How long does the earth take to rotate one full turn

1
How long does the earth take to rotate one full
turn?

• 24 hours
• Duh, 24 hours
• About 23 hours and 56 minutes
• One year

2
How long does the earth take to rotate one full
turn?

• 24 hours
• Duh, 24 hours
• About 23 hours and 56 minutes
• One year

3
Why do we call a day 24 hours, if the earth
rotates in 23 hours, 56 min?

• For simplicity it is about 24 hours
• We measure a day by the position of the sun, so
  earths revolution around the sun affects the
  length of day
• In order to have an integral (even) number of
  days in each month
• The earths epicycle is about 4 minutes
• None of the above reasons

4
Why do we call a day 24 hours, if the earth
rotates in 23 hours, 56 min?

• For simplicity it is about 24 hours
• We measure a day by the position of the sun, so
  earths revolution around the sun affects the
  length of day
• In order to have an integral (even) number of
  days in each month
• The earths epicycle is about 4 minutes
• None of the above reasons

5
How much do sidereal and solar clocks differ
after one day?

• 4 minutes
• About an hour
• About two hours
• 24 hours
• None of the above

6
How much do sidereal and solar clocks differ
after one day?

• 4 minutes
• About an hour
• About two hours
• 24 hours
• None of the above

7
How much do sidereal and solar clocks differ
after one month?

• 4 minutes
• About an hour
• About two hours
• 24 hours
• None of the above

8
How much do sidereal and solar clocks differ
after one month?

• 4 minutes
• About an hour
• About two hours
• 24 hours
• None of the above

9
The constellation Orion rises in the early
evening December 1. When will it rise on Jan. 1?

• About the same time
• It depends on where you are in the US
• About four minutes earlier
• Two hours earlier than it did on Dec. 1
• None of the above

10
The constellation Orion rises in the early
evening December 1. When will it rise on Jan. 1?

• About the same time
• It depends on where you are in the US
• About four minutes earlier
• Two hours earlier than it did on Dec. 1
• None of the above

11
The constellation Orion rises in the early
evening December 1. When will it rise in August?

• About the same time
• It depends on where you are in the US
• In the early morning, before dawn
• It wont rise in August it is a Winter
  constellation
• None of the above

12
The constellation Orion rises in the early
evening December 1. When will it rise in August?

• About the same time
• It depends on where you are in the US
• In the early morning, before dawn
• It wont rise in August it is a Winter
  constellation
• None of the above

13
The time of apparent noon varies with longitude.
For convenience we pretend that it doesnt for
nearby places. This is called

• The equation of time
• The analemma
• Time Zones
• Precession
• None of the above

14
The time of apparent noon varies with longitude.
For convenience we pretend that it doesnt for
nearby places. This is called

• The equation of time
• The analemma
• Time Zones
• Precession
• None of the above

15
The English poet Kipling, while in the tropics,
wrote, The sun comes up like thunder over China
cross the bay. What astronomical truth inspired
this?

• None its just poetry
• Sunrise is louder in the tropics
• Sunrise is faster in the tropics
• None of the above

16
The English poet Kipling, while in the tropics,
wrote, The sun comes up like thunder over China
cross the bay. What astronomical truth inspired
this?

• None its just poetry
• Sunrise is louder in the tropics
• Sunrise is faster in the tropics (more
  perpendicular to the horizon)
• None of the above

17
Suppose that you live at latitude 40 degrees
north in the US. How high does the sun get at
noon on June 21?

• 40 degrees above the southern horizon
• 50 degrees above the southern horizon
• 73 degrees above the southern horizon
• At noon it is overhead
• None of the above

18
Suppose that you live at latitude 40 degrees
north in the US. How high does the sun get at
noon on June 21?

• 40 degrees above the southern horizon
• 50 degrees above the southern horizon
• 73 degrees above the southern horizon
• At noon it is overhead
• None of the above