Problem: Randomly generate a fact.

Random fact: a pulley is used to lift a flag on a flagpole

Problem: Randomly generate a fact.

Random fact: as the smoothness of something increases , the friction of that something will decrease when its surface moves against another surface

Problem: Randomly generate a fact.

Random fact: usually plants die or become dormant during the winter

Problem: Randomly generate a fact.

Random fact:
shelter can protect humans from weather