WONDER #317: How Do You Color Glass?

Question 1 of 3

A finely-ground mixture of sand and scraps of broken or waste glass is called what?

1. glass
2. cullet
3. junk glass
4. molten oxide

Question 2 of 3

How hot does a furnace need to be in order to make glass?

1. 290° F
2. 2,900° F
3. 29,000° F
4. 290,000° F

Question 3 of 3

What is the secret ingredient for making colored glass?

1. colored dye
2. peroxide
3. chlorine bleach
4. metal oxides

Check your answers online at https://wonderopolis.org/wonder/how-do-you-color-glass.