →
  5. 5. Check

    A timed, marked test with solution guidance.

    Open →

Progress is stored only in this browser and does not require AI credits.

Learning objectives

  • ✓Describe “Θεμελιώδη και παράγωγα μεγέθη” using evidence from observation, measurement, or a model.
  • ✓Describe “SI μονάδες” using evidence from observation, measurement, or a model.
  • ✓Describe “Διαστάσεις φυσικών μεγεθών” using evidence from observation, measurement, or a model.
  • ✓Describe “Μετατροπές μονάδων” using evidence from observation, measurement, or a model.
  • ✓Describe “Πειραματικά δεδομένα” using evidence from observation, measurement, or a model.

Key ideas and checks

  • I design a safe experiment with controlled variables.
  • I record units, repeats, and uncertainty.
  • Every solution or explanation for “Μετρήσεις και φυσικά μεγέθη” should include a method, justification, and final check.

Unit

Core theory

The essential chapter ideas in a clear sequence before practice.

01

Quantity, unit, instrument

Every measurement identifies a physical quantity, numerical value, unit, and suitable instrument. A value without a unit is incomplete physical information.

02

Variables and a fair test

Change one independent variable, measure the dependent variable, and control the rest. Repeats improve reliability.

03

Graph and uncertainty

A graph reveals trends and allows slope or intercept analysis. Uncertainty and anomalous points should be discussed, not hidden.

04

Θεμελιώδη και παράγωγα μεγέθη

For “Θεμελιώδη και παράγωγα μεγέθη”, 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

SI μονάδες

For “SI μονάδες”, 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

Διαστάσεις φυσικών μεγεθών

For “Διαστάσεις φυσικών μεγεθών”, 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

Μετατροπές μονάδων

For “Μετατροπές μονάδων”, 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

Πειραματικά δεδομένα

For “Πειραματικά δεδομένα”, 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

Worked examples

Follow the method step by step and check why every step is valid.

Worked enquiry example

In a safe test about “Θεμελιώδη και παράγωγα μεγέθη”, the first condition gives 14 units and the second 11. Which is greater, and what should be kept the same?

  1. 1Compare the two measurements.
  2. 2State the changed factor and the conditions that must stay the same.
  3. 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 “Θεμελιώδη και παράγωγα μεγέθη” in your own words and use a picture, objects, a table, or a simple measurement to support it.

  1. 1State what is known and what is being found.
  2. 2Choose one clear representation.
  3. 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.

Μετρήσεις και φυσικά μεγέθη

Practice with answers

Eight graded tasks from core fluency to exam-style application. Work independently before opening a hint or answer.

Core fluency3 minutes

Record 9 safe observations about “Θεμελιώδη και παράγωγα μεγέθη” without writing a conclusion yet.

Hint

An observation is something seen, heard, or measured.

Answer guide

The response needs 9 specific observable or measurable statements, not guesses about cause.

Core fluency4 minutes

Design a fair test for “SI μονάδες”: what changes, what is measured, and which 2 things stay the same?

Hint

Change one factor only.

Answer guide

Full response: one changed factor, one measurable outcome, and 2 controlled conditions.

Application4 minutes

Measurements are 8, 4, and 12 units. Put them in a table, find the greatest, and the difference from the least.

Hint

Use condition and measurement headings.

Answer guide

Greatest 12, least 4, difference 8 units.

Application5 minutes

Sort examples of “Μετατροπές μονάδων” into two groups and state the sorting rule.

Hint

Each item should clearly match one group.

Answer guide

A full response gives two named groups, at least two examples in each, and an observable sorting rule.

Reasoning5 minutes

Choose a suitable tool and unit to measure something connected with “Πειραματικά δεδομένα”.

Hint

Decide whether you measure length, time, mass, temperature, or volume.

Answer guide

The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.

Reasoning6 minutes

From data 3, 8, 13, predict the next value and explain the pattern.

Hint

Look for the constant change +5.

Answer guide

18; +5.

Exam style7 minutes

Write 2 safety rules for a simple activity about “Μονόμετρα και διανυσματικά μεγέθη” and explain the risk each reduces.

Hint

Link each rule to a reason.

Answer guide

A full response gives 2 specific rules, each linked to a risk, and requires supervision where appropriate.

Exam style8 minutes

Data A=9 and B=13. Write a conclusion, evidence, and one limitation about “Συνιστώσες διανυσμάτων”.

Hint

Do not claim more than the two values show.

Answer guide

B is 4 greater than A. The values support this, but two measurements alone do not prove a general rule.

Common mistakes

  • Changing more than one variable at once.
  • Claiming precision without relating it to the instrument.
  • Using incorrect axes, units, or best-fit line.

Mastery check

  • ✓I design a safe experiment with controlled variables.
  • ✓I record units, repeats, and uncertainty.
  • ✓I analyse a graph and evaluate the model.

Μετρήσεις και φυσικά μεγέθη

Chapter homework

Six distinct assignments from core fluency to challenge, each with an estimated time, hint, and answer guide.

Core5 minutes

Homework 1: Record 5 safe observations about “Θεμελιώδη και παράγωγα μεγέθη” without writing a conclusion yet.

Hint

An observation is something seen, heard, or measured.

Answer guide

The response needs 5 specific observable or measurable statements, not guesses about cause.

Core6 minutes

Homework 2: Design a fair test for “SI μονάδες”: what changes, what is measured, and which 3 things stay the same?

Hint

Change one factor only.

Answer guide

Full response: one changed factor, one measurable outcome, and 3 controlled conditions.

Stretch7 minutes

Homework 3: Measurements are 4, 5, and 9 units. Put them in a table, find the greatest, and the difference from the least.

Hint

Use condition and measurement headings.

Answer guide

Greatest 9, least 4, difference 5 units.

Stretch8 minutes

Homework 4: Sort examples of “Μετατροπές μονάδων” into two groups and state the sorting rule.

Hint

Each item should clearly match one group.

Answer guide

A full response gives two named groups, at least two examples in each, and an observable sorting rule.

Challenge10 minutes

Homework 5: Choose a suitable tool and unit to measure something connected with “Πειραματικά δεδομένα”.

Hint

Decide whether you measure length, time, mass, temperature, or volume.

Answer guide

The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.

Challenge12 minutes

Homework 6: From data 6, 12, 18, predict the next value and explain the pattern.

Hint

Look for the constant change +6.

Answer guide

24; +6.

35 minutes / 30 marks

Full chapter test

A timed, full-mark self-assessment with model-answer guidance.

Test timer

Ready to start

Time remaining: 35:00

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

1. Record 3 safe observations about “Θεμελιώδη και παράγωγα μεγέθη” without writing a conclusion yet.

2 marks
Answer guide

The response needs 3 specific observable or measurable statements, not guesses about cause.

2. Design a fair test for “SI μονάδες”: what changes, what is measured, and which 3 things stay the same?

3 marks
Answer guide

Full response: one changed factor, one measurable outcome, and 3 controlled conditions.

3. Measurements are 9, 5, and 14 units. Put them in a table, find the greatest, and the difference from the least.

3 marks
Answer guide

Greatest 14, least 5, difference 9 units.

4. Sort examples of “Μετατροπές μονάδων” into two groups and state the sorting rule.

4 marks
Answer guide

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 “Πειραματικά δεδομένα”.

4 marks
Answer guide

The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.

6. From data 4, 10, 16, predict the next value and explain the pattern.

4 marks
Answer guide

22; +6.

7. Write 3 safety rules for a simple activity about “Μονόμετρα και διανυσματικά μεγέθη” and explain the risk each reduces.

5 marks
Answer guide

A full response gives 3 specific rules, each linked to a risk, and requires supervision where appropriate.

8. Data A=3 and B=8. Write a conclusion, evidence, and one limitation about “Συνιστώσες διανυσμάτων”.

5 marks
Answer guide

B is 5 greater than A. The values support this, but two measurements alone do not prove a general rule.

Unit

Official sources and verification

Curriculum reference sources. Always confirm the teaching sequence with the school and tutor.

Ινστιτούτο Εκπαιδευτικής Πολιτικής (ΙΕΠ)Official curriculum programmes and announcements.Ψηφιακό Σχολείο / Διαδραστικά Σχολικά ΒιβλίαOfficial school textbooks and available digital material.

Physics

Learn force diagrams, axis choice, units, and the transition from physical picture to equation.

Back to subject

What this chapter covers

The structure follows the official textbook layout and is used to organise study.

Θεμελιώδη και παράγωγα μεγέθη
SI μονάδες
Διαστάσεις φυσικών μεγεθών
Μετατροπές μονάδων
Πειραματικά δεδομένα
Γραφικές παραστάσεις
Μονόμετρα και διανυσματικά μεγέθη
Συνιστώσες διανυσμάτων
Ρυθμός μεταβολής

Where to focus

The areas that usually create mistakes or need extra revision.

I design a safe experiment with controlled variables.
I record units, repeats, and uncertainty.
I analyse a graph and evaluate the model.

Sources, daily material, and resources

Where to start: textbook, daily material, PDFs, videos, and 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.

Practice by subtopic

Targeted practice before full tests so coverage is clear.

Record 9 safe observations about “Θεμελιώδη και παράγωγα μεγέθη” without writing a conclusion yet.
Design a fair test for “SI μονάδες”: what changes, what is measured, and which 2 things stay the same?
Measurements are 8, 4, and 12 units. Put them in a table, find the greatest, and the difference from the least.
Sort examples of “Μετατροπές μονάδων” into two groups and state the sorting rule.
Choose a suitable tool and unit to measure something connected with “Πειραματικά δεδομένα”.
From data 3, 8, 13, predict the next value and explain the pattern.
Write 2 safety rules for a simple activity about “Μονόμετρα και διανυσματικά μεγέθη” and explain the risk each reduces.
Data A=9 and B=13. Write a conclusion, evidence, and one limitation about “Συνιστώσες διανυσμάτων”.

Mocks and progress checks

How to measure progress in this chapter and when it enters a cumulative 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.

Next step

What to do after finishing the chapter and how it connects to the next unit.

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

Note: for the official examinable syllabus of each school year, always confirm with the school, tutor, and current Ministry/IEP announcements.

Chapter 1 of 4

Next chapter →Ευθύγραμμη κίνηση
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