History of timekeeping devices

High school (ages 12+)
Mathematics & Numbers

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/history-of-timekeeping-devices

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What were the first devices people used to measure time?People first used sundials, which track the sun's shadow, and water clocks, which measure time by the steady flow of water between vessels.
2. How did ancient Egyptians keep track of time?Around 1200 BC, Egyptians used sundials and water clocks to measure time based on the sun and water flow.

Gnomon: The part of a sundial that casts a shadow onto the dial face.
Escapement: A mechanical linkage that controls the release of energy in a clock or watch.
Isochronism: The property of a pendulum where its period of oscillation is constant regardless of amplitude.
Longitude: The angular distance, east or west, of a point on the Earth's surface from the Greenwich meridian.