Harford Community College Physical Science I (SCI 105)
Test 2 Sample Questions
1. Water pressure is greatest against the ______ of a submerged object.
a. top b. bottom c. sides d. its the same
2. A dam is thicker at the bottom because ...
a. water is denser at deeper levels b. water pressure is greater deeper
c. surface tension d. none of these
3. Pressure in a liquid depends on ...
a. depth b. liquid density c. both a and b d. neither
4. A completely submerged object always displaces its own ...
a. volume b. weight c. density d. a,b, and c
5. The buoyant force acting on a 10 ton floating ship is ...
a. < 10 tons b. > 10 tons c. 10 tons
6. A rock weighs 5 N in air and 3 N in water. The buoyant force in water is ...
a. 8 N b. 5N c. 3N d. 2 N
7. Ice cubes at the bottom of a liquid indicate that ...
a. there is no buoyant force b. the ice is denser than the liquid
c. the crystal structure has broken down d. the ice contains air bubbles
8. Two identical containers are filled with water. One has a piece of wood floating on the top.
The weight of the bucket of water alone is __________ the weight of the other bucket.
a. the same as b. less than c. greater than
9. A block of styrofoam floats on water while a block of lead of the same size is submerged and
resting on the bottom. The buoyant force is ...
a. greater on the lead
b. greater on the styrofoam
c. the same for both
10. Atmospheric pressure is caused by the ________ of the atmosphere.
a. density b. weight c. temperature
11. A rising helium-filled balloon will become ...
a. larger b. more dense c. heavier d. none of these
12. The density of water at the bottom of the ocean is _______ the density at the surface.
a. greater than b. less than c. the same as
