GLE 22 Measurements Units of Measurement Measurement You

GLE 22 Measurements Units of Measurement

Measurement You are making a measurement when you ¨Fill up your water bottle ¨Measure around a poster for a frame ¨When you measure your room for carpet ¨Weigh a cantaloupe What kinds of measurements did you make today?

Standards of Measurement When we measure, we use measuring tools to compare an object to a standard tool of measure. We compare our pencils to the standard measuring tool of an inch on a ruler.

Some Tools for Measurement

Learning Check From the previous slide, state the tool (s) you would use to measure A. length ____________________ B. volume ____________________ C. weight __________

Solution From the previous slide, state the tool (s) you would use to measure A. length ruler tape measure B. volume measuring cup graduated cylinder C. weight scale

Measurement in Math & Science In math & science we ¨Measure length, area & perimeter ¨Measure mass and volume ¨Measure capacity

Learning Check What are some U. S. units that are used to measure each of the following? A. length B. capacity C. weight D. volume

Solution Some possible answers are A. length inch, foot, yard, mile B. capacity fluid ounce, cup, pint, quart, gallon C. weight ounce, pound (lb), ton D. volume cubic inch

Metric System n Is a decimal system based on 10 n Used in most of the world n Used by scientists and hospitals in the United States n Used when you get medicine at the pharmacy

Units in the Metric System l length centimeter Meter kilometer l capacity milliliter Liter l mass Gram kilogram l volume cubic centimeters (cubic cm)

Stating a Measurement In every measurement there is a ¨Number followed by a ¨ Unit from measuring device

Stating a Measurement v 15 inches v 7 miles v 3 pints v 23 cubic centimeters

Learning Check What is the unit of measurement in each of the following examples? A. The classroom is 26 feet wide. B. The sack holds 5 lbs of potatoes. C. It is 8 miles from your house to school. D. The bottle holds 2 Liters of orange soda.

Solution A. feet B. lbs (pounds) C. miles D. L (liters)

Learning Check Identify the measurement in correct units. A. John’s height is 1) 1. 5 yards 2) 6 feet 3) 3 meters B. The capacity of saline in the IV bottle is 1) 1 liters 2) 1 gallon 3) 2 ounces C. The weight (mass) of a lemon is 1) 12 ounces 2) 1 kilogram 3) 6 pounds

Solution A. John’s height is 2) 6 feet B. The capacity of saline in the IV bottle is 1) 1 liter C. The weight (mass) of a lemon is 1) 12 ounces