Three children have gathered with their teacher Ms.Stephens in the SCIENCE area. On the table Ms.Stephens has three raw eggs. She shows one of the raw eggs to the children and asks, “How could you break this egg?” The children give the following responses. George says, “I would drop it on the floor.” Tina says, “I would hit it on the table.” Alonzo says, “I would squeeze it real hard with my hand.” Ms. Stephens then gives George an egg and encourages him to test his suggestion. George drops the egg onto the floor and it breaks. Ms. Stephens asks George, “Why do you think the egg broke?” George responds, “Because the ground was hard.”
The story illustrates the scientific concept of______________.