Energy Resources and Building Performance
Grade 12 | Science | Unit 05
Teacher's Guide
Learning objectives
- Explain the central ideas of energy resources and building performance using appropriate vocabulary.
- Apply the worked example and justify answers to the practice questions.
- Complete the investigation or design task and identify a limitation of its model or evidence.
Prerequisites: Relevant Grade 9-11 biology or chemistry; algebra and evidence evaluation.
Suggested time: Two or three 45-minute sessions; extend the activity when needed.
Teaching sequence
- Elicit a prior explanation of the topic and note uncertain vocabulary.
- Discuss the concept section, distinguishing observations, models, and assumptions.
- Work through the example. Ask students to explain each step and check any units.
- Complete the activity, then use the five practice questions as an individual check.
- Review the two vocabulary questions and revisit misconceptions revealed by the answers.
Assessment and differentiation
Use the seven questions in the companion CSV for retrieval practice or a short quiz. Award one point per entry for an accurate answer; accept scientifically equivalent wording. Treat five correct answers as a suggested checkpoint for further review, with both reasoning and activity quality assessed separately. Support students with a labeled diagram, a word bank, or a completed first step. Extend by asking students to change one example condition, predict the effect, and explain a limitation.
Student Worksheet
Concept and helping material
Energy decisions require accounting for useful output, losses, and the source of input energy. Power is the rate of energy transfer. Efficiency compares useful output with input, while conservation can reduce demand. Buildings exchange energy through conduction, moving air, and radiation. Insulation, shading, and appropriate ventilation can influence performance. Renewable sources replenish on relevant timescales but have material, land, and storage tradeoffs. A simplified model can compare options if assumptions are explicit; it cannot replace measured performance or a professional building design.
Vocabulary
- Power: Rate of energy transfer or conversion.
- Kilowatt-hour: An energy unit equal to 1 kW of power used for 1 hour.
Worked example
A lamp rated at 10 W runs for 5 h, using 50 Wh = 0.050 kWh. Replacing a 60 W lamp for the same duration reduces modeled use from 0.300 to 0.050 kWh, a saving of 0.250 kWh, assuming equal use time.
Investigation or design task
Compare supplied energy-use data for two classroom lighting plans. State the functional requirement, calculate use, and evaluate one tradeoff beyond energy consumption.
Practice
- How much energy does a 20 W device use in 4 h?
- Is a kilowatt-hour a unit of power?
- What is efficiency for 30 J useful output from 100 J input?
- Why compare equal lighting service rather than only lamp wattage?
- Does insulation create thermal energy?
Vocabulary retrieval
- Define Power.
- Define Kilowatt-hour.
Reflection
Explain which evidence, calculation, or model supports one of your answers. State a condition under which your explanation might need revision.
Answer Key
- 80 Wh, or 0.080 kWh.
- No. It is a unit of energy.
- 30%.
- Lower power is not sufficient if the required illumination is not provided.
- No. It reduces some forms of energy transfer.
Vocabulary definitions appear above and are also included in the CSV. Activity answers may vary; require a clear method or design, correct use of lesson concepts, and an explicit limitation. Reflection is assessed for reasoning rather than one fixed phrase.
Source Reference
Everything You Need to Ace Science in One Big Fat Notebook, PDF viewer pages 141-153,186-194 (1-based). Page numbers refer to this supplied file and may differ from printed page numbers. The source is background reading for the grouped topic. Lesson explanations, examples, and questions are original teaching material; they do not reproduce the book's worksheets or illustrations.