Class 7 Physics Lesson Plan - Chapter 5: Heat

Class 7 Physics Lesson Plan

Chapter 5: Heat

Subtopics

  • Heat – A Form of Energy and its Units (Calorie (cal) and Joule (J))
  • Different Units of Temperature (°C, °F, K)
  • Effects of Heat
  • Methods of Heat Transfer (Conduction, Convection, Radiation)
  • Thermos Flask (Application of Heat Transfer)
  • Appearance of the Colour of an Object (Based on Absorption and Reflection)

Learning Objectives

  • Understand heat as a form of energy and its measurement in different units.
  • Differentiate between °C, °F, and Kelvin temperature scales.
  • Analyze the effects of heat on materials and living beings.
  • Explain the three methods of heat transfer and their applications.
  • Describe how a thermos flask minimizes heat transfer.
  • Understand how heat affects the appearance of object colors based on absorption and reflection.

Procedure

  • Introduce heat as a form of energy with real-life examples.
  • Explain the units of heat (calorie and joule) and temperature scales with conversions.
  • Discuss the effects of heat, such as expansion, change of state, and temperature rise.
  • Demonstrate conduction, convection, and radiation using simple experiments.
  • Show how a thermos flask prevents heat loss using insulation principles.
  • Explain how objects appear in different colors based on heat absorption and reflection.

Activities

  • Experiment: Measure the temperature of water before and after heating.
  • Practical: Demonstrate heat transfer using a metal rod, hot air balloon, and infrared lamp.
  • Discussion: Observe why black objects heat up faster than white ones.
  • Observation: Compare the working of a thermos flask and an open container.

Skill/Values

  • Scientific observation and reasoning.
  • Analytical thinking and problem-solving.
  • Application of physics in daily life.
  • Understanding of energy conservation and heat management.

Assessment

  • Class discussion and Q&A sessions.
  • Worksheet on heat transfer methods and temperature conversions.
  • Practical experiment reports.
  • Quiz on effects of heat and applications in daily life.