Energy Quiz: Efficiency & Energy Types

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Energy basics & efficiency

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genevieve

Australia

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Energy Quiz: Efficiency & Energy Types


Froggy Jumps Energy Quiz: Efficiency & Energy TypesVersión en línea Energy basics & efficiency por genevieve 1 What is energy efficiency in a device? a Using less energy to perform the same work b Increasing energy consumption for better output c Storing more energy than needed 2 Useful energy is the portion that does the intended job. What is wasted energy? a Energy that never exists in the system b Energy that increases performance c Energy not used for the desired task 3 Heat energy is also called... a Thermal energy b Electrical energy c Mechanical energy 4 Which statement best defines heat/thermal energy? a Stored energy in chemical bonds b Energy that travels only as waves c Energy of random molecular motion and vibrations 5 Sound energy is energy carried by... a Magnetic fields b Light rays c Sound waves 6 Which example wastes energy? a A light left on in an empty room b A computer in sleep mode c A well-insulated house during winter 7 Heat transfer by direct contact is known as... a Convection b Radiation c Conduction 8 In insulation, reducing heat loss improves... a Sound quality b Electrical power output c Energy efficiency 9 If a car engine runs but the wheels don’t move, energy is mostly... a Converted to kinetic energy b Wasted as heat c Stored as potential energy 10 Which action improves overall energy efficiency at home? a Running multiple appliances at once b Turning on space heaters c Using LED lighting 11 When energy is supplied as heat, it is primarily used to what in a system? a Create new matter b Cool the system c Do work or cause movement 12 Heat energy can increase which property of a substance? a Internal energy or temperature b Mass c Color 13 Which process describes heat moving into a system from its surroundings? a Heat gain or heat input b Heat loss c Light reflection 14 In thermodynamics, heat transfer to a system commonly results in: a No change in energy b Decreased volume c Increased molecular motion 15 What is another use of supplied energy besides warming the substance? a Dissolving solids b Silently cooling the environment c Performing work 16 Heat energy flowing into a system is called: a Heat input or heat gain b Heat output c Thermal radiation 17 Energy supplied as heat can increase the system’s: a Color b Mass loss c Temp, pressure, or volume (depending on constraints) 18 Which statement best describes heat in energy transfer? a Energy stored in the system b Energy of motion only c Energy in transit due to temperature difference 19 If a device is heated, what is a likely result? a The system cools down b No change in energy c The internal energy rises 20 What is the primary purpose of adding heat to many systems? a To raise temperature or do work b To add mass only c To increase volume only

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Energy Quiz: Efficiency & Energy Types

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Energy Quiz: Efficiency & Energy TypesVersión en línea

por genevieve

What is energy efficiency in a device?

Useful energy is the portion that does the intended job. What is wasted energy?

Heat energy is also called...

Which statement best defines heat/thermal energy?

Sound energy is energy carried by...

Which example wastes energy?

Heat transfer by direct contact is known as...

In insulation, reducing heat loss improves...

If a car engine runs but the wheels don’t move, energy is mostly...

Which action improves overall energy efficiency at home?

When energy is supplied as heat, it is primarily used to what in a system?

Heat energy can increase which property of a substance?

Which process describes heat moving into a system from its surroundings?

In thermodynamics, heat transfer to a system commonly results in:

What is another use of supplied energy besides warming the substance?

Heat energy flowing into a system is called:

Energy supplied as heat can increase the system’s:

Which statement best describes heat in energy transfer?

If a device is heated, what is a likely result?

What is the primary purpose of adding heat to many systems?