Understanding Time Units

Hours

• A unit of time equal to 60 minutes
• Divided into 60 minutes, with each minute consisting of 60 seconds
• 24 hours in a day, with 12 hours in the morning (AM) and 12 hours in the evening (PM)

Minutes

• A unit of time equal to 60 seconds
• 1 minute is equal to 1/60 of an hour
• Often used to measure short periods of time or intervals

Seconds

• A unit of time equal to 1/60 of a minute
• The smallest unit of time in the modern system
• Often used to measure very short periods of time or intervals

Time Zones

• Regions on Earth that follow a uniform standard time
• Determined by the Earth's rotation and longitude
• Time zones are usually offset from Coordinated Universal Time (UTC) by a whole number of hours

Time Systems

• There are several time systems, including:
  1. 12-hour clock: uses AM and PM to distinguish between morning and evening
  2. 24-hour clock: uses a continuous numbering system from 0 to 23
  3. Julian Day: a system used in astronomy to measure time in days since a fixed starting point

Time Units

• 1 hour is equal to 60 minutes
• 1 minute is equal to 60 seconds
• 1 day consists of 24 hours, divided into 12 hours in the morning (AM) and 12 hours in the evening (PM)

Conversions

• 1 minute is equal to 1/60 of an hour
• 1 second is equal to 1/60 of a minute

Time Zones

• Time zones are regions on Earth that follow a uniform standard time
• Time zones are determined by the Earth's rotation and longitude
• Time zones are usually offset from Coordinated Universal Time (UTC) by a whole number of hours

Time Systems

12-Hour Clock

• Uses AM and PM to distinguish between morning and evening

24-Hour Clock

• Uses a continuous numbering system from 0 to 23

Julian Day

• A system used in astronomy to measure time in days since a fixed starting point