DP Physics (last assessment 2024)
Question 19N.3.HL.TZ0.b(i)
| Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.3.HL.TZ0.b(i) |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | b(i) | Adapted from | N/A |
b(i).
[Maximum mark: 1]
19N.3.HL.TZ0.b(i)
Evidence from the Planck space observatory suggests that the density of matter in the universe is about 32 % of the critical density of the universe.
State what is meant by the critical density.
[1]
Markscheme
density of flat/Euclidean universe
OR
density for which universe has zero curvature
OR
density resulting in universe expansion rate tending to zero ✔
