Question 20N.3.SL.TZ0.b
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.3.SL.TZ0.b |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | b | Adapted from | N/A |
In an investigation to compare the elasticity of arteries and veins, rings of the same diameter (20 mm) of artery and vein tissue were cut from blood vessels obtained from a mammal.
[Source: © International Baccalaureate Organization 2020.]
Each ring was attached to a clamp. Multiple masses of 10 g were added and removed. The vertical diameter of the artery and the vein was measured, both with the mass and once the mass had been removed.
The results are shown in the table.
State one feature of the rings that has to be kept constant apart from their initial diameter.
[1]
a. width/section depth/slice of the ring;
b. same animal/age/freshness/temperature;
Don’t accept thickness or diameter.
In part (b) many candidates suggested that the samples should be of the same thickness.
