Chapter 2- Measurment and Problem Solving Flashcards
(44 cards)
Scientific notation
expresses very large and small numbers
Unit
is a standard, agreed-on quantity by which other quantities are measured
A number usually between 1 and 10
Decimal part of scientific notation
10 raised to an exponent (n)
Exponential part
Three parts of scientific notation
decimal part, exponential part and exponent (n)
Scientific figures
The non-place holding digits in a measurement
Exact numbers have unlimited number of
Significant figures
Radius
Diameter/2
All nonzero digits are
Significant
Interior zeros ( zeros between two numbers) are
Ex: 4.[0]2[0]8 and 5[0].1
Significant
Trailing zeros ( zeros to the right of a nonzero number) that fall after a decimal point are
Ex: 5.10 and 3.00
Significant
Trailing zeros that fall before a decimal point are
Ex: 5[0].00 and 17[00].24
Significant
Leading zeros ( zeros to the left of the first nonzero number) are
Ex: 0.[000]5
Not significant
English system
Unit system used in the United States
Metric System
Unit system used in most of the World
Uses units such as inches, yards, and pounds
English system
Uses units such as centimeters, meters and kilograms
Metric system
The most convenient system for science measurements is based on the metric system and is called
International System of SI units
SI units
A set of standard units agreed on by scientists throughout the world
Meter(m)
The base unit of length and the distance light travels in a certain period of time
Kilogram(kg)
Base unit of mass
Second(s)
Base unit of time
Kelvin(K)
Base unit of temperature
Speed of light
3.0 x 10^8 m/s
