Unbreakable glass

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/unbreakable-glass

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 material classification?Engineered glass and glass substitutes with enhanced fracture toughness and impact resistance
2. What is the primary strengthening mechanisms?Surface compression via thermal or chemical tempering; interlayer adhesion in laminated glass
3. What is super strong glass?Super strong glass is specially treated or layered glass that can resist breaking from everyday bumps and drops.
4. How do scientists make glass that doesn't break?They use tempering, which cools or changes the surface to create a compressive stress, and lamination, which adds a plastic layer that stops cracks from spreading.

Fracture Toughness: A measure of a material's resistance to fracture when a crack is present.
Residual Stress: Stresses that remain within a material after processing, affecting its mechanical properties.
Polyvinyl Butyral (PVB): A common polymer interlayer used in laminated safety glass for its adhesive and energy-absorbing qualities.