The clock is a very old invention. Sundials were used in ancient times.
Sundials work by measuring shadows that are cast by the sun. Candle
clocks were used a very long time ago. Candle clocks work by measuring
the time it takes for the wax to melt. Hourglasses are similar to candle
clocks because they also measure the time it takes for something to happen.
Hourglasses work by measuring the time it takes for sand to pour through
a small opening into a glass. Mechanical clocks appeared in the 13th
century in Europe. They work with a system of moving gears. The gears
always move at the same speed. Pendulum clocks work with a swinging
weight. The swinging weight is called pendulum. The pendulum makes
the clock parts move. Now people typically use mechanical clocks or
digital clocks. Digital clocks show numbers on a screen. The numbers
represent the time. Some people use auditory clocks. Auditory clocks use
language to tell the time aloud. Computers also use clocks. Computers
use internal clocks in order to work properly. In today's world, clocks are
everywhere - in homes, schools, offices, and public places. Many people
live their lives according to the clock. People go to work and return home
according to the clock. School days start and end according to the clock.
Airplanes take off and land according to the clock. It is fun to imagine a
world without clocks!
1. What were the different types of clocks used in ancient times?
2. How is time measured using a candle clock?
3. What is the advantage of a mechanical clock?
4. What kind of a clock would you suggest for a blind person?
5. Why does the author say that it is fun to imagine a world without clocks?
No comments:
Post a Comment