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45 Cards in this Set
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What is SI Unit?

International System Unit


What system do we measure in?

Metric Units (System)


What is legnth measured in?

Meters = m


What is mass measured in?

Kilograms = kg


What is volume measured in?

Liters = L


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.

Meniscus


What do scientists do if you when measuring?

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.


Mega = (M)

1,000,000 (or 10^6)


Kilo = (k)

1,000 (or 10^3)


Deci = (d)

0.1 (or 10^1)


Centi = (c)

0.01 (or 10^2)


Milli = (m)

0.001 (or 10^3)


Micro = (µ)

0.000001 (or 10^6)


Nano = (n)

0.000000001 or (or 10^9)


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.

Scientific Notation


The numbers of digits that are known plus one estimated digit are considered significant in a measured quantity.

Significant Figures (Can be called significant digits)


The process by which the value of the last digit retained is determined after dropping nonsignificant digits.

Rounding off Numbers


A decimal system of measurements.

Metric System


An agreedupon standard system of measurements used by scientists around the world.

SI  International System (from Systeme Internationale)


The standard unit of length in the SI and metric systems.

Meter (m) – 1 meter equals 39.37 inches.


The quantity or amount of matter that an object possesses.

Mass


A measure of Earth’s gravitational attraction for a body (object).

Weight


The Standard unit of mass in the metric system.

Kilogram (kg) – 1 kilogram equals 2.205 pounds


The amount of space occupied by matter

Volume – Measured in SI units by cubic meters (m^3) but also commonly in liters and milliliters.


A unit of volume commonly used in chemistry.

Liter (L) – 1 L = 1000 mL; the volume of a kilogram of water at 4°C.


A measure of the intensity of heat, or of how hot or cold a system is.

Temperature – The SI unit is the Kelvin (K).


The mass of an object divided by its volume.

Density


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.

Specific Gravity


1 ft = ___ in

1 ft = 12 in


1 yd = ___ ft

1 yd = 3 ft


1 Mile = ___ ft

1 Mile = 5280 ft


1 in = ___ cm

1 in = 2.54 cm


1 lb = ___ oz

1 lb = 16 oz


1 ton = ___ lb

1 ton = 2000 lb


1 lb = ___ g

1 lb = 453.6 or 454 g


1 kg = ___ lb

1 kg = 2.205 lb


1 qt = ___ pt

1 qt = 2 pt


1 gal = ___ qt

1 gal = 4 qt


1 L = ___ qt

1 L = 1.06 qt


1 mL = 1 cm^3 = 1 cc

1 mL = 1 cm^3 = 1 cc


The answer contains the same number of significant figures as the measurement with the least NUMBER of significant figures.

Multiplication or Division


The answer contains the same number of significant figures as the LEAST precise measurement.

Addition or Subtraction


K > °C
°C > K 
°C + 273.15
°C  273.15 

°F > °C
°C > °F 
(1.8 x °C) +32
(°F  32)/1.8 

Is it possible to go from °F > K or K>°F?

No, you must convert °F or K to °C first.
