Chronology of the universe

High school (ages 12+)
Space & Astronomy

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/chronology-of-the-universe

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 key early universe epoch?Inflation, occurring between 10^-36 and 10^-32 seconds after the Big Bang
2. What is the current dominant component?Dark Energy, driving accelerated expansion
3. What happened during the Planck epoch?The Planck epoch was the very first instant after the Big Bang, when all forces were together and conditions were extreme. Scientists can only guess about it because it happened so early.
4. Why did the universe expand so fast during cosmic inflation?During cosmic inflation, a special energy field made space grow very quickly, making the universe smooth and flat. This helped create the big structures we see today.

Planck Epoch: The earliest theoretical period of the universe, before quantum gravity is well understood.
Cosmic Inflation: A hypothesized period of extremely rapid expansion in the very early universe.
Big Bang Nucleosynthesis: The process that formed the first light atomic nuclei in the minutes after the Big Bang.
Cosmic Microwave Background (CMB): Relic radiation from the early universe, providing a snapshot of conditions ~380,000 years after the Big Bang.