Vocabulary
An atom which has gained or lost electrons and now has a net charge.
What is an ion?
This is another name for the SI system.
What is metric?
A unit conversion factor is a fractional expression in which the numerator and denominator are ________________ ways of writing the same quantity.
What is equivalent?
The precision of any measurement is indicated by the number of _____________________ it contains.
What are significant figures (or sig figs)?
15.75 kg/m3 in g/cm3
What is 0.01575? (or 1.575 x 10-2)
A system when not tended to naturally increases in disorder.
*Double your points by giving examples of this increasing and decreasing.*
What is entropy?
Three prefixes that indicate a multiple of a base unit
What are (any three of the following)
deca-, hecto-, kilo-, mega-, giga-, tetra-
1 inch =___________ centimeters
What is 2.54?
Trailing zeros are significant in this case.
What is when they are after a decimal?
65 mph in meters per second (1 mile = 1609 m)
What is 29? (rounded for sig figs from 29.05138888)
Mass vs. Inertia
What is mass is how much matter is in something while inertia is how much it resists being accelerated?
The seven SI base units and what they measure.
What are meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), candela (luminous intensity), and mole (amount of substance)?
1 mile = ________ feet
What is 5280?
The digit in a measurement that is estimated.
What is the last digit?
55 gallons in liters (and 1 gallon =3.785 liters).
What is 200 L? (rounded for sig figs from 208.175--as a volume rather than length we round down rather than up).
Accuracy vs. Precision
*Double your points by explaining how accuracy and precision relate to a speedometer.*
What is accuracy is how close a measured value is to the actual value and precision is the degree of "fine-ness" in the measurement?
Three derived units in the SI system and what they measure.
What are (any three of the following)
--joule (energy)
--newton (force)
--cubic meter (volume)
--watt (power)
--pascal (pressure)
1 L = _________________nL
What is 1 x 109 or 1,000,000,000
How to determine the number of sig figs in an addition or subtraction problem.
What is you round to the lowest number of decimal places?
152,000 gal/hr in qts/s
What is 169? (rounded from 168.88888..)
Endothermic vs Exothermic reactions
What are endothermic reactions absorb energy while exothermic reactions release energy (demonstrated by light, fire, and/or sound)?
Two advantages of the SI system over the USCS (aka Imperial).
What are (any two of the following)
--There is one basic unit for each kind of quantity
--Prefixes indicate various sizes of quantities
--SI is based on powers of ten, not random numbers
--Units for different types of quantities are related to one another in some way ?
1 MW = _______________W
What is 1 x 106 or 1,000,000?
How you determine the number of sig figs in a multiplication or division problem.
What is you round the same number of significant digits as the least precise measurement?
22.1 ft2 in cm2 with the proper number of sig figs
What is 20,500? (rounded from 20532.57...)