Learning Objectives

• Understand the concept of physical quantities and their importance in science.
• Identify and classify physical quantities into fundamental and derived quantities.
• Explain the International System of Units (SI units).
• Solve basic problems involving unit conversions.

Key Terms

Glossary

• Physical Quantity:
  A property of a material or system that can be quantified through measurement.
  
  (Физикалық шама)

  Физикалық шама — өлшеу арқылы сандық түрде анықталатын қасиет.

• Fundamental Quantity:
  A physical quantity that cannot be expressed in terms of other quantities.
  
  (Негізгі шама)

  Негізгі шама — басқа шамалар арқылы өрнектелмейтін физикалық шама.

• Derived Quantity:
  A physical quantity derived from fundamental quantities.
  
  (Туынды шама)

  Туынды шама — негізгі шамалардан алынатын физикалық шама.

• Unit:
  A standard for expressing the measurement of a quantity.
  
  (Өлшем бірлік)

  Өлшем бірлік — шаманы өлшеудің стандартты түрі.

• Measurement:
  The process of quantifying a physical quantity.
  
  (Өлшеу)

  Өлшеу — физикалық шаманы сандық тұрғыда анықтау процесі.

• Conversion:
  The process of changing a quantity from one unit to another.
  
  (Айырбастау)

  Айырбастау — шаманы бір өлшем бірлігінен екіншіге ауыстыру процесі.

Exercises for Terminology Memorization

Practice the key terms and definitions using the following resources:

• Quizlet Flashcards
• Interactive Matching Game

Video: Physical Quantities and Units

Practice Exercises with Answers

Use the embedded practice tool below:

Research Task

Use the following simulator to explore unit conversions:

Unit Conversion Simulator

Task:

• Convert 25 liters to milliliters.
• Convert 1.5 hours to seconds.

Answers:

• 25 liters = 25,000 milliliters
• 1.5 hours = 5400 seconds

Reflection

Reflect on today’s lesson by answering the following questions:

• What are the main differences between fundamental and derived quantities?
• How will understanding units help you in everyday life and future studies?
• Which part of the lesson was most challenging, and why?

Write your answers in your journal or discuss with your peers.