CLEAN : LONG PROFILE: Former Malaysian Prime Minister Najib Razak

What is the primary unit of time that helps us understand the passage of time?

• Day

• Hour

• Minute

• Second

How is a second defined in terms of its measurement?

• By the rotation of the Earth

• By the phases of the moon

• By the movement of the sun

• By the vibration of cesium atoms

Which of the following is a common use of seconds in everyday life?

• Measuring the length of a day

• Timing a race

• Calculating the age of the universe

• Determining the distance to the moon

Why are seconds important in scientific research?

• They determine the speed of light

• They are used in precise timekeeping and experiments

• They are used to measure the weight of objects

• They help in predicting weather patterns

In what context is the accuracy of a second most crucial?

• Astronomical observations

• Cooking recipes

• Painting a picture

• Reading a book