The method and the results are on the forms of energy lab. Do the analysis yourself first, then check the answers below.
Quick answer: Energy is the ability to make things change, and it is measured in joules (J). These answers go with the grade 6 science lab on forms of energy: the graph, the calculations, the uncertainties and the conclusion explained, for all 7 analysis questions.
Here are the forms of energy lab answers for grade 6 science: graph, calculations, uncertainties and conclusion. First do the lab yourself, then compare, and go back to the lesson if needed.
The sample data show a much larger temperature rise near the filament lamp, which means it gives out far more thermal energy. Compare your own readings with these answers and check your graph shapes and calculations.
The filament curve rises steeply and then flattens; the LED curve rises very gently. The curve flattens because the thermometer loses thermal energy to the air as fast as it gains it, so the temperature levels off.
Question 4 Comparison
17.0 ÷ 1.5 = 11.3, so the filament rise is about 11 times greater.
Question 5 Conclusion
Both lamps gave similar light, but the filament lamp gave out much more thermal energy, so it transforms a larger share of its electrical energy into wasted thermal energy. The LED lamp is more efficient.
Question 6 Fair test
Keep the distance from lamp to thermometer (2 cm), the starting temperature and the time of heating the same, and use similar thermometers and the same room position.
Question 7 Uncertainty
LED: 0.5 ÷ 1.5 × 100 = 33 %. Filament: 0.5 ÷ 17.0 × 100 = 2.9 %. The filament result is more reliable because its uncertainty is much smaller.
