Question

use the text to put the events in order.
most glass is made from a combination of melted sand and other materials. sand only melts at very high temperatures. for this reason, glassmakers usually add washing soda to sand before they heat it. this mixture has a lower melting point than sand alone. after the mixture is heated to its melting point, glass is created. the glassmaker then shapes it into whatever its final form will be. the glass is still hot at this point, though, so it needs to be cooled. cooling the glass slowly will result in stronger finished glass.
cool the mixture. shape the mixture. add washing soda to sand. heat the mixture to its melting point.

Explanation:

The text describes the process of making glass. First, glassmakers add washing soda to sand. Then, they heat the mixture to its melting point. After that, they shape the mixture. Finally, they cool the mixture.

Answer:

1. Add washing soda to sand.
2. Heat the mixture to its melting point.
3. Shape the mixture.
4. Cool the mixture.