Time zones worksheet with exercises on telling time and comparing time differences between cities.

Problem Analysis and Solution

The worksheet focuses on understanding time zones and converting times between different cities. Let's break down each part of the problem and solve it step by step.

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#### Part 1: Look at the clocks and choose the correct option.

This section involves identifying the time shown on each clock. The reference clock face is provided to help interpret the times.

1. Clock 1: The hour hand is just past 7, and the minute hand is on 12. This indicates 7:00.
2. Clock 2: The hour hand is just past 9, and the minute hand is on 12. This indicates 9:00.
3. Clock 3: The hour hand is just past 4, and the minute hand is on 12. This indicates 4:00.
4. Clock 4: The hour hand is just past 8, and the minute hand is on 12. This indicates 8:00.

So, the times are:
- Clock 1: 7:00
- Clock 2: 9:00
- Clock 3: 4:00
- Clock 4: 8:00

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#### Part 2: How many hours ahead of San Francisco are the following cities?

This section requires determining the time difference between San Francisco and other cities based on the given clock times. We are told that San Francisco is in the Pacific Time Zone (PST).

##### Step-by-Step Solution:

1. San Francisco (USA):
- Time: 4:00 AM
- This is the reference time.

2. Mexico City (Mexico):
- Time: 5:00 AM
- Difference: 5:00 AM - 4:00 AM = 1 hour ahead.

3. New York (USA):
- Time: 7:00 AM
- Difference: 7:00 AM - 4:00 AM = 3 hours ahead.

4. Rio de Janeiro (Brazil):
- Time: 1:00 PM
- Difference: 1:00 PM (13:00) - 4:00 AM = 9 hours ahead.

5. Madrid (Spain):
- Time: 10:00 AM
- Difference: 10:00 AM - 4:00 AM = 6 hours ahead.

6. Istanbul (Turkey):
- Time: 8:00 PM
- Difference: 8:00 PM (20:00) - 4:00 AM = 16 hours ahead.

7. Bangkok (Thailand):
- Time: 9:00 PM
- Difference: 9:00 PM (21:00) - 4:00 AM = 17 hours ahead.

##### Completed Table:

| City | Country | Time | Number of hours ahead of San Francisco |
|-----------------|---------|------------|----------------------------------------|
| San Francisco | USA | 4:00 AM | |
| Mexico City | Mexico | 5:00 AM | 1 + 0 |
| New York | USA | 7:00 AM | 3 + 0 |
| Rio de Janeiro | Brazil | 1:00 PM | 9 + 0 |
| Madrid | Spain | 10:00 AM | 6 + 0 |
| Istanbul | Turkey | 8:00 PM | 16 + 0 |
| Bangkok | Thailand| 9:00 PM | 17 + 0 |

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#### Part 3: Write the times and add "in the morning," "in the afternoon," or "in the evening."

This section requires writing the times for Madrid, Bangkok, and Rio de Janeiro in a complete sentence format.

1. Madrid (Spain):
- Time: 10:00 AM
- Sentence: It's ten o'clock in the morning in Madrid.

2. Bangkok (Thailand):
- Time: 9:00 PM
- Sentence: It's nine o'clock in the evening in Bangkok.

3. Rio de Janeiro (Brazil):
- Time: 1:00 PM
- Sentence: It's one o'clock in the afternoon in Rio de Janeiro.

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Final Answer:

1. Clock Times:
- Clock 1: 7:00
- Clock 2: 9:00
- Clock 3: 4:00
- Clock 4: 8:00

2. Time Differences:
- Mexico City: 1 hour ahead
- New York: 3 hours ahead
- Rio de Janeiro: 9 hours ahead
- Madrid: 6 hours ahead
- Istanbul: 16 hours ahead
- Bangkok: 17 hours ahead

3. Sentences:
- Madrid: It's ten o'clock in the morning in Madrid.
- Bangkok: It's nine o'clock in the evening in Bangkok.
- Rio de Janeiro: It's one o'clock in the afternoon in Rio de Janeiro.

Final Answer Boxed:
\[
\boxed{
\begin{array}{l}
\text{Clock 1: 7:00} \\
\text{Clock 2: 9:00} \\
\text{Clock 3: 4:00} \\
\text{Clock 4: 8:00} \\
\text{Mexico City: 1 hour ahead} \\
\text{New York: 3 hours ahead} \\
\text{Rio de Janeiro: 9 hours ahead} \\
\text{Madrid: 6 hours ahead} \\
\text{Istanbul: 16 hours ahead} \\
\text{Bangkok: 17 hours ahead} \\
\text{Madrid: It's ten o'clock in the morning in Madrid.} \\
\text{Bangkok: It's nine o'clock in the evening in Bangkok.} \\
\text{Rio de Janeiro: It's one o'clock in the afternoon in Rio de Janeiro.}
\end{array}
}
\]