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45 Cards in this Set
- Front
- Back
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What is SI Unit?
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International System Unit
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What system do we measure in?
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Metric Units (System)
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What is legnth measured in?
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Meters = m
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What is mass measured in?
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Kilograms = kg
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What is volume measured in?
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Liters = L
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What is the top of the water in a graduated cylinder called? This is also known as the convex or concave upper surface of a column of liquid, the curvature of which is caused by surface tension.
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Meniscus
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What do scientists do if you when measuring?
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Your last number is an estimate. 10 invisible lines in between. Most of the time your guess is ok as long as it is not too far off.
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Mega = (M)
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1,000,000 (or 10^6)
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Kilo = (k)
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1,000 (or 10^3)
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Deci = (d)
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0.1 (or 10^-1)
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Centi = (c)
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0.01 (or 10^-2)
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Milli = (m)
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0.001 (or 10^-3)
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Micro = (µ)
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0.000001 (or 10^-6)
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Nano = (n)
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0.000000001 or (or 10^-9)
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A convenient way of expressing large and small numbers using powers of 10. To write a number using powers of 10 move the decimal point in the original number so that it is located after the first nonzero digit, and follow the new number by a multiplication sign and 10 with an exponent (called its power) that is the number of places the decimal point was moved. Example: 2468 = 2.468 X 10^3.
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Scientific Notation
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The numbers of digits that are known plus one estimated digit are considered significant in a measured quantity.
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Significant Figures (Can be called significant digits)
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The process by which the value of the last digit retained is determined after dropping nonsignificant digits.
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Rounding off Numbers
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A decimal system of measurements.
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Metric System
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An agreed-upon standard system of measurements used by scientists around the world.
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SI - International System (from Systeme Internationale)
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The standard unit of length in the SI and metric systems.
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Meter (m) – 1 meter equals 39.37 inches.
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The quantity or amount of matter that an object possesses.
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Mass
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A measure of Earth’s gravitational attraction for a body (object).
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Weight
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The Standard unit of mass in the metric system.
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Kilogram (kg) – 1 kilogram equals 2.205 pounds
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The amount of space occupied by matter
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Volume – Measured in SI units by cubic meters (m^3) but also commonly in liters and milliliters.
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A unit of volume commonly used in chemistry.
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Liter (L) – 1 L = 1000 mL; the volume of a kilogram of water at 4°C.
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A measure of the intensity of heat, or of how hot or cold a system is.
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Temperature – The SI unit is the Kelvin (K).
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The mass of an object divided by its volume.
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Density
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The ratio of the density of one substance to the density of another substance taken as a standard. Water is usually the standard for liquids and solids; air, for gases.
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Specific Gravity
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1 ft = ___ in
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1 ft = 12 in
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1 yd = ___ ft
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1 yd = 3 ft
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1 Mile = ___ ft
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1 Mile = 5280 ft
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1 in = ___ cm
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1 in = 2.54 cm
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1 lb = ___ oz
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1 lb = 16 oz
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1 ton = ___ lb
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1 ton = 2000 lb
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1 lb = ___ g
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1 lb = 453.6 or 454 g
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1 kg = ___ lb
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1 kg = 2.205 lb
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1 qt = ___ pt
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1 qt = 2 pt
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1 gal = ___ qt
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1 gal = 4 qt
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1 L = ___ qt
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1 L = 1.06 qt
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1 mL = 1 cm^3 = 1 cc
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1 mL = 1 cm^3 = 1 cc
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The answer contains the same number of significant figures as the measurement with the least NUMBER of significant figures.
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Multiplication or Division
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The answer contains the same number of significant figures as the LEAST precise measurement.
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Addition or Subtraction
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K --> °C
°C --> K |
°C + 273.15
°C - 273.15 |
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°F --> °C
°C --> °F |
(1.8 x °C) +32
(°F - 32)/1.8 |
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Is it possible to go from °F --> K or K-->°F?
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No, you must convert °F or K to °C first.
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