Energy Review Unit Test Practice PDF

ENERGY REVIEW UNIT TEST PRACTICE  SPECIFIC HEAT CAPACITY DEPENDS ON MASS. SPECIFIC HEAT CAPACITY OF ALUMINIUM IS 0.902 J/g/C Specific heat for 2gm of aluminium= 0.902 x 2 =1.804J/C So more the mass of substance, more energy will be required to raise the tempera...

ENERGY REVIEW UNIT TEST PRACTICE  SPECIFIC HEAT CAPACITY DEPENDS ON MASS. SPECIFIC HEAT CAPACITY OF ALUMINIUM IS 0.902 J/g/C Specific heat for 2gm of aluminium= 0.902 x 2 =1.804J/C So more the mass of substance, more energy will be required to raise the temperature (slow heating/ cooling) QUESTION: 1 If you were shooting a bow and arrow, which two of the following steps would produce the most elastic energy? 1. Bending the bow 2. Aiming the arrow 3. Loading the arrow 4. Pulling the string back 5. Releasing the arrow QUESTION : 2 Just after the rocket’s engine is lit, a surge of kinetic energy is transferred to it that sends it skywards. Where was the kinetic energy transferred to the rocket form? 1. Electromagnetic potential energy 2. Chemical potential energy of the rocket fuel 3. Spring mechanism in the launch platform 4. Gravitational potential energy QUESTION: 3 Which type of heat transfer happens when the central air system (school’s heater) keeps you warm? 1. Convection 2. Conduction 3. Radiation QUESTION: 4 Which type of heat transfer happens when you burn your hand on the stove? 1. Convection 2. Conduction 3. Radiation QUESTION:5 An object that transfers heat and electricity is a(n) _____ and an object that keeps heat and electricity from transferring is called a(n) _______. QUESTION: 6 Which type of heat transfer is used when a hair dryer is used to dry hair? 1. Conduction 2. Convection 3. Radiation QUESTION:7 Which type of heat transfer happens when you get a sunburn during a baseball game? 1. Conduction 2. Convection 3. radiation QUESTION: 8 If a girl holds a ball at waist level and then lifts the ball above her head and holds it there, which of the following is she doing? 1. Increasing the ball’s potential energy 2. Decreasing the ball’s potential energy 3. Decreasing the ball’s magnetic energy 4. Increasing the ball’s kinetic energy QUESTION: 9 The type of potential energy related to an object’s height 1. Elastic potential energy 2. Gravitational potential energy 3. Mechanical potential energy 4. Stagnate potential energy QUESTION: 10 A student has a toy Ferris Wheel that moves when placed in sunlight. Which best describes the energy transformation that moves the Ferris Wheel? 1. Solar —> electrical—-> Mechanical 2. mechanical—> electrical—> potential 3. Solar —-> mechanical —> chemical 4. Potential —-> Electrical —--> Chemical QUESTION: 11 The potential energy associated with objects that can be stretched or compressed is 1. Gravitational 2. Electromagnetic 3. Elastic 4. kinetic QUESTION: 12 Which of the following energy transformations happens when a student uses the calories from breakfast to walk to school? 1. Chemical to light 2. Chemical to mechanical 3. Electrical to chemical 4. Mechanical to chemical QUESTION: 13 The law of conservation of energy state that _____ can not be ______ nor destroyed, it just changes ______. QUESTION:14 A small car is travelling at a speed of 60mph on the highway. In the next lane, a large passenger bus is travelling at the same speed. Which has more kinetic energy? Explain. QUESTION: 15 What is the unit for measuring energy? 1. Newtons 2. Joules 3. Watts 4. Volts QUESTION: 16 A hair dryer converts 1. Electrical energy to chemical energy 2. Electrical energy to thermal energy 3. Chemical energy to mechanical energy 4. Thermal energy into mechanical energy QUESTION: 17 A 1500 gram textbook and a 5 gram pencil are dropped from the exact same height. Which object has the MOST kinetic energy just before it hits the floor? 1. The pencil because it has less mass 2. The pencil because it’s moving faster 3. The book because it has more mass 4. The book because it has more volume QUESTION: 18 Which is the best example of chemical potential energy? 1. A book resting on a shelf 2. A stretched rubber band 3. A fuel tank containing gasoline 4. A pencil falling off a table QUESTION: 19 The higher the specific heat of a substance, the _____ ( more time / less time / same time) it takes for that object to register a change in temperature. QUESTION: 20 When does a rubber band, which has been shot at a wall, have the most potential energy? 1. When it hits the wall 2. When it is lying on the floor 3. When it is flying across the room 4. When it is stretched ready to shoot at the wall QUESTION: 21 A battery powers an alarm in a toy. Which is an energy transformation that takes place in this device? 1. Electrical to sound to kinetic 2. Kinetic to sound to chemical 3. Chemical to electrical to sound 4. Sound to chemical to electrical QUESTION: 22 A burning candle changes _____ (gravitational / nuclear / chemical / elastic ) energy into ______( gravitational / electrical / potential / heat) QUESTION: 23 According to the Law of Conservation of Energy, which of the following is true about the energy in a system? 1. Total potential energy = Total kinetic energy 2. Total potential energy = Theoretical potential energy 3. Total kinetic energy = mechanical + thermal energy 4. Total mechanical energy = chemical + kinetic energy QUESTION: 24 Potential energy increases as 1. Kinetic increases 2. Mass and height increases 3. Speed and mass increases 4. Potential increases QUESTION: 25 A wind turbine converts 1. Potential energy to electrical energy 2. Kinetic energy to potential energy 3. Chemical energy to kinetic energy 4. Mechanical energy to electrical energy QUESTION: 26 A bowling ball, baseball, golf ball and ping pong ball are all rolling down a bowling lane at the same speed. Which one has the most kinetic energy? 1. Bowling ball 2. Baseball 3. Golf ball 4. Ping pong ball QUESTION: 27 Which energy transformation takes place in a car engine? 1. Chemical to thermal 2. Thermal to mechanical 3. Chemical to thermal to mechanical 4. Thermal to mechanical to chemical QUESTION: 28 What is a force that opposes motion between two surfaces that are touching? 1. Friction 2. Kinetic energy 3. Nuclear fission 4. Electrical energy QUESTION: 29 The lower the specific heat of a substance, the _____(more time / less time / same time) it takes for the object to register a change in temperature. QUESTION: 30 Solar calculators contain a battery that can be recharged using natural or artificial light. 1. Is this an open or closed system? Explain 2. What energy transformations are taking place?