Seconds, minutes, hours
The second is the SI unit of time.
How long is a minute?
Prerna's coach times her 100 metre race in seconds. A film is timed in minutes. A school day is timed in hours.
How many seconds do you think make a minute?
What this lesson covers
The idea
The SI unit of time is the second (s); larger units are the minute (min) and hour (h), with 60 s = 1 min and 60 min = 1 h.
How long is a minute?
Prerna's coach times her 100 metre race in seconds. A film is timed in minutes. A school day is timed in hours.
How many seconds do you think make a minute?
- 60
- 10
- 100
Fill the dials
Slide the seconds round to 60. Then slide the minutes round to 60.
Sixty and sixty
The seconds dial filled up at 60 s, which is 1 min. The minutes dial filled up at 60 min, which is 1 h.
The SI unit of time is the second (s); larger units are the minute (min) and hour (h), with 60 s = 1 min and 60 min = 1 h.
- Unit | Symbol | Relation
- Second | s | SI unit
- Minute | min | 60 s = 1 min
- Hour | h | 60 min = 1 h
Notes
The SI unit of time is the second (s); larger units are the minute (min) and hour (h), with 60 s = 1 min and 60 min = 1 h.
Check yourself
What is the SI unit of time?
How many seconds are there in 1 minute?
Answer: 60 s
60 s = 1 min.
How many minutes are there in 1 hour?
Answer: 60 min
60 min = 1 h.
How many seconds are there in 2 minutes?
Answer: 120 s
2 × 60 s = 120 s.
- The second — correct. Yes!
- The minute. The minute is a larger unit. The SI unit is the second.
- The hour. The hour is a larger unit. The SI unit is the second.