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61 Cards in this Set
- Front
- Back
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What question can NOT be answered by science?
a. How do birds fly? b. Is this a good song? c. What is an atom? d. How does a clock work? |
b. Is this a good song? |
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Which of the following is an example of an SI unit?
a. foot b. second c. pound d. gallon |
b. second |
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On one-thousandth is expressed by which prefix?
a. kilo- b. nano- c. centi- d. milli- |
d. milli- |
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Which of the following is SI based on?
a. inches b. powers of five c. English units d. powers of ten |
d. powers of ten |
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What is the symbol for deciliter?
a. dL b. dcL c. dkL d. Ld |
a. dL |
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Which of the following is NOT a derived unit?
a. dm 3 b. m c. cm 3 d. g/ml |
b. m |
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Which of the following is NOT equal to 1,000 mL?
a. 1 L b. 100 cL c. 1 dm 3 d. 1 cm 3 |
d. 1 cm 3 |
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Which of the following do you calculate when you divide the total distance traveled by the total travel time?
a. average speed b. constant speed c. variable speed d. instantaneous speed |
a. average speed |
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Which term below best describes the forces on an object with a net force of zero?
a. inertia b. balanced forces c. acceleration d. unbalanced forces |
b. balanced forces |
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Which of the following is a proper unit of acceleration?
a. s/km 2 b. km/h c. m/s 2 d. cm/s |
c. m/s 2 |
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Which of the following is not used in calculating acceleration?
a. initial velocity b. average speed c. time interval d. final velocity |
b. average speed |
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In which of the following conditions does the car NOT accelerate?
a. A car moves at 80 km/h on a flat, straight highway b. The car slows from 80 km/h to 35 km/h c. The car turns a corner d. The car speeds up from 35 km/h to 80 km/h |
a. A car moves at 80 km/h on a flat, straight highway |
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What is the tendency for an object to resist any change in its motion called?
a. net force b. acceleration c. balanced force d. inertia |
d. inertia |
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How can speed be defined?
a. acceleration/ time b. change in velocity/ time c. distance/ time d. displacement/ time |
c. distance/ time |
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What is the gravitational force exerted on an object called?
a. centripetal force b. friction c. momentum d. weight |
d. weight |
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Which of the following best describes why projectiles move in a curved path?
a. They have horizontal velocity and vertical acceleration b. They have momentum c. They have mass d. They have weight |
a. They have horizontal velocity and vertical acceleration |
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Which of the following explains why astronauts seem weightless in orbit?
a. Earth's gravity is much less in orbit b. The space shuttle is in free fall c. The gravity of Earth and the Sun cancel d. The centripetal force on the shuttle balances Earth's gravity |
b. The space shuttle is in free fall |
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Which of the following exerts the strongest gravitational force on you?
a. the Moon b. Earth c. the Sun d. this book |
c. the Sun
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The graph shows the speed of a car moving in a straight line. Over which segments are the forces on the car balanced?
a. A and C b. B and D c. C and E d. D only |
b. B and D |
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Which of the following is true about an object in free fall?
a. Its acceleration depends on its mass b. It has no inertia c. It pulls on Earth, and Earth pulls on it d. Its momentum is constant |
c. It pulls on Earth, and Earth pulls on it |
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The acceleration of an object is in the same direction as which of the following?
a. net force b. air resistance c. static friction d. gravity
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a. net force |
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Which of the following is NOT a force?
a. weight b. friction c. momentum d. air resistance |
b. friction |
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What occurs when energy is transferred from one object to another?
a. an explosion b. a chemical reaction c. nuclear fusion d. a change |
d. a change |
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For which of the following is kinetic energy converted into potential energy?
a. a boulder rolls down a hill b. a ball is thrown upward c. a swing comes to a stop d. a bowling ball rolls horizontally |
b. a ball is thrown upward |
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The gravitational potential energy of an object changes when which of the following changes?
a. the object's speed b. the object's mass c. the object's temperature d. the object's length |
b. the object's mass` |
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Friction causes mechanical energy to be transformed into which of these forms?
a. thermal energy b. nuclear energy c. kinetic d. potential |
a. thermal energy |
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The kinetic energy of an object changes when which of the following changes?
a. the object's chemical potential energy b. the object's volume c. the object's direction of motion d. the object's speed |
d. the object's speed |
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When an energy transformation occurs, which of the following is true?
a. Mechanical energy doesn't change b. Mechanical energy is lost c. The total energy doesn't change d. Mass is converted into energy |
c. the total energy doesn't change |
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Using the scientific definition, which of the following is true of work?
a. It is difficult b. It involves levers c. It involves a transfer of energy d. it is done with a machine |
c. It involves a transfer of energy |
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How many types of simple machines exist?
a. three b. six c. eight d. ten |
b. six |
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In an ideal machine, which of the following is true?
a. Work input is equal to work output b. Work input is greater than work output c. Work input is less than work output d. The IMA is always equal to one |
a. Work input is equal to work output |
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Which of these is not done by a machine?
a. multiply force b. multiply energy c. change direction of a force d. work |
b. multiply energy |
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What term indicates the number of times a machine multiplies the input force?
a. efficiency b. power c. mechanical advantage d. resistance |
c. mechanical advantage |
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How could you increase the IMA of an inclined plane?
a. increase its length b. increase its height c. decrease its length d. make its surface smoother |
a. increase its length |
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In a wheel and axle, which of the following usually exerts the output force?
a. the axle b. the wheel c. the fulcrum d. the input arm |
a. the axle |
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What is the IMA of a screwdriver with a shaft radius of 3 mm and a handle radius of 10 mm?
a. 0.3 b. 3.3 c. 30 d. 13
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b. 3.3 |
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What is the IMA of an inclined plane that is 2.1 m long and 0.7 m high?
a. 0.3 b. 2.8 c. 1.5 d. 3.0 |
d. 3.0 |
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Which of the following increases as the efficiency of a machine increases?
a. work input b. work output c. friction d. IMA |
b. work output |
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Which is NOT a method of heat transfer?
a. conduction b. specific heat c. radiation d. convection |
b. specific heat |
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In which of the following devices is fuel burned inside chambers called cylinders?
a. internal combustion engine b. radiator c. heat pump d. air conditioner |
a. internal combustion engine |
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During which phase of a four-stroke engine are waste gases removed?
a. power stroke b. intake stroke c. compression stroke d. exhaust stroke |
d. exhaust stroke |
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Which of the following materials is a poor insulator of heat?
a. iron b. feathers c. air d. plastic |
a. iron |
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Which of the following devices is an example of a heat mover?
a. solar panel b. refrigerator c. internal combustion engine d. diesel engine |
b. refrigerator |
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Which term describes the measure of the average kinetic energy of the particles in an object?
a. potential energy b. thermal energy c. temperature d. specific heat |
c. temperature |
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Which of these is NOT used to calculate change in thermal energy?
a. volume b. temperature change c. specific heat d. mass |
a. volume |
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Which of the following processes does NOT require the presence of particles of matter?
a. radiation b. conduction c. convection d. combustion |
a. radiation |
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Which of the following is the name for thermal energy that is transferred only from a higher temperature to a lower temperature?
a. potential energy b. kinetic energy c. heat d. solar energy |
c. heat |
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Which of the following do waves carry?
a. matter b. energy c. matter and energy d. the medium |
b. energy |
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What is the formula for calculating wave speed?
a. v = wavelength x f b. v = f - wavelength c. v = wavelength/ f d. v = wavelength + f |
a. v = wavelength x f |
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When a compressional wave travels through a medium, which way does the matter in the medium travel?
a. backward b. forward c. perpendicular to the rest position d. along the same direction the wave travels |
d. along the same direction the wave travels |
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What is the highest point of a transverse wave called?
a. crest b. compression c. wavelength d. trough |
a. crest |
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If the amplitude of a wave changes, which of the following changes?
a. wave energy b. frequency c. wave speed d. refraction |
a. wave energy |
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Which type of electromagnetic wave is the most energetic?
a. gamma rays b. ultraviolet waves c. infrared waves d. microwaves |
a. gamma rays |
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Electromagnetic waves can behave like what type of particle?
a. electrons b. molecules c. photons d. atoms |
c. photons |
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Which type of electromagnetic wave enables skin cells to produce vitamin D?
a. visible light b. ultraviolet waves c. infrared waves d. X rays |
b. ultraviolet waves |
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Which of the following describes X rays?
a. short wavelength, high frequency b. short wavelength, low frequency c. long wavelength, high frequency d. long wavelength, low frequency |
a. short wavelength, high frequency |
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Which of the following is changing in an AM radio wave?
a. speed b. frequency c. amplitude d. wavelength
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a. frequency |
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Which type of electromagnetic wave has wavelengths greater than about 1 mm?
a. X rays b. radio waves c. gamma rays d. ultraviolet waves |
b. radio waves |
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What is the name of the ability of some materials to absorb ultraviolet light and emit it as visible light?
a. modulation b. handoff c. transmission d. fluorescence |
d. fluorescence |
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Which of these colors of visible light has the shortest wavelength?
a. blue b. green c. red d. white |
a. blue |
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Which type of electromagnetic wave has wavelengths slightly longer than humans can see?
a. X rays b. ultraviolet waves c. infrared waves d. gamma rays |
c. infrared waves |
