DP Biology (last assessment 2024)

Test builder »

Question 23M.3.HL.TZ1.a

Select a Test
Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.3.HL.TZ1.a
Level HL Paper 3 Time zone TZ1
Command term Suggest Question number a Adapted from N/A
a.
[Maximum mark: 1]
23M.3.HL.TZ1.a

Suggest a reason for including a lid with vents above the water reservoir.

[1]

Markscheme
  1. lowers evaporation of water;
  2. vents allow air to enter as water leaves the reservoir;
  3. allows for pressure changes in the reservoir as water flows to the flask;
Examiners report

There were many incorrect reasons for a lid with air vents given but perhaps a quarter were able to give a correct reason.

Syllabus sections