Archaean

High school (ages 12+)
Science & Technology

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/archaean

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 dominant life forms?Prokaryotes, including early bacteria and archaea
2. What is the atmospheric composition?Primarily nitrogen, carbon dioxide, methane; very low free oxygen

Lithosphere: The rigid outer part of the Earth, consisting of the crust and upper mantle.
Prokaryote: A single-celled organism lacking a nucleus and other membrane-bound organelles.
Photosynthesis: The process by which light energy is converted into chemical energy, typically by plants and algae, releasing oxygen.
Banded Iron Formations (BIFs): Distinctive sedimentary rocks composed of alternating layers of iron-rich minerals and silica-rich minerals, formed in ancient oceans.