Spores
Spores are tiny seed-like cells that mold and fungi release to spread and grow in new places.
A bag of flour sits open on the counter. When you scoop it, a cloud of white dust floats into the air and drifts across the kitchen. Each tiny bit lands on a new surface. Spores work the same way. A fungus sends out a cloud of tiny cells that float, land, and grow in new spots.
Explaining spores by grade level
Mold on bread makes dust-like bits you can barely see. Those bits float through the air to new places. When they land on damp food, new mold starts to grow. Each tiny bit is called a spore.
Projects that explore spores
Spores are tiny seed-like particles that start growing when conditions are right. In this experiment, you collect dust on a cotton swab and rub it on bread. You add water and wait for mold to appear.
When spores from blue mold (Penicillium) or gray mold (Botrytis cinerea) reach a fruit surface, they can grow into fungal colonies that damage the harvest. Here, forty red D'Anjou pears are punctured and inoculated with mold spores, then treated with a chlorine dip, a zinc oxide solution, a vegetable oil wipe, or a plain water dip as the control. After fourteen days at room temperature, each pear is rated on a visual mold scale from 1 to 10, revealing which treatment most effectively reduces blue and gray mold.