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According to the passage, the way time is usually measured shows that the time is ________.

1) measured in comparison to other periods
2) measured using a standard unit
3) measured based on the rotation of the Earth
4) measured using a clock

User Zyxue
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Final answer:

Time is measured using standardized units like the second, despite traditional methods that used astronomical observations. Today, mechanical and electronic clocks enable precise measurement and tracking of time intervals.

Step-by-step explanation:

The measurement of time is fundamentally connected to the rotation of Earth. Traditionally, time has been measured in comparison to other periods, specifically with reference to the positions of the Sun and stars. However, the most widely recognized and standardized method of measuring time today uses the SI unit for time, which is the second (s). This unit is used with devices such as pendulums and clocks that provide an accurate measurement of time intervals. Therefore, while we have historical methods based on astronomical observations, modern measurements of time rely on standardized units and instruments like clocks to measure the passage of time.

User Klew
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