# Chapter 15-Part 2: Question Preview (ID: 30103)

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When a pot of water is put on a stove, the water at the top gets hot primarily by _______________.
b) conduction
c) convection
d) condensation

Heat is ___________ energy that is transferred from one object at a certain temperature to another at a different temperature.
a) kinetic
b) thermal
c) solar
d) electromagnetic

A heat engine _____________________.
a) changes mechanical energy to thermal energy
b) changes mechanical energy into electrical energy
c) changes thermal energy into mechanical energy
d) changes kinetic energy into thermal energy

In a diesel engine, the fuel is ignited by ______________.
a) spark plugs
b) compression
c) expansion
d) glow plugs

A device that can be used for cooling and heating is a _______________.
a) heat engine
b) compressor
c) heat pump
d) vaporizer

A winding mountain road is an example of a (n) ____________.
a) lever
b) inclined plane
c) wedge
d) wheel and axle

Three of the following simple machines are basically the same. The one that does NOT belong with the group is the ____________.
a) lever
b) pulley
c) wedge
d) wheel and axle

Temperature is a measure of _______________ of the particles in an object.
a) the difference between the potential and kinetic energy
b) the sum of the potential and kinetic energy
c) the average potential energy
d) the average kinetic energy

When two or more simple machines work together, they are called a (n) __________________.
a) compound machine
b) effort machine
c) screw
d) simple machine

A machine that changes only the direction of a force has a mechanical advantage of __________________.
a) 1
b) 2
c) 10
d) 100

A lever with a mechanical advantage greater than 1 is used to ________________.
a) change direction
b) increase distance
c) increase force
d) decrease force

A green plant has _________________ energy.
a) electrical
b) kinetic
c) chemical
d) thermal

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