silicas

"The school science project involved identifying different rocks based on the minerals they contained, like quartz and feldspar. "

"Suzanne collected all the papers she had laid out."

"Glass is made from silicate. "

"The chemistry experiment showed that carbon dioxide, a gas we exhale, contains two oxygen atoms for every carbon atom. "

"My family has a different ideal for my future than I do. "

"The editor composed a historical journal from many individual letters."

"The box containing my old toys was stored in the attic. "

"The reasons are various."

"The geologist studied the rocks in the park. "

"The computer chip contains silicon, a key element for its operation. "

"a blood sample"

"The students were mostly quiet during the presentation. "