Term
As a ship is unloaded, it rises higher in the water because the density of the ship and its remaining cargo
increases. |
|
Definition
|
|
Term
| Hydraulic systems use two pistons with different surface areas to lift heavy objects. |
|
Definition
|
|
Term
Wind blowing across the top of a chimney helps to draw air up the chimney. This is an example of
Bernoulli’s principle. |
|
Definition
|
|
Term
| As an airplane wing moves, air moves faster above the wing than below it. |
|
Definition
|
|
Term
| In a stationary fluid, the buoyant force is exerted equally in all directions |
|
Definition
|
|
Term
| The air pressure at an altitude of 3 km is less than the air pressure at 1 km |
|
Definition
|
|
Term
| Water pressure is due to the weight of the water above a particular point. |
|
Definition
|
|
Term
| More force is required to lift an object in water than on land because of the buoyant force of the water |
|
Definition
|
|
Term
Bernoulli’s principle states that the buoyant force acting on a submerged object is equal to the weight of the
fluid the object displaces. |
|
Definition
|
|
Term
10. A substance whose shape can easily change is a
a. solid.
b. powder.
c. fluid.
d. metal. |
|
Definition
|
|
Term
11. A material that can easily flow is called a
a. fluid.
b. solid.
c. buoyant force.
d. hydraulic material. |
|
Definition
|
|
Term
12. Air pressure decreases as
a. velocity increases.
b. elevation increases.
c. acceleration decreases.
d. gravity increases. |
|
Definition
|
|
Term
13. Water pressure increases as
a. depth increases.
b. gravity decreases.
c. force decreases.
d. acceleration increases. |
|
Definition
|
|
Term
14. A barometer is used to measure pressure
a. in the atmosphere.
b. under water.
c. in hydraulic systems.
d. under a snowshoe. |
|
Definition
|
|
Term
15. Which of the following is true of the buoyant force?
a. It acts in the downward direction.
b. It acts with the force of gravity.
c. It acts in the upward direction.
d. It makes an object feel heavier. |
|
Definition
|
|
Term
16. Snowshoes enable a person to walk on deep snow because the snowshoes
a. decrease the person’s weight on the snow.
b. increase the area over which the person’s weight is distributed.
c. increase the pressure on the snow.
d. increase the buoyancy of the person. |
|
Definition
|
|
Term
17. A unit of pressure is called a
a. bernoulli.
b. pascal.
c. pound.
d. meter |
|
Definition
|
|
Term
18. Pressure can be measured in units of
a. newtons.
b. newtons per square meter.
c. newtons per centimeter.
d. newtons per cubic centimeter. |
|
Definition
|
|
Term
19. Given that the air pressure outside your body is so great, why aren’t you crushed?
a. Human skin is extremely strong.
b. Earth’s gravity cancels out the air pressure.
c. Pressure inside your body balances the air pressure outside your body.
d. Inertia changes the pressure before it comes into contact with you. |
|
Definition
|
|
Term
20. What effect does a buoyant force have on a submerged object?
a. It causes the object to sink in a fluid.
b. It causes a net force acting upward on the object.
c. It causes the object to move sideways in a fluid.
d. It causes a net force acting downward on the object. |
|
Definition
|
|
Term
21. A ship stays afloat as long as the buoyant force is
a. less than the ship’s weight.
b. equal to the ship’s weight.
c. less than the ship’s speed.
d. greater than the ship’s speed. |
|
Definition
|
|
Term
22. When water fills a submarine’s flotation tanks, the overall density of the submarine
a. decreases.
b. stays the same.
c. increases.
d. reduces the buoyant force |
|
Definition
|
|
Term
23. The mass per unit volume of a substance is its
a. density.
b. buoyancy.
c. weight.
d. fluid pressure. |
|
Definition
|
|
Term
24. An object that is more dense than the fluid in which it is immersed will
a. sink.
b. rise.
c. neither rise nor sink.
d. sink at first, than rise slowly |
|
Definition
|
|
Term
25. Which of these substances is the LEAST dense?
a. wood
b. copper
c. mercury
d. rubber |
|
Definition
|
|
Term
26. The braking system on a car is an example of
a. a hydraulic system.
b. buoyancy.
c. Bernoulli’s principle.
d. Newton’s third law of motion. |
|
Definition
|
|
Term
27. Which type of substance does Pascal’s principle deal with?
a. solids
b. fluids
c. powders
d. metals |
|
Definition
|
|
Term
28. One application of Pascal’s principle is
a. a hydraulic car lift.
b. the flight of an airplane.
c. a speedboat’s bottom slapping against the waves.
d. the buoyancy shown by ducks and other waterfowl |
|
Definition
|
|
Term
29. What scientific rule describes why water squirts from a plastic bottle when it is squeezed?
a. Bernoulli’s principle
b. Archimedes’ principle
c. Pascal’s principle
d. Newton’s first law of motion |
|
Definition
|
|
Term
30. What scientific rule states that the buoyant force on an object is equal to the weight of the fluid displaced by
the object?
a. Archimedes’ principle
b. Pascal’s principle
c. Bernoulli’s principle
d. Newton’s third law of motion |
|
Definition
|
|
Term
31. Which of these multiplies a force by transmitting it to a large surface area?
a. a hydraulic system
b. a buoyant force
c. a balanced pressure
d. a force pump |
|
Definition
|
|
Term
32. Bernoulli’s principle helps to explain
a. hydraulic brakes.
b. buoyancy.
c. momentum.
d. flight. |
|
Definition
|
|
Term
33. When force is applied to a confined fluid, an increase in ____________________ is transmitted equally to all
parts of the fluid.
A. buoyancy B. density C. pressure |
|
Definition
|
|
Term
34. When you squeeze on a bottle with a closed top, the change in pressure is transmitted
____________________ to all parts of the fluid.
A. equally B. not equally C. none of the above |
|
Definition
|
|
Term
35. According to Bernoulli’s principle, the pressure in a moving stream of fluid is ____________________ than
the pressure of the surrounding fluid.
A. higher B. lower C. none of the above |
|
Definition
|
|
Term
36. During high winds, the windows in a building may bulge outward because the air pressure inside the building
is ____________________ than the air pressure outside the building.
A. lower B. higher |
|
Definition
|
|
Term
37. An eagle can glide through the air on a windy day thanks in part to ____________________ principle.
A. Newton’s B. Pascal’s C. Bernoulli’s |
|
Definition
|
|
Term
38. The unit of pressure is called the _______________________.
A. Newton B. Pascal C. Newton |
|
Definition
|
|
Term
Water pressure ____________________ with depth.
A. decreases B. Stays the same C. increases |
|
Definition
|
|
Term
40. A mountain climber might carry oxygen because the air pressure at the top of the mountain is
____________________ than the air pressure at the bottom.
A. more B. the same C. less |
|
Definition
|
|
Term
41 The buoyant force acts in the direction opposite the force of _____________________.
A. gravity B. inertia C. air resistance |
|
Definition
|
|
Term
42. A block of wood is placed in a jar of water. According to Archimedes’ principle, the ____________________
on the block is equal to the weight of the displaced fluid.
A. buoyant force B. newton of force C. Jedi force |
|
Definition
|
|
Term
43. The greater the portion of a tennis ball beneath the surface of a liquid, the ____________________ the
buoyant force on the ball.
A. greater B. less C. same |
|
Definition
|
|
Term
44. Chocolate syrup sinks in milk because chocolate syrup is more ____________________ than milk.
A. massive B. dark in color C. dense |
|
Definition
|
|
Term
45. A wooden block floats both in water, which has a density of 1.0 g/cm
3
, and in corn oil, which has a density of
1.38 g/cm
3
.____________________ Less of the wooden block will be submerged in the .
A. corn oil B. water |
|
Definition
|
|
Term
46. When the block was placed in the liquid in container A, the level of the liquid rose. Why?
A. The block displaced some of the liquid B. The block is too heavy C. It’s magic |
|
Definition
|
|
Term
47. In what direction is the buoyant force acting on the block in container A?
A. downward B. sideways C. upward |
|
Definition
|
|
Term
48. How is the buoyant force related to the displaced liquid in container A?
A. The weight of the displaced liquid equals the buoyant force on the block.
B. The weight of the displaced liquid does not equal the buoyant force on the block. |
|
Definition
|
|
Term
49. Compare the buoyant force on the block in container B with the weight of the block.
A. The buoyant force is less than the weight of the block.
B. The buoyant force is not less than the weight of the block.
C. The buoyant force is equal to the weight of the block. |
|
Definition
|
|
Term
50. The fluids in both containers are identical, and both blocks are the same size. Therefore, what can we
conclude about the densities of the blocks?
A. The density of the block in contain B is less than the block in container A.
B. The density of the block in contain B is equal to the block in container A.
C. The density of the block in contain B is greater than the block in container A. |
|
Definition
|
|
