# Working model of a unit of time using cardboard with explanation

### Unit of Time Introduction:

Time is a fundamental dimension in the measurement of events and durations. It is a concept that helps us understand the sequence of events and the intervals between them.

The unit of time is used to quantify and express these durations.

### Common Units of Time:

1. Second (s):
• The second is the base unit of time in the International System of Units (SI).
2. Minute (min):
• A minute is equal to 60 seconds. It is commonly used for everyday time measurements.
3. Hour (h):
• An hour is equal to 60 minutes or 3,600 seconds. It is a standard unit for measuring longer time intervals.
4. Day (d):
• A day is defined as 24 hours. It is based on the Earth’s rotation on its axis.
5. Week:
• A week consists of seven days, providing a convenient unit for organizing schedules.
6. Month:
• A month is a unit of time associated with the phases of the moon or calendar months. Commonly, months have 28 to 31 days.
7. Year (yr):
• A year is the time it takes for the Earth to complete one orbit around the Sun. It is approximately 365.25 days.

Specialized Units:

• Nanosecond (ns):
• One billionth of a second.
• Microsecond (μs):
• One millionth of a second.
• Millisecond (ms):
• One thousandth of a second.
• A decade is a period of ten years.
• Century:
• A century is a period of one hundred years.

### working model of a unit of time making

Creating a working model of a unit of time using cardboard can be a fun and educational project.

Below is a simple project to create a timeline model representing different units of time:

## Materials:

1. Cardboard
2. Ruler
3. Pencil
4. Craft knife or scissors
5. Markers or colored pencils
6. String or yarn
7. Small pegs or clips
8. Paper or cardstock for labels
9. Glue or tape
10. Hole punch

## Step by Step Working Model Working model of a unit of time:

1. Cut the Base:
• Cut a long strip of cardboard to serve as the base of your timeline. The length of the strip will depend on how many units of time you want to represent.
2. Divide the Timeline:
• Use a ruler to divide the timeline into equal segments, each representing a different unit of time (seconds, minutes, hours, days, weeks, months, years, etc.).
3. Label Each Segment:
• Write the name of the unit of time on each segment of the timeline using markers or colored pencils.
4. Create Labels:
• Cut small pieces of paper or cardstock to create labels for each unit of time. Write additional information about each unit, such as abbreviations or conversions.