Science Experiment Notes: Insulation and Heat Loss

Investigation of Insulation Effect on Heat Loss

Experiment Overview

• Objective: Year 10 STEAM students at Kambrya College investigated how the number of cling wrap layers affects the temperature of water in a beaker.
• Procedure:
  • 80 mL of warm water (initial temperature of $40^{\circ}C$) was measured into two beakers.
  • Cardboard was placed at the top and bottom of each beaker.
  • Cling wrap layers were varied around one beaker across different groups.
  • Temperature was recorded every 2 minutes.

Variables

• Independent Variable: Number of layers of cling wrap.
• Dependent Variable: Temperature of the water (in $^{\circ}C$).
• Controlled Variables:
  • Volume of water (80 mL).
  • Initial temperature of water ($40^{\circ}C$).
  • Type of beaker.
  • Time interval for temperature measurement (2 minutes).
  • Size and type of cardboard used.

Data Table (Incomplete - Averages need to be filled)

Averages Calculation

• For 2 layers: $\frac{27 + 26 + 28}{3} = 27$
• For 4 layers: $\frac{30 + 29 + 32}{3} = 30.33$
• For 6 layers: $\frac{33 + 35 + 36}{3} = 34.67$
• For 8 layers: $\frac{38 + 37 + 39}{3} = 38$

Graph Plotting

• X-axis: Number of layers of cling wrap.
• Y-axis: Temperature ($^{\circ}C$).
• Title: Temperature vs. Number of Cling Wrap Layers

Risks and Precautions

• Risk/Hazard: Hot water causing burns.
• Precaution: Handle hot water with care; use gloves if necessary.
• Risk/Hazard: Broken glass from beakers.
• Precaution: Handle beakers carefully; wear safety glasses.

Conclusion

• The conclusion should link the aim (how insulation affects temperature) to the graph's shape.
• As the number of cling wrap layers increases, the temperature of the water also increases. This indicates that more insulation leads to a higher temperature.
• Example: Based on the data, increasing the number of cling wrap layers from 2 to 8 resulted in an increase in temperature from 27$^{\circ}C$ to 38$^{\circ}C$, demonstrating that increased insulation reduces heat loss.