Glass Quiz: Clearly Brilliant

6 questions on how glass is made, where nature makes its own and the glass people use every day.
- Questions
6 - Length
About 4 min
Spoiler: show the questions 6 questions
- What is the main ingredient of ordinary window and bottle glass?
- These rough tubes of natural glass were dug out of sand. What made them?
- Which material is natural volcanic glass?
- Sort these moments in the history of glass, earliest first.
- How hot does pure sand have to get before it melts?
- When a car windshield cracks, what keeps it in one piece?