Temperature Scales and Conversions

Grade 10 · Physics

Semester 2 | Period 4 | Week 20

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Subject: Physics

Semester: 2

Period: 4

Week: 20

School Name:

Teacher’s Name:

Subject: Physics

Grade Level: Grade 10

Week & Period: Week 20, Period IV

Date:

Sub-topic: Temperature Scales and Conversions

Learning Objectives: By the end of the lesson, learners should be able to:

  1. List different temperature scales.
  2. Convert values between Celsius, Kelvin, and Fahrenheit.
  3. Explain the importance of each scale.

Instructional Materials:

  • Conversion tables
  • Thermometers with different scales (Celsius, Fahrenheit, Kelvin)
  • Ice and boiling water setup
  • Worksheet with practice problems

Anticipation (Warm-Up): Ask: “Why do some countries use Fahrenheit while others use Celsius? Which do you think is more accurate or useful?”

Building Knowledge:

  1. Common Temperature Scales:
    • Celsius (°C): Based on water's freezing (0°C) and boiling point (100°C)
    • Kelvin (K): SI unit of temperature; absolute zero (0 K) is the lowest possible temperature.
    • Fahrenheit (°F): Common in the U.S.; water freezes at 32°F and boils at 212°F
  2. Conversion Formulas:
    • Celsius to Kelvin:
    • Celsius to Fahrenheit:
    • Fahrenheit to Celsius:

Solved Examples:

  1. Convert 25°C to Kelvin and Fahrenheit:
  2. Convert 100°F to Celsius and Kelvin:

Activities:

  • Students complete a conversion table for 10 common temperatures in all three units.
  • Measure water temperatures and convert the readings between °C, °F, and K.
  • Group competition on solving conversion challenges.

Assessment:

  1. Convert the following: i. 30°C to Kelvin and Fahrenheit.
    50°F to °C and K.
    iii. 300 K to °C and °F.
  2. State the freezing and boiling points of water in °C, °F, and K.

Homework:

  • Record your body temperature and convert it into all 3 scales.
  • Create a temperature conversion chart showing 0°C to 100°C in 10°C intervals and their equivalents in °F and K.

Expanded Notes:

  • Temperature conversions are important in scientific, medical, engineering, and everyday contexts.
  • The Kelvin scale starts at absolute zero, where molecular motion theoretically stops.
  • The Fahrenheit scale is less common globally but still used in weather forecasts and kitchen thermometers in the U.S.

Differentiation:

  • Provide conversion formula cards for learners with memory challenges.
  • Pair learners to work through example problems step-by-step.
  • Use thermometer images labeled in different scales for recognition exercises.

Teacher’s Reflection:

  • Were learners able to use conversion formulas accurately?
  • Did they recognize practical uses for different temperature scales?
  • Should more real-life application scenarios be added for clarity?