A trip to the local clock shop reminds everyone in Huckle's class how important clocks are for our everyday lives.

Bill explains how we measure time and mentions some of the tools we use to measure it. He notes that time measurements, such as days, months, and years, are based on astronomical events and uses a motion machine to illustrate the Earth's revolution around the Sun and the Moon's revolution around the Earth.

Missy Franklin is an Olympic swimmer. Her height and long limbs allow her to maximize thrust and overcome drag, two important elements in moving fast through water.

On a date, Einstein discusses how it would become possible for time to stand still, and discovers the theory of relativity.

Dr. Shini Somara introduces physics and the concept of motion in a straight line, or one dimension. She defines key terms such as time, position, velocity, and acceleration then provides real-world scenarios involving these concepts to make them more concrete.