Shade (shadow)

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/shade-shadow

Step 2 · Questions

1. 1. What is the physical principle?

2. 2. What is the historical application?

Step 3 · Words to know

Write what each word means, using the article.

• Rectilinear Propagation

• Umbra and Penumbra

• Passive Solar Design

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.