| Date | May 2021 | Marks available | 1 | Reference code | 21M.1.SL.tz0.23 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 23 | Adapted from | N/A |
Question
Why are yellow balls used in tennis?
A. To increase signal intensity
B. To limit background noise
C. To improve the efficiency of sense organs
D. To improve memory retrieval
Markscheme
A
Examiners report
Common higher level question. Mid-difficulty question. Answer C was the main distractor.
