 # Chapter 5 & 6 Review

`Honors Physical Science Chapter 5 & 6 Exam Review`
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`True/False`
`Indicate whether the statement is true or false.`
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`____ 1.         Energy doesn't have to involve motion.`
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`____ 2.         Energy is the ability to cause change.`
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`____ 3.         Energy is measured in joules.`
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`____ 4.         When you ride a playground swing, your potential energy is greatest at the highest point.`
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`____ 5.         Chemical energy travels from the Sun to Earth and is transformed into light energy by plants.`
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`____ 6.         As mass decreases, kinetic energy increases.`
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`____ 7.         Lowering an object decreases its potential energy.`
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`____ 8.         In a car engine, burning fuel produces heat, which causes gases to expand, producing kinetic energy.`
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`____ 9.         The sum of potential and kinetic energy in a system is called the total energy.`
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`____ 10.       As an object falls its potential energy is lost to the air around it.`
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`____ 11.       Carbohydrates and fats provide our bodies with energy in the form of calories.`
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`____ 12.       Energy from the Sun and energy from food are just different forms of the same thing.`
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`____ 13.       When a machine is used to do work, the force applied by the machine is called the effort force.`
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`____ 14.       Under certain conditions, it is possible to get more work out of a machine than you put into it.`
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`____ 15.       Some machines don't multiply the force that is applied to them.`
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`____ 16.       Examples of all three classes of levers are found in the human body.`
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`____ 17.       In order for work to be done on a object, the object must move.`
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`Modified True/False`
`Indicate whether the statement is true or false.  If false, change the identified word or phrase to make the statement true.`
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`____ 18.       Energy in the form of motion is potential energy. _________________________`
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`____ 19.       According to the law of conservation of energy, mechanical energy can be changed to heat energy. _________________________`
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`____ 20.       A rock at the edge of a cliff has kinetic energy because of its position. _________________________`
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`____ 21.       When you put on the brakes of a bicycle, friction causes some of the mechanical energy to change to thermal energy. _________________________`
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`____ 22.       According to the law of conservation of energy, energy can be created or destroyed. _________________________`
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`____ 23.       Energy that is stored is kinetic energy. _________________________`
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`____ 24.       Energy stored in food you eat is chemical potential energy. _________________________`
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`____ 25.       Elastic energy is the total potential and kinetic energy in a system. _________________________`
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`____ 26.       Energy is measured in joules. _________________________`
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`____ 27.       Compression energy is stored in a stretched rubber band. _________________________`
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`____ 28.       A book sitting on a shelf has gravitational potential energy. _________________________`
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`____ 29.       Power is work done over a distance. _________________________`
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`Multiple Choice`
`Identify the choice that best completes the statement or answers the question.`
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`____ 30.       The kinetic energy of an object increases as its ____ increases.`
 `a.` `gravitational energy` `c.` `specific heat` `b.` `potential energy` `d.` `velocity`
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`____ 31.       Increasing the speed of an object ____ its potential energy.`
 `a.` `does not affect` `c.` `decreases` `b.` `increases` `d.` `changes`
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`____ 32.       The SI unit for energy is the ____.`
 `a.` `calorie` `c.` `meter per second` `b.` `joule` `d.` `kilogram`
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`____ 33.       You can calculate kinetic energy by using the equation ____.`
 `a.` `KE (J) = m (kg) ´ 9.8 m/s2 ´ h (m)` `c.` `KE (J) = 1/2 m (kg) ´ v2 (m2/s2)` `b.` `KE (J) = w (m) ´ h (m)` `d.` `KE (J) = 9.8 m/s2 ´ 1/2 m (kg)`
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`____ 34.       You can calculate gravitational potential energy by using the equation ____.`
 `a.` `GPE (J) = 1/2m (kg) ´ 1/2h (m)` `c.` `GPE (J) = h (m) ´ 9.8 m/s2` `b.` `GPE (J) = m (kg) ´ 9.8 m/s2 ´ h (m)` `d.` `GPE (J) = 1/2h (m) ´ w (m)`
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`____ 35.       Which of the following devices does not make use of electrical energy?`
 `a.` `upright piano` `c.` `toaster` `b.` `radio` `d.` `digital camera`
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`____ 36.       A bus engine transfers chemical potential energy into ____ so that the bus moves.`
 `a.` `thermal energy` `c.` `electrical energy` `b.` `gravitational potential energy` `d.` `kinetic energy`
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`____ 37.       In a nuclear fusion reaction, mass is transformed into ____.`
 `a.` `matter` `c.` `energy` `b.` `nuclei` `d.` `light`
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`____ 38.       According to the law of conservation of energy, the total amount of energy in the universe ____.`
 `a.` `remains constant` `c.` `increases` `b.` `changes constantly` `d.` `decreases`
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`____ 39.       The unit of power is the ____.`
 `a.` `joule` `c.` `m/s` `b.` `watt` `d.` `second`
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`Completion`
`Complete each statement.`
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`         40.       If an object has energy, this means that the object has the ability to cause ____________________.`
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`         41.       If you double the velocity of an object, you increase its kinetic energy by a factor of ____________________.`
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`         42.       Stored energy is called ____________________ energy.`
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`         43.       A fire warms you by transferring ____________________ energy.`
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`         44.       On a swing your potential and kinetic energies change, but your ____________________ energy does not.`
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`         45.       According to the law of conservation of energy, energy can change ____________________, but it cannot be created or destroyed under ordinary conditions.`
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`         46.       When you move your hand or foot, your body has converted potential energy into ____________________ energy.`
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`         47.       You can determine how much energy various foods can give you by checking their ____________________ content.`
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`         48.       Work, like energy, is measured in ____________________.`
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`Problem`
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`         49.       An 18-kg bicycle carrying a 62-kg girl is traveling at a speed of 7 m/s. What is the kinetic energy of the girl and bicycle?`
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`         50.       A 20-kg bicycle carrying a 50-kg girl is traveling at a speed of 8 m/s. What is the kinetic energy of the girl and bicycle?`
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`         51.       A 70-kg boy is sitting 3 m from the ground in a tree. What is his gravitational potential energy?`
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`         52.       A 90-kg ceiling light is suspended 4 m above the floor. What is its gravitational potential energy?`
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`Honors Physical Science Chapter 5 & 6 Exam Review`
`Answer Section`
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`TRUE/FALSE`
` `
`        1.                   ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.1 CS3.1`
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`        2.                   ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        3.                   ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.3 CS3.1`
` `
`        4.                   ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        5.                   ANS:  F                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        6.                   ANS:  F                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.1 CS3.1`
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`        7.                   ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.1 CS3.1`
` `
`        8.                   ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        9.                   ANS:  F                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.1 CS3.1`
` `
`        10.                 ANS:  F                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        11.                 ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
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`        12.                 ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.2`
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`        13.                 ANS:  F                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/1      STA:              PS1.2 CS2.1`
` `
`        14.                 ANS:  F                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/1      STA:              PS1.2 CS2.1`
` `
`        15.                 ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/1      STA:              PS1.2 CS2.1`
` `
`        16.                 ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge II`
`OBJ:                      3/1      STA:              PS1.2 CS2.1`
` `
`        17.                 ANS:  T                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS2.1`
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`MODIFIED TRUE/FALSE`
` `
`        18.                 ANS:  F, kinetic`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/3`
`STA:                      PS1.1 CS3.1`
` `
`        19.                 ANS:  T                                                     PTS:   1          DIF:     Webb's Depth of Knowledge I`
`OBJ:                      2/3      STA:              PS1.1 CS3.1`
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`        20.                 ANS:  F, potential`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/1`
`STA:                      PS1.1 CS3.1`
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`        21.                 ANS:  T                                                     PTS:   1          DIF:     Webb's Depth of Knowledge I`
`OBJ:                      2/1      STA:              PS1.1 CS3.1`
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`        22.                 ANS:  F, cannot`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/3`
`STA:                      PS1.1 CS3.1`
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`        23.                 ANS:  F, potential`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/1`
`STA:                      PS1.1 CS3.1`
` `
`        24.                 ANS:  T                                                     PTS:   1          DIF:     Webb's Depth of Knowledge I`
`OBJ:                      1/3      STA:              PS1.1 CS3.1`
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`        25.                 ANS:  F, mechanical`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/2`
`STA:                      PS1.1 CS3.1`
` `
`        26.                 ANS:  T                                                     PTS:   1          DIF:     Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.1 CS3.1`
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`        27.                 ANS:  F, Elastic potential`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/3`
`STA:                      PS1.1 CS3.1`
` `
`        28.                 ANS:  T                                                     PTS:   1          DIF:     Webb's Depth of Knowledge I`
`OBJ:                      1/3      STA:              PS1.1 CS3.1`
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`        29.                 ANS:  F, time`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/4`
`STA:                      PS1.2 CS2.1`
` `
`MULTIPLE CHOICE`
` `
`        30.                 ANS:  D                   PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        31.                 ANS:  A                   PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.2 CS3.1`
` `
`        32.                 ANS:  B                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/1      STA:              PS1.3 CS3.1`
` `
`        33.                 ANS:  C                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/2      STA:              PS1.3 CS3.1`
` `
`        34.                 ANS:  B                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/4      STA:              PS1.3 CS3.1`
` `
`        35.                 ANS:  A                   PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/1      STA:              PS1.2 CS3.1`
` `
`        36.                 ANS:  D                   PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/1      STA:              PS1.2 CS3.1`
` `
`        37.                 ANS:  C                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/3      STA:              PS1.3 CS3.1`
` `
`        38.                 ANS:  A                   PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      2/3      STA:              PS1.2 CS3.1`
` `
`        39.                 ANS:  B                    PTS:   1                    DIF:    Webb's Depth of Knowledge I`
`OBJ:                      1/4      STA:              PS1.2 CS2.1`
` `
`COMPLETION`
` `
`        40.                 ANS:  change`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/1`
`STA:                      PS1.2 CS3.1`
` `
`        41.                 ANS:  four`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/1`
`STA:                      PS1.2 CS3.1`
` `
`        42.                 ANS:  potential`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/1`
`STA:                      PS1.2 CS3.1`
` `
`        43.                 ANS:  thermal`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/1`
`STA:                      PS1.2 CS3.1`
` `
`        44.                 ANS:  mechanical`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/2`
`STA:                      PS1.2 CS3.1`
` `
`        45.                 ANS:  form`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/3`
`STA:                      PS1.2 CS3.1`
` `
`        46.                 ANS:  kinetic`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/1`
`STA:                      PS1.2 CS3.1`
` `
`        47.                 ANS:  calorie`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    2/1`
`STA:                      PS1.2 CS3.1`
` `
`        48.                 ANS:  joules`
` `
`PTS:                       1         DIF:               Webb's Depth of Knowledge I       OBJ:    1/2`
`STA:                      PS1.2 CS2.1`
` `
`PROBLEM`
` `
`        49.                 ANS:  `
`1/2 mv2 = 1/2 (18 + 62)(7)2 = 1,960 J`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge II      OBJ:    1/2`
` `
`        50.                 ANS:  `
`1/2 mv2 = 1/2 (20 + 50)(8)2 = 2,290 J`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge II      OBJ:    1/2`
` `
`        51.                 ANS:  `
`(m)(9.8)(h) = (70)(9.8)(3) = 2,058 J`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge II      OBJ:    1/4`
` `
`        52.                 ANS:  `
`(m)(9.8)(h) = (90)(9.8)(4) = 3,528 J`
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`PTS:                       1         DIF:               Webb's Depth of Knowledge II      OBJ:    1/4`