spicule

"The astronomer presented a fascinating talk about distant galaxies in our school's science club. "

"The science teacher conducted an experiment to demonstrate how plants grow in different types of soil. "

"The spilled juice contaminated the clean tablecloth, making it unusable. "

"The student used a microscope to see the tiny cells in the plant leaf. "

"The teacher explained the process of reproduction in plants to her class. "

"Many students learn about invertebrates, like insects and worms, in biology class because they are animals without a backbone. "

"The factory's efficient manufacture of toys allowed them to sell many at a low price. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The computer technician fixed the broken printer in the school library. "

"The jeweler carefully inspected each crystalline before setting it in the ring. "

"The birds had built an amazing structure out of sticks and various discarded items."

"Looking through a telescope with a special filter, we can see sunspots on the photosphere of the sun. "