Chapter 1Chapter 1•Section 2

The way science works•Critical thinking – to look at a problem from all directions in order to come up with the “Best” solution

Scientific tools•Triple beam balance- Mass•Metric ruler- length•Beakers/flasks/ graduated

cylinders- volume•Thermometer- temperature•Clock - time

System Internationale•SI- standard set of

measurements used world wide for consistency.

•Meter, Gram, Liter, second, Kelvin (note: Celsius

is mostly used)

Conversions• King Henry Danced Under Dim Crescent

Moonlight.• _K__ Kilo =1000

|_H__ Hecto =100 |_DA__ Deca = 10

|_U_ Base units m,g,l, 1 |_D__ Deci =.1 1/10th

|_C__ Centi =.01 1/100th |_M__ Milli =.001 1/1000th

CONVERSIONS BETWEEN U.S. AND SI UNITS

• 1 mi =1.6093 km• 1 ft= 0.3048 m• 1 inch = 2.54cm• 1 gal = 3.8L• 1 qt= .95L • 1 pt =0.4732 L• 1lb =4.45 N

Making Measurements• Length- meter, measured with a

meter stick, large = kilo • Volume- amount of space an object

takes up • Liter for liquids, meters cubed for solids• Measure liquids with a graduated

cylinder or ruler or h2o displacement

Making Measurements• Mass – amount of matter in an object,

unit is grams, measured with a triple beam balance

• Temperature- amount of heat in an object, units are Fahrenheit, Celsius, Kelvin, measured with a thermometer.

• 300c is hot, 200c is nice, 100c is cold and 00c is ice

Making Measurements• Weight – measure of gravitational

pull on an object, unit is Newton, measured with a scale.

• Density- mass of an object per unit of volume. D= M/V,

• Water (H20)’s Density is 1g/ml• Mass and volume may change but

density does not. • SI units are gram/liter 1mL=1cm3