Cartesian Diver Lab Report
Do the Cartesian Diver Lab.
What is the relationship between the density of an object and its buoyancy in a fluid?
Use Prentice Hall Physical Science copyright 1988 page 342.
Fill the eye dropper with some water rather than use wire.
Report Option 1:
Write answers for Observations 1-2 and Conclusions 1-5 in a well written paragraph.
Underline and number each answer.
Report Option 2:
Explain the Cartesian Diver in a well written paragraph using all of the following terms: Use the terms fluid, pressure, buoyancy (or buoyant force), density, Archimedes’ Principle, Pascal’s
Principle, hydraulic device (or hydraulic system), and gravity. Underline each term the first time it is used.

Report Option 1:
Write answers for Observations 1-2 and Conclusions 1-5 in a well written paragraph.
Underline and number each answer.
Observations
1. What happens to the dropper when the sides of the bottle are squeezed?
2. What happens to the dropper when the sides of the bottle are released?
Conclusions
1. What happens to the pressure of the water when you squeeze the sides of the bottle?
2. When you squeeze the bottle, some of the water is pushed up into the dropper. Why?
3. Why does the dropper sink when you squeeze the sides of the bottle?
4. Why does the dropper rise when you release the sides of the bottle?
5. How is the density of an object related to its buoyancy in a fluid?

Report Option 2:
Explain the Cartesian Diver in a well written paragraph using all of the following terms: Use the terms fluid, pressure, buoyancy (or buoyant force), density, Archimedes’ Principle, Pascal’s
Principle, hydraulic device (or hydraulic system), and gravity. Underline each term the first time it is used.
For Pascal’s Principle and hydraulic system, see “Hydraulic devices use the principle that pressure is transmitted equally in all directions throughout a liquid.” on pages 336-341.