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# Units of measurement

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### Transcript

• 1. Chapter 1 Measurements Units of Measurement
• 2. Measurement
• You are making a measurement when you
• Check you weight
• Take your temperature
• Weigh a cantaloupe
• What kinds of measurements did you make today?
• 3. Standards of Measurement
• When we measure, we use a measuring tool to compare some dimension of an object to a standard.
• 4. Some Tools for Measurement
• 5. Learning Check
• From the previous slide, state the tool (s) you would use to measure
• A . temperature ____________________
• B . volume ____________________
• ____________________
• C. time ____________________
• D. weight ____________________
• 6. Solution
• From the previous slide, state the tool (s) you would use to measure
• A . temperature thermometer
• B. volume measuring cup, graduated cylinder
• C. time watch
• D . weight scale
• 7. Measurement in Chemistry
• In chemistry we
• do experiments
• measure quantities
• use numbers to report measurements
• 8. Learning Check
• What are some U.S. units that are used to measure each of the following?
• A. length
• B. volume
• C. weight
• D. temperature
• 9. Solution
• Some possible answers are
• A. length inch, foot, yard, mile
• B. volume cup, teaspoon, gallon, pint, quart
• C. weight ounce, pound (lb), ton
• D. temperature  F
• 10. Metric System (SI)
• Is a decimal system based on 10
• Used in most of the world
• Used by scientists and hospitals
• 11. Units in the Metric System
• length meter m
• volume liter L
• mass gram g
• temperature Celsius °C
• 12. Stating a Measurement
• In every measurement there is a
• Number
• followed by a
• Unit from measuring device
• 13. Learning Check
• What is the unit of measurement in each of the following examples?
• A. The patient’s temperature is 102°F.
• B. The sack holds 5 lbs of potatoes.
• C. It is 8 miles from your house to school.
• D. The bottle holds 2 L of orange soda.
• 14. Solution
• A . °F (degrees Fahrenheit)
• B. lbs (pounds)
• C. miles
• D. L (liters)
• 15. Learning Check
• Identify the measurement in metric units.
• A. John’s height is
• 1) 1.5 yards 2) 6 feet 3) 2 meters
• B. The volume of saline in the IV bottle is
• 1) 1 liters 2) 1 quart 3) 2 pints
• C. The mass of a lemon is
• 1) 12 ounces 2) 145 grams 3) 0.6 pounds
• 16. Solution
• A. John’s height is
• 3) 2 meters
• B. The volume of saline in the IV bottle is
• 1) 1 liter
• C. The mass of a lemon is
• 2) 145 grams