

Leap Seconds and Timekeeping Concepts
Interactive Video
•
Physics, Science
•
9th - 10th Grade
•
Practice Problem
•
Hard
Sophia Harris
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary reason for adding a leap day every four years?
To adjust for daylight saving time
To align with the lunar calendar
To correct the calendar for Earth's orbit around the Sun
To celebrate an extra day in February
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a leap second?
A second added to celebrate New Year's Eve
A second subtracted to adjust for atomic time
A second added to account for Earth's slowing rotation
A second added to the calendar every four years
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where is the leap second inserted in the United States?
At the White House
At NASA headquarters
At the US Naval Observatory
At the Pentagon
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is mean solar time based on?
The Earth's rotation relative to the Sun
The oscillations of an atom
The Earth's orbit around the Sun
The lunar cycle
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is a second defined in atomic time?
By the lunar cycle
By the Earth's rotation
By the position of the Sun
By the oscillations of an atom
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the expected accuracy of the UK's National atomic clock?
Within one second for the next 10,000 years
Within one second for the next 138 million years
Within one second for the next 1,000 years
Within one second for the next 100 years
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one argument against the leap second?
It disrupts the lunar calendar
It confuses the general public
It is too expensive to implement
It is unnecessary and causes issues for technology
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