Metric System Scientific Measurements. Measurement Systems We have our own the “English” system...
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Transcript of Metric System Scientific Measurements. Measurement Systems We have our own the “English” system...
Metric SystemScientific Measurements
Measurement Systems We have our own the “English” system Science involves a lot of converting, the English system is hard
to convert Metric system is easier to convert because it is based on
powers of 10
Standard Measurements A standard measurement system means everyone is using the
same measurement system. Why do is it important in science that all measurements are in
the same system? So we can compare measurements and know what all scientists mean. We are
speaking the same “language!”
SI (Systeme International) is another name for the metric system
THEY ARE THE SAME THING!
Every country in the world uses the metric system except the US, Liberia and Burma.
Metric System Base Units
Quantity UnitLength MeterTime Second
Temperature KelvinMass Gram
Weight Newton (NOT pound)Volume Liter
Metric System Prefixes
Converting
Converting
K H D base d c m
King Henry Drank delicious chocolate milk
PracticeUnit Base Unit Prefix Measuring
hg Gram Hecto Mass
cL
km
kL
cg
mm
dg
Dm
mL
Types of Measurements
Length, Mass, Weight, Mass, Temperature, Time, Density and Volume
Length Distance between two points Unit is the meter Use rulers or meter sticks to find
Mass The amount of matter that makes up an object Unit is the gram The mass of an object does NOT change unless we ADD or
SUBTRACT from it
Weight A measure of the force of gravity on an object Weight can CHANGE depending on the force of gravity
EX: Earth and Moon
Unit is the Newton (N)
Volume Amount of space occupied by an object Unit is the Liter Volume for a Solid: Length x Width x Height = answer cm3
Volume of a Liquid:
Measure in a graduated cylinder
Volume Water Displacement:
-Used to find the volume if an object is not square of a liquid
-Put water in a graduated cylinder, amount water rises is the volume
-Ex: If a rock causes the level to rise from 7 ml to 9 ml then the volume is 2 ml
Water Displacement
Time Interval between two events Unit is seconds
Temperature Measure of how hot or cold something is Unit is Kelvin Celsius = scale based on the freezing and boiling points of water 0 ⁰C = freezing point of water 100 ⁰C = boiling point of water
REMEMBER:
NO LONELY NUMBERS!
ALL NUMBERS WILL NEED A UNIT!!!!