DP Biology (last assessment 2024)

Test builder »

Question 18N.3.HL.TZ0.1a

Select a Test
Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.HL.TZ0.1a
Level HL Paper 3 Time zone TZ0
Command term Calculate Question number a Adapted from N/A
a.
[Maximum mark: 1]
18N.3.HL.TZ0.1a

Measurements of the lung capacity of a student were recorded using a spirometer and displayed with a data logger. Initially the student was at rest, then changed to carrying out strenuous exercise. The results are displayed in the graph.

(a)

Calculate the ventilation rate at rest, giving the units.

[1]

Markscheme

12 breaths per minute/6 litres per minute ✔

 

Accept answers from 11 to 12 breaths per minute.

Accept answers from 5.5 to 6 litres per minute.

Answer must include breaths or litres and a standard unit of time.

Correct:
eg: 12 breaths / minute
eg: 0.1 L sec–1 or 6 L min–1

Incorrect:
eg: but 12 breaths = 0 marks

Syllabus sections