A student placed equal amounts of water on two warm surfaces. One surface was uncovered, allowing more water to evaporate. The other was covered to reduce evaporation. The student recorded the surface temperatures.
| Time (minutes) | Uncovered surface temperature (°C) | Covered surface temperature (°C) |
|---|---|---|
| 0 | 34 | 34 |
| 4 | 29 | 32 |
Calculate the temperature fall for each surface after four minutes and explain why the falls differ.
78 exam-style questions on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one has a worked solution and a mark scheme showing where the marks go.