odometer
They move a short period of time because hopping is tiring to the legs
they dont have periods.
Short
An instrument consisting of a short pendulum with a sliding weight. It is set in motion by clockwork, and serves to measure time in music.
The sundial
Timepieces.
Geologic time consists of eons, eras, periods, epochs, and ages. These measure periods of billions or millions of years.
Pulse-modulation
Do you mean like a watch?
The common instrument used to measure time is a clock. Clocks come in various forms such as analog clocks, digital clocks, and atomic clocks, all of which are designed to accurately measure and display time.
An accelerometer is an instrument to measure acceleration, which is the change in velocity per unit of time.
You can leave responsible children alone for short periods of time, but not overnight. Children at the age of 12 can be left at home for short periods of time.