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Lesson 3: Time

# Telling time (labeled clock)

Learn about how to tell time using an analog clock. It covers identifying the hour and minute hands, understanding the concept of hours and minutes, and reading the clock to determine the time. See multiple examples to demonstrate the process of telling time. Created by Sal Khan.

## Want to join the conversation?

• Why do we have different time lines all over the world?
• The world is round, which means the sun cannot hit all points of the Earth at the same time. When it might be day for you, it is night for somebody on the other side of the Earth, because the sun is unable to reach that point on the planet. Times are adjusted according to where the sun is currently able to light the Earth.
• Why does the 12 on the clock mean and zero minutes?
• Because the shows that the 60 minute cycle is complete and it begins again
• In parallel universe, could there be 100 minutes in an hour instead of 60?
• Certainly, and we could have it in our universe too. For example the french attempted that with French Revolutionary Time.

Copied from Wikipedia: " French Revolutionary Time divided the day into 10 decimal hours, each decimal hour into 100 decimal minutes and each decimal minute into 100 decimal seconds"

They were not the only ones. There have been many such examples throughout history.
• Is there a reason for the one that goes around faster then the other ones?
• yeah because the smaller one counts the hours and the bigger one counts the minutes
• Why does the analog clock have hands but digital clock have no hands.
• Analog clocks use moving hands pointing at fixed numbers to represent hours and minutes in a 12-hour format. Digital clocks show minutes and hours as moving numbers and so no hands are needed to point the numbers out. Digital clocks can also show time in 24-hour format.
• how does the little hand go faster
• because it is designed for minutes which there are 60 of in a hour so when the hour hand is at a new number the minute hand has moved 60 times
• Why do you have to put like for an example why do you need to put a 0 before the five? Could you just do ?
• If you put , you mean: two hours and FIFTY minutes
If you put , you mean: two hours and FIVE minutes

50 isn't the same thing of 5, so you couldn't
• How do you tell time on a sundial?
• it's like a normal clock face but there is a stick in the middle so that a shadow is cast by the sun as the stick works as an hour hand
• The long Hand points at 2 and the little hand points at 9 so at the clock is AM