Photothermal ratio

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/photothermal-ratio

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 scientific classification?A quantitative variable characterizing plant growth environment
2. What is the core components?Ratio of light availability (photo) to temperature level (thermal)
3. Why do plants need both light and warmth?Light powers photosynthesis, and warmth speeds up the enzymes that help plants grow. Together they keep plants healthy.
4. How does a high or low photothermal ratio affect a plant?A high ratio means plenty of light and good temperatures, so plants can grow strong. A low ratio means not enough light or too hot/cold, which can stress plants.

Photothermal Ratio (PTR): A metric quantifying the balance between light energy and thermal energy available to plants.
Photosynthesis: The biochemical process by which plants convert light energy into chemical energy (sugars).
Ecophysiology: The study of how physiological processes of organisms are influenced by their environment.
Photoinhibition: A process where excessive light energy damages the photosynthetic apparatus in plants.