Thermal Energy Transfer

Alberta Curriculum Connections

Science 7, Energy and Matter: Heat and Temperature

• Describe thermal energy and its effects on matter through observations and experiments
• Compare heat transfer by conduction, convection, and radiation in solids, liquids, and gases
• Use models and data to explain heat transfer mechanisms

Specific Learning Outcome:
7-4-02 Describe thermal energy and explain transfer by conduction, convection, and radiation

Lesson Overview

Duration: 61 minutes
Class size: 30 students
Topic: Thermal Energy Transfer – Focus on Radiation
Big Idea: Heat transfers in different ways; radiation allows heat transfer without direct contact.

Learning Outcomes - "I Can" Statements

By the end of this lesson, students will be able to:

• I can distinguish between heat and temperature.
• I can explain that heat is energy in motion.
• I can describe how heat transfers by radiation.
• I can give three real-world examples of heat transfer by radiation.

Success Criteria

Students will demonstrate success when they:

• Correctly explain the difference between heat and temperature in class discussions.
• Successfully predict which surfaces (black or white) absorb more radiant heat during the experiment.
• Complete the formative worksheet with accurate answers.
• Write a clear sentence describing how the Sun heats the Earth by radiation.

Materials Needed

• Desk lamps (preferably identical) to simulate radiant heat source
• Black and white card stock (or paper)
• Thermometers or temperature sensors (optional, for measurement)
• Worksheets with True/False and short answer questions (dyslexia-friendly font)
• Whiteboard and markers
• Timer or clock

Detailed Lesson Plan

1. Setting the Scene – Heat in Space (5 minutes)

Objective: Activate prior knowledge and generate curiosity

• Prompt students:
  “Imagine you are floating in space where there is no air. How can astronauts still feel warmth from the Sun?”
• Have students discuss in pairs (2 minutes), then share hypotheses aloud.

Teacher notes: Expect ideas like: energy from the Sun travels through space; light carries heat; heat doesn’t need air.

2. Heat vs. Temperature Conceptual Check (10 minutes)

Objective: Differentiate between heat and temperature

• Ask: “What is the difference between heat and temperature?”
• Record student responses on the whiteboard.
• Clarify with a simple analogy and scientific explanation:
  • Temperature measures how hot or cold something is (average particle energy).
  • Heat is energy that moves from one object to another because of temperature difference.
• Support visual learners with a diagram of particles moving slower in cooler water, faster in hot water.

3. Introductory Explanation: Modes of Thermal Transfer (5 minutes)

Objective: Introduce conduction, convection, radiation as modes of heat transfer

• Briefly explain three modes. Show examples:
  • Conduction: touching a hot pan
  • Convection: warm air rising
  • Radiation: warmth from the Sun
• Tell students that today’s focus is on radiation—heat transfer via electromagnetic waves without needing contact.

4. Guided Investigation: Radiation Experiment (20 minutes)

Objective: Explore absorption of radiant heat on different surfaces

Setup: Place black and white paper strips under a desk lamp at equal distances.

Procedure:

• Students predict which paper will get hotter faster and why.
• After 10 minutes of exposure, have students touch or measure (if possible) the temperature of both papers.
• Record observations.

Discussion:

• Explain why black surfaces absorb more radiant energy (pigment absorbs more wavelengths).
• Emphasize that heat transfer by radiation does not require touch or a medium.

5. Structured Notes & Visual Summary (5 minutes)

Objective: Consolidate understanding with key definitions and examples

• Provide students with a handout or have them copy notes:
  • Radiation = transfer of heat through electromagnetic waves, no contact necessary
  • Examples: Sun heating Earth, heat from a campfire, warmth from a heat lamp
• Use visuals or icons to support dyslexic readers.

6. Worksheet: True/False & Short Answer (10 minutes)

Objective: Formative assessment of lesson concepts

Part A: True or False

• Temperature is a form of energy. (False)
• Heat travels from colder object to hotter one. (False)
• The Sun heats the Earth by radiation. (True)
• Radiation requires direct contact. (False)

Part B: Short Answer

• Explain difference between heat and temperature.
• Why are white roofs used in hot climates?

Teacher checks responses to guide remediation.

7. Exit Slip: One-Sentence Assessment (5 minutes)

Objective: Summarize understanding succinctly

• Students write “In one sentence, explain how the Sun heats the Earth.”
• Ideal: “The Sun heats the Earth by radiation, transferring energy without direct contact.”

Differentiation Strategies

• For diverse learners:

  • Use dyslexia-friendly fonts in handouts.
  • Provide visual and verbal explanations side by side.
  • Partner struggling students with peers for discussion phases.
  • Use simple language and concrete examples.

• For advanced learners:

  • Invite them to research and present other radiant heat sources (e.g. infrared heaters, microwaves).
  • Challenge them to explain differences between radiation and other heat transfer modes in detail.

Extension Activities

• Design an investigation to compare conduction and radiation heat transfer using everyday materials.
• Create an illustrated poster explaining heat transfer by radiation to teach younger students.
• Calculate how much solar radiation a surface absorbs based on colour and angle (basic math application).

Reflection for Educators

• Gauge student engagement through discussion and worksheet accuracy.
• Address misconceptions during the clearing-up phase.
• Encourage use of scientific vocabulary: thermal energy, radiation, absorption, particles.
• Be ready to revisit conduction and convection in follow-up lessons.

By adapting and expanding this sequence, up to 2-3 lessons can comprehensively cover the specified learning outcome on thermal energy transfer modes focusing on radiation and absorption characteristics.