Skip to content
MathsGenie logo
Open app

Course home

  1. GCSE
  3. Biology Edexcel
  5. Question bank

Homeostasis and thermoregulation

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849
Question 12

A student investigated the cooling effect of evaporation to model sweating.

They set up two identical boiling tubes, each with a thermometer as shown in the diagram below.

  • Boiling Tube A was wrapped in a layer of wet cotton wool.
  • Boiling Tube B was wrapped in a layer of dry cotton wool.

Hot water was added to each boiling tube, and their temperatures were recorded every minute for 10 minutes.

Two boiling tubes, Tube A and Tube B, mounted vertically in stands. Each tube has a thermometer inserted into it. Tube A is wrapped in a layer of wet cotton wool, while Tube B is wrapped in a layer of dry cotton wool of identical thickness.

State two variables that the student must control in this investigation to ensure a fair test.

[2]

Homeostasis and thermoregulation Questions

  1. GCSE
  2. /Biology
  3. /Homeostasis and thermoregulation