Reading Comprehension Related

Review Reading Comprehension related questions and content

Glass
I wonder who first discovered glass. This commodity has been a part of civilization from the very beginning. Imagine a world without glass! How dark and dismal it would be. No windows, corrective lenses, telescopes, microscopes, cameras, sparkly drinking containers or mirrors. Life would not be the same without this wonderful discovery. Thank you, whoever found glass!
Glass is not an element, but a combination of several elements. It is a hard, brittle, transparent solid material composed mainly of silica, with additives to change the character of the glass. Common additives are soda, lime, lead, and boron. Each additive changes the properties of the final product. Soda and lime are the most common additives, accounting for about 90% of glass production. Adding lead increases reflectivity, causing the glass to "sparkle." The addition of boron changes the thermal and electrical properties of glass, allowing cookware that can be used in the oven without shattering.

What is the definition of 'brittle'?

  • A. Flexible and resilient
  • B. Easily broken
  • C. Hard and fragile
  • D. Tough and sturdy
Correct Answer: B

Rationale: The correct definition of 'brittle' is being 'easily broken,' making choice B the correct answer. Brittle materials are prone to breaking, cracking, or shattering when subjected to stress or pressure. In the context of glass, being described as 'brittle' means that it can break easily without much deformation or flexibility, unlike materials that are tough or resilient. Therefore, understanding the properties of materials like glass, including its brittleness, is crucial in various applications and industries.