Bernoulli's Principle: as the velocity of a fluid increases, the pressure
exerted by that fluid decreases
Physical Principles in Living Systems (Physical Sciences)
6. Physical principles underlie biological structures and functions. As a basis for understanding
j. Students know that contractions of the heart generate blood pressure and that
heart valves prevent backflow of blood in the circulatory system.
Prior knowledge & experience:
What happens when you blow on a straw?
What will happen to the water when a stream of fast air is blown on top of the straw?
The horizontal straw creates a stream of fast flowing air which creates a low pressure area above the straw placed in the water, this causes the water to rise.
The common misconception is that the only way to draw water with a straw is to suck on the straw.
Photographs and Movies
Liem, L., Tik. (1987). Invitations to Science Inquiry. Chino Hills, CA: Science Inquiry