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= 1,000centi= 1/100 or .01deci= 1/10 or .1milli= 1/1,000 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

centimetermillimeter

1 meter=100 centimeters (cm)1 meter= 1000 millimeters

(mm)1 cm= 10mm

What’s being

measured

Length Mass Volume Temperature

UnitsMeter(m)

Grams(g)

Liter(l)

Degrees Celsius

(oC)Instrument Meter

stickScale

(balance)Graduated cylinder

Thermo-meter

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

length of the Mississippi River

•kilometer

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

mass of a paper clip•milligram

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

mass of an elephant•kilogram

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

width of a fingernail•millimeter

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

width of a TV screen•centimeter

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

volume of juice in a paper cup

•milliliter

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

mass of a bowl of cereal•grams

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

amount of salt in an order of french fries•milligram

centimeter kilometer milligrammillimeter gram kilogramCelsius meter liter milliliter

amount of soda in a large plastic bottle

•liter

centimeter kilometer milligrammillimeter gram kilogramCelsius 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?

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