Orders of magnitude (time)

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/orders-of-magnitude-time

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 Planck time?Planck time is the tiniest possible unit of time, about 10^-44 seconds. It is the time light takes to travel the Planck length, the smallest distance we know.
2. How old is the universe?The universe is about 13.8 billion years old. That's 1.38 × 10^10 years since the Big Bang.

Order of Magnitude: A classification of the magnitude of a number, typically expressed as a power of ten.
Planck Time: The smallest unit of time in which current physical theories are understood to have meaning.
Astronomical Julian Year: A standardized unit of time equal to 365.25 days, used for long-term scientific measurements.
Big Bang: The prevailing cosmological model for the universe's earliest known periods and its subsequent large-scale evolution.