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Choose the best answer to each question and write the appropriate letter in the space provided. 9) Which geometrical shape has the least surface area for a given volume? A) cube B) pyramid C) cylinder D) sphere 10) If the volume of an object were to double while its mass stayed the same, its density would __________. A) halve B) double C) stay the same 11) Which has the greater density, 5 kg of silver or 10 kg of steel? A) The silver B) The steel C) They both have the same density Choose the best answer to each question and write the appropriate letter in the space provided. 12) The reason falling heavy objects hit the ground faster than falling light objects is that heavy objects (remember, Gravity pulls ALL objects at 9.8 m/s2)__________. A) accelerate faster than light objects. B) have more air resistance. C) have a smaller ratio of surface area to weight. D) all of the above 13) The reason an iron ship doesn't sink is that __________. A) iron is less dense than water B) the iron displaces more water than it would if it were in a solid block C) air inside decreases it's weight D) Nonsense -- an iron ship will always sink 14) There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely? A) This is impossible because of the large size of the Atlantic Ocean. B) The force on his finger would have been huge, but the pressure very small. C) The force on his finger would have been less than 1 N. D) Both the force and pressure on his finger would have been very large. 15) Suppose a stone weighs 3 N in the air, but in water it weighs only 2 N. What is the buoyant force acting on the stone? A) 5 N B) 4 N C) 3 N D) 2 N E) 1 N © Prentice Hall, Inc. Page 2
Choose the best answer to each question and write the appropriate letter in the space provided. 16) If an object has a density equal to the density of water, it will __________. A) float B) sink C) neither float nor sink 17) If the part of an iceberg that extends above the water were removed, the __________. A) iceberg would sink. B) iceberg would rise higher in the water. C) density of the iceberg would change. D) pressure on the bottom of the iceberg would increase. 18) When first put in water, a plastic toy boat will sink until __________. A) it displaces a volume of water equal to its own volume B) it displaces a weight of water equal to its own weight C) the water density equals the density of the boat D) the buoyant force equals the volume of the boat 19) Pressure in a liquid depends on the __________. A) density of the liquid. B) volume of the liquid. C) mass of the liquid. D) depth of the measuring point. E) both A and D 20) If an object has a density greater than the density of water, it will __________. A) float B) sink C) neither float nor sink 21) When a boat sails from fresh water to salt water, the boat will float __________. A) lower in the salt water B) higher in the salt water C) at the same level 22) When you float in salt water compared to floating in fresh water, the buoyant force that supports you is __________. A) greater B) less C) the same 23) An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, one can conclude that __________. A) calcium in the eggshell is repelled by sodium chloride. B) the density of salt water exceeds the density of egg. C) buoyant forces do not always act upward. D) salt sinks to the bottom. © Prentice Hall, Inc. Page 3
Page 1: Quiz/Test review - Solid/Liquid/Gas
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