Time zones | PPT - Free Printable

Problem Analysis:

The image provided is a world map showing time zones, along with a set of questions related to time differences and geographical locations. The task involves solving the time-related questions based on the given map and understanding of time zones.

#### Key Points from the Image:
1. Time Zones: The map shows different time zones around the world, each represented by a color and labeled with the time difference from Greenwich Mean Time (GMT).
2. London: London is in the GMT time zone.
3. Other Cities: The map provides the time differences for various cities relative to GMT.

#### Questions to Solve:
1. If it is midnight in London:
- What time is it in New York?
- What time is it in Hong Kong?
- What time is it in Tokyo?
- What time is it in Sidney?
- What time is it in Paris?
- What time is it in Moscow?

2. Additional Questions:
- If Galicia is to the north of Portugal, why don't they use the same time as Portugal?
- If China has five time zones, why is it the same hour all over the country?
- If Spain is in the same time zone as Portugal, why is it more than an hour later than London (GMT+1)?

---

Solution:

#### Part 1: Time Differences if it is Midnight in London

London is in the GMT time zone. To determine the time in other cities, we need to look at their respective time zones relative to GMT.

1. New York:
- New York is in the Eastern Time Zone (EST), which is GMT-5.
- If it is midnight (00:00) in London, then in New York, it will be:
\[
00:00 - 5 = 19:00 \text{ (7:00 PM)}.
\]

2. Hong Kong:
- Hong Kong is in the GMT+8 time zone.
- If it is midnight (00:00) in London, then in Hong Kong, it will be:
\[
00:00 + 8 = 08:00 \text{ (8:00 AM)}.
\]

3. Tokyo:
- Tokyo is in the GMT+9 time zone.
- If it is midnight (00:00) in London, then in Tokyo, it will be:
\[
00:00 + 9 = 09:00 \text{ (9:00 AM)}.
\]

4. Sydney:
- Sydney is in the GMT+10 time zone.
- If it is midnight (00:00) in London, then in Sydney, it will be:
\[
00:00 + 10 = 10:00 \text{ (10:00 AM)}.
\]

5. Paris:
- Paris is in the GMT+1 time zone.
- If it is midnight (00:00) in London, then in Paris, it will be:
\[
00:00 + 1 = 01:00 \text{ (1:00 AM)}.
\]

6. Moscow:
- Moscow is in the GMT+3 time zone.
- If it is midnight (00:00) in London, then in Moscow, it will be:
\[
00:00 + 3 = 03:00 \text{ (3:00 AM)}.
\]

#### Answers for Part 1:
- New York: 7:00 PM
- Hong Kong: 8:00 AM
- Tokyo: 9:00 AM
- Sydney: 10:00 AM
- Paris: 1:00 AM
- Moscow: 3:00 AM

---

#### Part 2: Additional Questions

1. If Galicia is to the north of Portugal, why don't they use the same time as Portugal?
- Galicia is a region in Spain, and Spain uses GMT+1 (Central European Time, CET). Portugal also uses GMT+1 during standard time but switches to GMT during daylight saving time. However, Galicia follows Spanish time, which is GMT+1, even though geographically it might align more closely with Portugal's position. This is due to political and administrative decisions rather than strict geographical alignment.

2. If China has five time zones, why is it the same hour all over the country?
- Despite having a large geographical span that naturally covers five time zones, China officially uses a single time zone: GMT+8 (China Standard Time, CST). This decision was made for practical reasons, such as simplifying communication and coordination across the vast country. Using a single time zone helps maintain national unity and efficiency, despite the natural time differences.

3. If Spain is in the same time zone as Portugal, why is it more than an hour later than London (GMT+1)?
- Spain and Portugal are both in the GMT+1 time zone during standard time. However, historically, Spain adopted Central European Time (CET, GMT+1) during World War II and never reverted to its original time zone (which was GMT). This shift was partly due to political alignment with Germany and France. As a result, Spain is now one hour ahead of GMT, even though geographically it would naturally align more closely with GMT.

---

Final Answers:

1. Time Differences if it is Midnight in London:
- New York: 7:00 PM
- Hong Kong: 8:00 AM
- Tokyo: 9:00 AM
- Sydney: 10:00 AM
- Paris: 1:00 AM
- Moscow: 3:00 AM

2. Additional Questions:
- Galicia does not use the same time as Portugal because Spain uses GMT+1, and Galicia follows Spanish time.
- China uses a single time zone (GMT+8) for practical and administrative reasons.
- Spain is more than an hour later than London because it adopted GMT+1 during World War II and has maintained this time zone since then.

Final Answer Boxed:
\[
\boxed{
\begin{aligned}
&\text{New York: 7:00 PM} \\
&\text{Hong Kong: 8:00 AM} \\
&\text{Tokyo: 9:00 AM} \\
&\text{Sydney: 10:00 AM} \\
&\text{Paris: 1:00 AM} \\
&\text{Moscow: 3:00 AM} \\
&\text{Galicia uses GMT+1 because Spain uses GMT+1.} \\
&\text{China uses a single time zone (GMT+8) for practical reasons.} \\
&\text{Spain is GMT+1 due to historical adoption during WWII.}
\end{aligned}
}
\]