Maths Standard Year 11 - Module 2 - Lesson 21

Time Zones and UTC

Use this worksheet after reading the lesson to practise the key ideas and prove you can meet the success criteria.

Name

Date

Class

1. Key Ideas

When it's Tuesday afternoon in Sydney, it's still Monday in New York. UTC is the anchor — know a city's offset, and you can always find the time anywhere on Earth.

UTC is the global time reference; all other zones are UTC ± offset
Why time zones exist — Earth rotates 15° per hour, so noon tracks the Sun

2. Success Criteria

By the end, you should be able to:

UTC is the global time reference; all other zones are UTC ± offset
AWST = UTC+8; ACST = UTC+9:30; AEST = UTC+10
Daylight saving adds 1 hour: AEDT = UTC+11, ACDT = UTC+10:30

3. Key Terms

UTCthe anchor — know a city's offset, and you can always find the time anywhere on Earth

Sydneyin summer, London is in winter — no daylight saving in the UK

time zoneahead of (+) or behind (−) UTC

Calculate what time itin one city given the time in another

timeahead of (+) or behind (−) UTC; e

Area and perimetercalculated using the same formula

4. Activity: Build the Lesson Map

Use the lesson to complete the table. Keep answers brief but specific.

Prompt	Your answer
Main concept
Important example
Common mistake to avoid
How this links to the next lesson

5. Short Answer Questions

1. Explain this lesson goal in your own words: "UTC is the global time reference; all other zones are UTC ± offset". Use one specific example from the lesson.

Band 32 marks

2. Apply this idea to a new example: "AWST = UTC+8; ACST = UTC+9:30; AEST = UTC+10". Show your reasoning clearly.

Band 43 marks

3. Analyse why this idea matters for understanding Time Zones and UTC: "Daylight saving adds 1 hour: AEDT = UTC+11, ACDT = UTC+10:30".

Band 54 marks

6. Extend: Apply the Idea

Band 5/65 marks

A student gives a memorised answer about Time Zones and UTC but does not use evidence or reasoning.

Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.

7. Multiple Choice

1. What is the best first step when answering a question about Time Zones and UTC?

A. Identify the key concept being tested

B. Write every fact from memory

C. Ignore the command word

D. Skip examples and evidence

2. Which answer would show stronger understanding of Time Zones and UTC?

A. An answer with accurate terms and reasoning

B. A copied definition only

C. A single-word response

D. An answer with no example

3. What should you do if a question asks you to explain?

A. Link the idea to a reason or cause

B. List unrelated facts

C. Only draw a diagram

D. Write the shortest possible answer

8. Success Criteria Proof

Finish with evidence that you can do each success criterion.

Success criterion 1

Prove that you can: UTC is the global time reference; all other zones are UTC ± offset