1. What is not considered the primary unit of time measurement? a) Days b) Years c) Months 2. What is

1. What is not considered the primary unit of time measurement?
a) Days
b) Years
c) Months

2. What is the term for a unit of time measured by celestial bodies?
a) Stellar hour
b) Stellar days
c) Stellar year

3. From which point is stellar time measured in terms of hour angle?
a) Vernal equinox point
b) Autumnal equinox point
c) Winter solstice point

4. What is the moment of the Sun’s highest culmination called?
a) Solar zenith
b) True noon
c) Star rising

5. How much longer are true solar days compared to stellar days?
a) Ten minutes
b) Seven minutes
c) Four minutes

6. What is the term for the difference between true and mean solar time?
a) Equation of time
b) Time difference
c) Time remainder

7. When was daylight saving time introduced in Russia?
a) In 1918
b) In 1957
c) In 1941

8. What calendar is based on the change of seasons?
a) Calendar based on the change of seasons in the year
b) Calendar based on lunar phases
c) Calendar based on solar opposition

9. Who developed the Julian calendar?
a) Sosigenes
b) Julius Caesar
c) Alexander of Egh

10. What is the modern system of time measurement called?
a) Julian calendar
b) Gregorian calendar
c) Proleptic calendar

Part 2 (Second Level):
1. What is referred to as a tropical year?
2. What is star time?
3. What is true solar time?
4. What is mean solar time?
5. What is Coordinated Universal Time (UTC)?
6. What is standard time?
7. What is the equation of time? Please write down this equation.
8. How is local time related to geographic longitude?
9. Explain the relationship between standard time and Coordinated Universal Time (UTC).
10. How do the Julian and Gregorian calendars differ?