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Experimental measurements must not
only be RELIABLE and ACCURATE but also must be easily understood by
others
a decimal system of measurement based on 10
Units of SI used in this class:
Kilo= 1000
centi= 1/100 or .01
deci= 1/10 or .1
milli= 1/1000 or .001
When Measuring… Use…
length meters (m)
volume (lxwxh) liter (L)
mass grams (g)
temperature Celsius (°C)*Mass is a measure of amount of matter in an object.
*Weight is measure of gravitational force
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
length of the Mississippi River
•kilometer
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
mass of a paper clip
•milligram
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
mass of an elephant
•kilogram
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
width of a fingernail
•millimeter
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
width of a TV screen
•centimeter
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
volume of juice in a paper cup
•milliliter
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
mass of a bowl of cereal
•grams
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
amount of salt in an order of french fries
•milligram
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
amount of soda in a large plastic bottle
•liter
centimeter kilometer milligram
millimeter gram kilometer
Celcius meter liter milliliter
temperature of a bowl of soup
•Celsius
is the mass of an object per unit volume (D=m/v). The unit for density is a combination of more than one fundamental unit and is therefore called a derived unit
The density of water is 1.0 g/mL•If an object’s density is greater than 1.0 g/mL will it sink or float?
http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=17
Will a Diet Pepsi float or sink?
Regular Pepsi?
What do you base your answer on?What did you see?
Were you correct in your predictions?
Why or why not?