Spain army soldiers help disinfect Madrid hospital

The video provides a brief introduction to the topic, setting the stage for further learning.

What is the basic unit of time measurement?

• Hour

• Minute

• Day

• Second

Why is one second important in timekeeping?

• It is the longest unit of time.

• It is the standard unit for measuring time intervals.

• It is irrelevant in daily life.

• It is used only in scientific experiments.

Which of the following is a practical use of one second?

• Measuring the length of a day

• Timing a sprint race

• Calculating the age of the universe

• Determining the duration of a year

How does one second relate to other units of time?

• It is equivalent to an hour.

• It is a fraction of a minute.

• It is shorter than a millisecond.

• It is longer than a minute.

In what context is one second most commonly used?

• In determining the length of a century

• In calculating the lifespan of stars

• In measuring geological time scales

• In everyday activities like cooking and sports