magnesium

"The new math homework was easily understood by the students. "

"$ is the symbol for dollars in the US and some other countries."

"Letters are the elements of written language."

"The fish flashed its silvery scales as it jumped out of the water. "

"The bank's website uses an atomic operation to update account balances. "

"My grandfather uses an alkaline battery in his flashlight. "

"Of course in my opinion Social Studies is more of a science than an art."

"Zero, one, −1, 2.5, and pi are all numbers."

"The teacher gave a demonstration of how to solve quadratic equations. "

"The scientist studied the effects of different types of soil on plant growth. "

"The scientist studied the chemical composition of the soil sample. "

"Gasoline is a flammable. "