Current location - Training Enrollment Network - Early education courses - Truth is born after a hundred question marks. What are the "question marks" in three concrete examples? What is the truth discovered from this?
Truth is born after a hundred question marks. What are the "question marks" in three concrete examples? What is the truth discovered from this?
(Swirl of bath water) Professor Xie Piluo discovered that it is related to the rotation of the earth.
(Color change of violet) Boyle, a famous British chemist, found that acid and alkali will change color when dripping on flowers and plants.
An Austrian doctor found that people are dreaming when they roll their eyes while sleeping.