Measurements in Science

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 metric system: (SI) Units of SI used in this class: Kilo= 1000 deci= 1/10 or .1 centi= 1/100 or .01 milli= 1/1000 or .001

When Measuring… Use… length meters (m) volume l x w x h (m3) 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

1 meter=100 centimeters (cm) 1 meter= 1000 millimeters (mm) 1 cm= 10mm

length of the Mississippi River kilometer centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter length of the Mississippi River kilometer

mass of a paper clip milligram centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter mass of a paper clip milligram

mass of an elephant kilogram centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter mass of an elephant kilogram

width of a fingernail millimeter centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter width of a fingernail millimeter

width of a TV screen centimeter centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter width of a TV screen centimeter

volume of juice in a paper cup centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter volume of juice in a paper cup milliliter

mass of a bowl of cereal grams centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter mass of a bowl of cereal grams

amount of salt in an order of french fries centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter amount of salt in an order of french fries milligram

amount of soda in a large plastic bottle centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter amount of soda in a large plastic bottle liter

temperature of a bowl of soup centimeter kilometer milligram millimeter gram kilogram Celcius meter liter milliliter temperature of a bowl of soup Celsius

Density 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? SINK! http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=17

Do two candy bars have the same density? Problem: Do two candy bars have the same density?

Will a Diet Pepsi float or sink? Regular Pepsi? What do you base your answer on? http://www.youtube.com/watch?v=3MUAL3zwN-k What did you see? Were you correct in your predictions? Why or why not?