Here is the step-by-step solution to the problems on the worksheet.
1. If Christina lives in London, England and she updates her blog at 7 p.m., what time will it be when she updates for her readers in California?
*
Step 1: Find London on the map. It is located at the
+0 time zone line.
*
Step 2: Find California on the map. Looking at the west coast of North America, it aligns with the
-8 time zone line.
*
Step 3: Calculate the difference. To go from +0 to -8, you subtract 8 hours.
*
Step 4: Do the math. Start at 7:00 p.m. and count back 8 hours.
* 7 p.m. minus 7 hours is 12:00 p.m. (noon).
* Subtract 1 more hour to get to 11:00 a.m.
*
Result: It will be 11:00 a.m. in California.
2. If newscasters begin reporting on an earthquake in Beijing at 4 a.m., at what time will viewers in New York see the coverage?
*
Step 1: Find Beijing on the map. It is located at the
+8 time zone line.
*
Step 2: Find New York on the map. It is located on the east coast of North America at the
-5 time zone line.
*
Step 3: Calculate the difference. To go from +8 to -5, you have to cross zero. The total difference is $8 + 5 = 13$ hours. Since New York is to the west (negative numbers), New York is 13 hours *behind* Beijing.
*
Step 4: Do the math. Start at 4:00 a.m. in Beijing and subtract 13 hours.
* 4:00 a.m. minus 4 hours is 12:00 a.m. (midnight).
* We still need to subtract 9 more hours ($13 - 4 = 9$).
* Going back 9 hours from midnight takes us into the previous day.
* Midnight minus 9 hours is 3:00 p.m.
*
Result: It will be 3:00 p.m. on the previous day in New York.
3. The flight from Chicago to Moscow is 20 hours long. If a plane leaves Chicago at 6:30 p.m. on January 26th, what time and day will it arrive in Moscow?
*
Step 1: Find the time zones. Chicago is at
-6 and Moscow is at
+3.
*
Step 2: Calculate the time difference between the cities. To go from -6 to +3, the difference is $6 + 3 = 9$ hours. Moscow is 9 hours *ahead* of Chicago.
*
Step 3: Determine the arrival time in Chicago time first.
* Departure: Jan 26th, 6:30 p.m.
* Flight duration: 20 hours.
* Add 20 hours to 6:30 p.m.
* From 6:30 p.m. to 6:30 p.m. the next day is 24 hours. Since the flight is only 20 hours, it arrives 4 hours before 6:30 p.m. the next day.
* 6:30 p.m. minus 4 hours is 2:30 p.m.
* So, the plane lands at 2:30 p.m. on January 27th (Chicago time).
*
Step 4: Convert the arrival time to Moscow time.
* Moscow is 9 hours ahead.
* Take the Chicago arrival time (Jan 27th, 2:30 p.m.) and add 9 hours.
* 2:30 p.m. + 9 hours = 11:30 p.m.
* Since we didn't cross midnight again, the date stays the same.
*
Result: It will be 11:30 p.m. on January 27th in Moscow.
Final Answer:
1. 11:00 a.m.
2. 3:00 p.m. (on the previous day)
3. 11:30 p.m. on January 27th
Parent Tip: Review the logic above to help your child master the concept of time zone worksheet printables.
