Time Zones

Lesson: Time Zones

1/13

David is texting with his friend Risa, who just moved across the country.
After a little while, Risa texts David that it's time for her to go to bed.

David looks outside to see the sun shining and is confused why Risa would go to bed when it's so early! 'What time is it?' David texts back. 'It's 9:00PM!' Risa responds. What's going on here? Did David go back in time somehow?

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Although it would be great if this lesson was about time travel, it's not. We haven't quite figured out time travel yet.

 

What's happening to David and Risa is actually just a natural event that happens every day to our planet. Since Risa moved across the country, she's now in a different time zone.

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Lesson: Time Zones

5/13

Lesson: Time Zones

6/13

As the Earth rotates on its axis, the Sun shines on only one part of the Earth at a time. 

While the sun shines where we live, it’s nighttime somewhere else. 

When you’re eating your breakfast cereal, children in Paris are finishing the school day and children in Moscow are eating dinner. 

Children in Bangkok are going to bed and children in Sydney, Australia are getting up for the next day of school.

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Multiple Choice

True or False: It is the same time everywhere in the world right now.

• True
• False

Multiple Choice

An area where all clocks are set to the same time is called a ___. 

• time segment
• time zone
• time interval
• time zone boundary

Lesson: Time Zones

8/13

Changes in time occur whenever you travel between time zones. If you travel into the next time zone to the east, you gain an hour. If you travel into the next time zone to the west, you lose an hour. Think: "west is less"

From West to East - add hour
From East to West - subtract an hour

Multiple Choice

When we travel across Time Zones ____. 

• we ignore the time difference.
• we always stay on our original time.
• we adjust our clocks to match local time.
• we never change our schedules.

Multiple Choice

As you travel from East to West, the time...

• decreases by one hour

• increases by one hour

• stays the same

Lesson: Time Zones

9/13

Lesson: Time Zones

10/13

Dropdown

When it is 6:00 in PA (Pennsylvania), it is ​​

Select answer

in CA (California)

Dropdown

Emma lives in TX (Texas). She is getting ready for bed, but decides to call her friend before she goes to sleep. It is 8:37 at her house. Her friend lives in NV (Nevada), it is ​

Select answer

there.