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Student Name: ______________________________ Mrs. Lee – 8th Grade Physical Science Period #: ______ Page 1 Chapter 11 Practice Test ______ ______ 1) Which of the following is an example of a force? a) water b) other fluids c) gravity 2) A fluid can be ______. a) a gas only b) a liquid only d) mass c) a solid or a gas d) a liquid or a gas ______ 3) The velocity of an object is ______. a) its standard reference point b) the rate of change of its position c) the process of speeding it up d) its change in direction ______ 4) Earth’s gravity pulls you down with a force ______. a) greater than your weight b) the size of your feet c) equal to your weight d) half your weight ______ 5) Which of the following is NOT the SI unit of pressure? a) N / m2 b) Pa c) Newton d) Pascal ______ 6) Pressure is ______. a) force x area b) area force c) force + area d) force area ______ 7) At higher elevations, air pressure is ______. a) less because there is less air above b) greater because there is more air below c) less because gravity is stronger d) less because the air is moving faster ______ 8) When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called ______. a) Pascal’s principle b) Newton’s principle c) Archimedes’ principle d) Bernoulli’s principle ______ 9) An object under water feels lighter than it does in air because of ______. a) air pressure b) buoyancy c) fluid speed d) temperature ______ 10) An object is dropped into a beaker containing a liquid. The object drops to the bottom of the beaker. Therefore, the ______. a) density of the object is greater than the density of the liquid. b) Density of the object is less than the density of the liquid. c) Mass of the object is less than the mass of the liquid. d) Volume of the liquid displaced is more than the volume of the object. ______ 11) If you blow a steam of air between two balloons that are next to each other, the balloons ______. a) rise b) move away from each other c) move toward each other d) move randomly ______ 12) Air above an airplane wing is moving faster than air below an airplane wing. This causes the plane to ______. a) accelerate b) slow down c) increase its elevation d) decrease its elevation Ch 11 Practice Test 1 Student Name: ______________________________ Mrs. Lee – 8th Grade Physical Science Period #: ______ Page 2 Chapter 11 Practice Test ______ 13) Fluids exert pressure because they are made up of tiny ______. a) moving molecules that exert forces b) forces that sum together c) molecules that push upward d) particles that are buoyant ______ 14) Bubbles rise in water because they are ______. a) so tiny b) less dense than water c) more dense than water d) fluids ______ 15) A fluid is a substance whose volume can easily change. a) True b) False ______ 16) Water pressure increases as depth increases. a) True b) False ______ 17) The buoyant force always acts in an upward direction. a) True b) False ______ 18) Archimedes’ principle states that the buoyant force on an object is equal to the mass of the fluid displaced by the object. a) True b) False ______ 19) The density of an object would be changed by changing the object’s volume or its area. a) True b) False ______ 20) What is the SI unit for pressure? a) pascal (Pa) b) newton (N) c) kilogram (kg) 21) Pressure is ______. a) force x area b) force area c) force + area ______ ______ 22) At higher elevations, there is ______ air pressure. a) the same b) greater c) less ______ 23) As a diver moves deeper in the water, the fluid pressure is ______. a) the same b) greater c) less ______ 24) Objects in water feel lighter because of the ______ a) buoyant force b) air pressure c) temperature ______ 25) An object sinks in a bucket of water. The object’s density is ______. a) less than water’s density b) the same as water’s density c) greater than water’s density Ch 11 Practice Test 2 Student Name: ______________________________ Mrs. Lee – 8th Grade Physical Science Period #: ______ Page 3 Chapter 11 Practice Test ______ 26) A force on a confined fluid changes the pressure all through the fluid. This is ______. a) Pascal’s principle b) Archimedes’ principle c) Bernoulli’s principle ______ 27) A hydraulic system uses fluid to ______. a) cause acceleration b) decrease air pressure c) multiply force ______ 28) As the speed of a moving fluid increases, the fluid pressure ______. a) decreases b) stays the same c) increases ______ 29) What force pushes up on an airplane wing as it moves through the air? a) gravity b) lift c) air resistance ______ 30) Water pressure increases as depth increases. a) True b) False ______ 31) Air pressure is measured using a barometer. a) True b) False ______ 32) The buoyant force acts in a downward direction. a) True b) False ______ 33) The buoyant force on an object is equal to the weight of the fluid the object displaces. a) True b) False ______ 34) Archimedes’ principle explains how an airplane flies. a) True b) False Use the diagram below to answer the following 2 questions: ______ ______ 35) Classifying: This device is a ______. a) barometer b) hydraulic system c) buoyant force 36) Applying Concepts: This device uses fluid to multiply force. Which principle explains why this device works? a) Pascal’s principle b) Archimedes’ principle c) Bernoulli’s principle Ch 11 Practice Test 3 Student Name: ______________________________ Mrs. Lee – 8th Grade Physical Science Period #: ______ Page 4 Chapter 11 Practice Test Use the diagram below to answer the following 3 questions: ______ 37) Interpreting Diagrams: The ship and the steel block have the same weight. Why does the ship float while the steel bock sinks? a) The ship displaces more water b) There is less gravity on the ship c) There is no air pressure on the ship ______ 38) Applying Concepts: Which principle explains why the ship floats and the steel block sinks? a) Pascal’s principle b) Archimedes’ principle c) Bernoulli’s principle ______ 39) Applying Concepts: What does the buoyant force on each object in the diagram equal? a) the weight of the object b) the weight of the water displaced by the object c) the weight of the air pressing down on the object Ch 11 Practice Test 4