Question 20N.3.SL.TZ0.14
| Date | November 2020 | Marks available | [Maximum mark: 4] | Reference code | 20N.3.SL.TZ0.14 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Define, Identify | Question number | 14 | Adapted from | N/A |
The astronomical unit () and light year () are convenient measures of distance in astrophysics. Define each unit.
:
:
[2]
: «average» distance from the Earth to the Sun ✓
: distance light travels in one year ✓
An image of a comet is shown.
Comet P/Halley as taken March 8, 1986 by W. Liller, Easter Island, part of the International Halley Watch (IHW) Large Scale Phenomena Network.
Comets develop a tail as they approach the Sun. Identify one other characteristic of comets.
[1]
made of ice «and dust» ✓
«highly» eccentric/elliptical orbit around the Sun ✓
formed in the Oort Cloud ✓
Identify one object visible in the image that is outside our Solar System.
[1]
star / named star / stellar cluster/ galaxy/ constellation ✓
Answer may be indicated on the photograph.