Metric Time Measurement

Name:

Date:

⏱️ Part 1: Metric Time Units

1. How many milliseconds are in 1 second?

100 milliseconds

1000 milliseconds

10,000 milliseconds

100,000 milliseconds

2. Convert 3.5 seconds to milliseconds.

3.5 seconds = _________ milliseconds

3. Which of these would be measured in milliseconds? (Select all that apply)

The time it takes to blink your eye

A school lesson

Computer processing speed

A weekend holiday

4. Express 2 minutes and 350 milliseconds as decimal seconds.

🚌 Part 2: Timetables and Elapsed Time

5. A bus leaves Auckland at 9:15 AM and arrives in Hamilton at 11:42 AM. Calculate the journey time in:

a) Hours and minutes: _____ hours _____ minutes

b) Decimal hours: _____ hours

c) Total minutes: _____ minutes

6. A sprinter runs 100 metres in 12.47 seconds. Express this time in:

a) Milliseconds: _________ ms

b) Minutes (as a decimal): _________ minutes

7. Why is precise time measurement important in modern technology?

🔬 Part 3: Real-World Applications

8. A scientific experiment measures reaction times. The results are: 0.245 seconds, 0.198 seconds, and 0.267 seconds.

a) Convert each time to milliseconds:

0.245 s = _____ ms 0.198 s = _____ ms 0.267 s = _____ ms

b) Calculate the average reaction time in seconds: _________ seconds

9. GPS satellites need extremely precise timing to work accurately. If a GPS signal is delayed by just 1 microsecond (0.000001 seconds), explain why this could cause problems for navigation.

10. Challenge: A computer processor operates at 3.2 gigahertz (3.2 billion cycles per second). How many nanoseconds (billionths of a second) does each cycle take?