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English system

a nondecimal system of measurement without basic units

metric system

a decimal system of measurement with basic units

meter

the basic unit of length in the metric system

gram

the basic unit of mass in the metric system

liter

the basic unit of volume in the metric system

second

the basic unit of time in the metric system

International System

a comprehensive system of measurement with seven base units

unit equation

a statement of two equivalent values, for example, 1 in = 2.54 cm

exact equivalent

a statement of two exactly equal values, for example 1 m = 100 cm

unit factor

a ratio of two quantities that are equivalent, for example, 1 lb/454 g

reciprocal

the relationship between a fraction and its inverse, for example, 1 qt/946 mL and 946 mL/1 qt

unit analysis method

a procedure for solving problems that proceeds from a given value to a related answer by the conversion of units

cubic centimeter

the volume occupied by a cube 1 cm on a side

volume by displacement

a technique for determining volume from the amount of water displaced

density

the amount of mass in one unit of volume

specific gravity

the ratio of the density of liquid compared to the density of water at 4°C

heat

the flow of energy from an object at a higher temperature to an object at a lower temperature

temperature

the average kinetic energy of molecules in motion

Fahrenheit degree

the basic unit of temperature in the English system

Celsius degree

the basic unit of temperature in metric system

Kelvin unit

Basic unit of temperature in the SI system

specific heat

amount of heat required to raise 1g of substance 1°C

calorie

amount of heat required to raise 1g of water 1°C

joule

unit of energy in the SI system