Metric Measurement I The Metric System Consist of

Metric Measurement

I. The Metric System: Consist of seven standard units and prefixes that represent powers of ten The version of used today is the International System of Units or SI. A. Prefixes Factor Word Factor Number Prefix Symbol Thousands Hundreds Tens Basic unit Tenths Hundredths Thousandths 1000 10 1 0. 01 0. 001 Meter Gram Liter deci- centi- milli- d c m kilo- hecto- deca- k h da

1. Length: distance from one point to another. ü unit = meter ü symbol = m ü instrument = meter stick.

2. Volume is the amount of space an object takes up. a. Liquid Volume = unit liter, symbol = L, instrument = graduated cylinder. b. Read bottom of the meniscus curve

c. Volume of regular shaped objects use a metric ruler and measure the 2 cm 10 cm 25 X 10 X 2 = 500 cm 3

d. Volume of irregular shaped objects like stones use graduated cylinder. 25 20 Volume is 5 cm 3

10 cm 12 cm 4 cm What is the volume of water? What is the volume of this block?

3. Mass amount of matter an object has. üUnit = Gram üSymbol = g üInstrument = Triple Beam Balance

4. Density is the amount of mass in a certain volume. The unit = g/ml or g/cm 3 mass volume a. Density = the mass divided by the volume Density = mass/volume D = m/v r U M B

5. Limits of measurements possible reasons for different measurements. 1. Human error. 2. Instruments can only measure to a certain level of accuracy. 3. There is no perfect measuring instrument.