Year 9 Science · Unit 3 · Lesson 23
Foundation Worksheet
Learning Goals
Match each report section to its description
Write the correct letter from the right column next to each section name. Each letter is used once.
| Report section | Your answer | Description |
|---|---|---|
| Abstract | A. Explains what the results mean, links back to the hypothesis, discusses sources of error and limitations. | |
| Introduction | B. Presents raw data using tables and graphs; does not include any explanation or interpretation. | |
| Method | C. A brief summary (150–250 words) of the whole investigation: aim, key findings, and conclusion. | |
| Results | D. Provides background science, defines key terms, states the aim and hypothesis, explains why the investigation matters. | |
| Discussion | E. A step-by-step description of what was done; written so that anyone could repeat the investigation exactly. | |
| Conclusion | F. A short, direct answer to the research question, stating whether the hypothesis was supported and summarising the key finding. |
Order the steps, conducting a school energy audit
Number the steps from 1 (first) to 8 (last) to show the correct order for conducting a school energy audit. The first step has been done for you.
| Order | Step |
|---|---|
| Measure the wattage of each appliance using its nameplate label or a plug-in power meter | |
| Calculate energy use (E = P × t) and convert to kWh for each appliance | |
| Compare actual energy use to energy-efficient alternatives and star rating benchmarks | |
| Record how many hours per day each appliance is used (including standby time) | |
| 1 | Walk through the school and identify all electrical appliances and energy-using systems |
| Estimate annual electricity cost using cost per kWh (approximately 30 cents/kWh) | |
| Write specific, evidence-based recommendations to reduce the school's energy consumption and costs | |
| Analyse results to identify which appliances or areas use the most energy overall |
1. A classroom has 20 LED lights, each rated at 10 W. They are left on for 8 hours per day on 200 school days per year. Calculate the total energy used by the lights per year. Show your working using E = P × t. (Hint: first find total power, then convert to kWh.)
2. Explain why reliability is important when collecting energy data during an audit. Give one example of how a student could improve the reliability of their energy measurements.
Wrap Up
In one sentence, what was the main idea of this lesson?