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Understanding the Concept of Time and Its Invention

Fun Fact: Time isn’t something you can see or touch. You can only tell that time passes because other things change.

Understanding the Concept of Time and Invention

What Is Past, Present, And Future?

  • Time that is past has happened already. You know when your week is over. The time of last week is past.
  • Time that is present is what is happening right now. As you are sitting or standing reading this, you are in the present.
  • The future is time that has not happened yet. You know when you are looking forward to your birthday. That time is in the future.

Keeping Track of Time

Since ancient times, people used the rising and setting of the Sun to tell time. They needed to know when it would be light and when it would be dark. The Sun looks as if it goes across the sky, but that’s because Earth is turning. The Sun stays still. When the Sun rises, it is daytime. When the Sun sets, it is nighttime. When the Sun is at its highest point in the sky, it is noon, halfway through the day.

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People also used the seasons to tell time long ago. They knew that there was winter and summer. They needed to know when to plant crops and when to gather food for the winter.

People also studied how the Sun moved across the sky. They used the Sun to tell when summer began. They called the time it takes to go from one summer to another a year. They counted up the number of days that made up a year and came up with numbers close to 365.

Fun Fact: Ancient people also saw that the Moon seems to change shape in a cycle that lasts 29 days. They called this time a month.

Who Invented Clocks?

The Chinese may have invented the first ticking clock about 1,000 years ago. Europeans had clocks about 800 years ago. Over time, the clocks got better. They kept time more accurately. Clocks also got smaller. Watches are small clocks you can wear on your wrist.

After electricity was discovered, inventors learned how to make electric clocks. They learned how to make watches that use batteries.

How Did People Learn to Tell Time?

Ancient Babylonians in the Middle East may have been the first people to divide a day into 24 hours. They invented the sundial around 2000 BC to tell the passing of the hours during daylight. A sundial is a disk with a triangle-shaped piece sticking up in the middle. The triangle casts a shadow that moves around the sundial’s disk as the Sun moves across the sky. The Babylonians put markings on the disk to show where the shadow would be each hour.

People also used hourglasses to tell time. An hourglass has two containers with a narrow connection between them. They watched how long it took for water or sand to pour from one container to another.

People learned to divide hours into minutes. There are 60 minutes in an hour. Eventually, they divided minutes into seconds. There are 60 seconds in 1 minute.

Is Time the Same All Over Earth?

Hours, minutes, and seconds are the same amount of time anywhere on Earth. But Earth is divided into 24 time zones. There is a one-hour difference between each time zone and the one next to it. In the time zone east of the one you live in, it is one hour later. In the time zone to the west, it is one hour earlier.

Know something about Time that we don’t? Share in the comment box below

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