Small Whale · Reading worksheet
Purple Earth hypothesis
High school (ages 12+)
Environment & Earth
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/purple-earth-hypothesis
Step 2 · Questions
1. How big is Purple Earth hypothesis?
2. What is the hypothesis proponent?
3. What is the proposed pigment for early photosynthesis?
Step 3 · Words to know
Write what each word means, using the article.
Porphyrin-based chlorophyll
Isoprenoid lipids
Great Oxygenation Event
Archean eon
Step 4 · Two facts in your own words
Do not copy the article. Write two things you learned, the way you would explain them to a friend.
1.
2.