Question

In the kiln, quicklime reacts with other minerals to make clinker. When hot clinker comes out of the kiln, it flows like lava! As clinker cools, it forms small marble-sized gray balls. Clinker is then ground to a fine powder and mixed with a substance called gypsum to make cement.

small, gray marble-sized clinker
Complete the sentences.
When heated in a kiln,
reacts with minerals to form
. Then,
is added to the cooled powder to make cement.

Answer 1

When heated in a kiln, **quicklime** reacts with minerals to form **clinker**. Then, **gypsum** is added to the cooled powder to make cement.