{
 "source": "https://peabody.kids/flashcards/math-time",
 "id": "math-time",
 "title": "Time and the Calendar",
 "category": "math",
 "subject": "Math",
 "levels": [
  "k-2",
  "3-5",
  "6-8"
 ],
 "description": "Time units, telling time, elapsed time and the calendar.",
 "tags": [
  "time",
  "clocks",
  "calendar"
 ],
 "frontLabel": "Question",
 "backLabel": "Answer",
 "cards": [
  [
   "Seconds in a minute",
   "60"
  ],
  [
   "Minutes in an hour",
   "60"
  ],
  [
   "Seconds in an hour",
   "3,600"
  ],
  [
   "Hours in a day",
   "24"
  ],
  [
   "Minutes in a day",
   "1,440"
  ],
  [
   "Seconds in a day",
   "86,400"
  ],
  [
   "Days in a week",
   "7"
  ],
  [
   "Days in a year",
   "365"
  ],
  [
   "Days in a leap year",
   "366"
  ],
  [
   "Weeks in a year",
   "52 (plus 1 or 2 days)"
  ],
  [
   "Months in a year",
   "12"
  ],
  [
   "Years in a decade",
   "10"
  ],
  [
   "Years in a century",
   "100"
  ],
  [
   "Years in a millennium",
   "1,000"
  ],
  [
   "Months with 31 days",
   "January, March, May, July, August, October, December"
  ],
  [
   "Months with 30 days",
   "April, June, September, November"
  ],
  [
   "Days in February",
   "28, or 29 in a leap year"
  ],
  [
   "Knuckle trick for month lengths",
   "Knuckles are 31-day months, valleys between are shorter months"
  ],
  [
   "Leap year rule",
   "Every 4 years, except century years not divisible by 400"
  ],
  [
   "Is 2000 a leap year?",
   "Yes"
  ],
  [
   "Is 1900 a leap year?",
   "No"
  ],
  [
   "Is 2028 a leap year?",
   "Yes"
  ],
  [
   "Is 2026 a leap year?",
   "No"
  ],
  [
   "Order of the days of the week",
   "Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday"
  ],
  [
   "Order of the months",
   "January through December"
  ],
  [
   "Seasons in order (northern hemisphere)",
   "Winter, spring, summer, fall"
  ],
  [
   "Quarter past 3",
   "3:15"
  ],
  [
   "Half past 7",
   "7:30"
  ],
  [
   "Quarter to 9",
   "8:45"
  ],
  [
   "Ten minutes to 6",
   "5:50"
  ],
  [
   "Meaning of a.m.",
   "From midnight to just before noon"
  ],
  [
   "Meaning of p.m.",
   "From noon to just before midnight"
  ],
  [
   "12:00 a.m. is",
   "Midnight"
  ],
  [
   "12:00 p.m. is",
   "Noon"
  ],
  [
   "3:00 p.m. in 24-hour time",
   "15:00"
  ],
  [
   "18:30 in 12-hour time",
   "6:30 p.m."
  ],
  [
   "00:00 in 12-hour time",
   "12:00 a.m. (midnight)"
  ],
  [
   "Elapsed time from 2:15 to 4:45",
   "2 hours 30 minutes"
  ],
  [
   "Elapsed time from 9:40 a.m. to 11:10 a.m.",
   "1 hour 30 minutes"
  ],
  [
   "Time 45 minutes after 3:30",
   "4:15"
  ],
  [
   "Time 2 hours before 1:00 p.m.",
   "11:00 a.m."
  ],
  [
   "Minutes in 2 and a half hours",
   "150"
  ],
  [
   "Hours in 3 days",
   "72"
  ],
  [
   "Hours in a week",
   "168"
  ],
  [
   "Minutes in a quarter hour",
   "15"
  ],
  [
   "Convert 90 minutes to hours",
   "1.5 hours"
  ],
  [
   "Convert 2 hours to seconds",
   "7,200"
  ],
  [
   "Convert 3 weeks to days",
   "21"
  ],
  [
   "Convert 18 months to years",
   "1.5 years"
  ],
  [
   "Fortnight",
   "Two weeks (14 days)"
  ],
  [
   "Biweekly",
   "Every two weeks"
  ],
  [
   "Semester",
   "Half of a school year"
  ],
  [
   "Which hand moves faster, hour or minute?",
   "Minute hand"
  ],
  [
   "How far does the minute hand move in 5 minutes?",
   "From one number to the next (30 degrees)"
  ],
  [
   "Degrees the minute hand turns in an hour",
   "360"
  ],
  [
   "Time zone",
   "A region that shares the same standard time"
  ],
  [
   "Number of time zones in the contiguous US",
   "Four: Eastern, Central, Mountain, Pacific"
  ],
  [
   "Greenwich Mean Time (GMT)",
   "Time at the 0 degree longitude line through Greenwich, England"
  ],
  [
   "Calendar year starts and ends",
   "January 1 to December 31"
  ],
  [
   "BCE and CE",
   "Before Common Era and Common Era, used to number years"
  ],
  [
   "Digital vs. analog clock",
   "Digital shows numbers; analog uses hands on a dial"
  ]
 ]
}