CLEAN: Argentina: passengers return to train station after deadly crash

What is the primary unit of time that helps us measure short durations?

• Minute

• Hour

• Millisecond

• Second

How is a second defined in terms of atomic properties?

• By the flow of water

• By the vibration of cesium atoms

• By the orbit of the moon

• By the rotation of the Earth

Which of the following is NOT a common use of seconds?

• Timing a race

• Cooking recipes

• Scientific experiments

• Measuring long distances

Why are seconds important in scientific experiments?

• They provide a standard unit for precise measurements

• They are easier to calculate than minutes

• They are used to measure temperature

• They are the only unit of time

In what context might you use seconds in everyday life?

• To calculate annual expenses

• To time a short workout

• To determine the age of a tree

• To measure the length of a movie