Annum

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/annum

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 is the astronomical definition?The period of Earth's revolution around the Sun, approximately 365.2422 days
2. What is the etymological origin?From the Latin 'annus', meaning 'year'
3. What is an "annum" and why is it important?An "annum" is the Latin word for a year, the time it takes Earth to go once around the Sun—about 365 days. It helps us keep track of seasons and plan our lives.
4. Why do we use calendars like the Julian and Gregorian?Early calendars based on the moon drifted with the seasons. The Julian calendar added a more accurate solar year, and the Gregorian calendar fixed the remaining errors so our days stay in sync with the Sun.

Revolution: The movement of one celestial body around another, like Earth around the Sun.
Axial Tilt: The angle between an object's rotational axis and its orbital plane, causing seasons.
Chronometry: The science of accurate time measurement.