photon

"There is a countless number of stars."

"My grandmother's lifetime of experience made her a valuable advisor. "

"Sunlight is made of tiny particles called photons. "

"She regarded us warily."

"She was carrying a heavy backpack to school. "

"The student received a small quantum of extra credit for participating in class. "

"an indefinitely determined fossil"

"a government with three discrete divisions"

"The scientist studied the tiny particle of dust. "

"We had to sit in the dark because the electric was cut off."

"The cell phone emits electromagnetic waves that allow us to communicate. "

"Sunlight on the skin gives you vitamin D."