PS Quiz 1/16-21 #3

In a car engine, during which stroke does the fuel-air mixture get compressed?

• Intake stroke

• Compression stroke

• Power stroke

• Exhaust stroke

According to the second law of thermodynamics, heat energy:

• Can flow from cold to hot objects naturally

• Always flows from hot to cold objects

• Remains constant in a closed system

• Is created during mechanical processes

Tags

NGSS.HS-PS3-4

In a car engine, most of the energy from burning fuel is:

• Converted to mechanical energy

• Lost as heat

• Stored in the battery

• Converted to light

Tags

NGSS.HS-PS3-3

Match the term with its correct definition:

• First Law of Thermodynamics

• A process where energy is transferred by work

• Four-stroke Engine

• A measure of the randomness or disorder of a system

• Mechanical Process

• An engine that completes four piston movements per cycle

• Entropy

• Energy is neither created nor destroyed, only transformed

Heat energy can naturally flow from a cold object to a hot object.

• True

• False

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NGSS.HS-PS3-4

The amount of usable energy in a system tends to decrease over time.

• True

• False

A car's cooling system is necessary because engines are 100% efficient at converting fuel to motion.

• True

• False