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Chapter 1 Measurements Units of Measurement. Measurement You are making a measurement when you Check you weight Read your watch Take your temperature.

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Presentation on theme: "Chapter 1 Measurements Units of Measurement. Measurement You are making a measurement when you Check you weight Read your watch Take your temperature."— Presentation transcript:

1 Chapter 1 Measurements Units of Measurement

2 Measurement You are making a measurement when you Check you weight Read your watch 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. temperaturethermometer B. volume measuring cup, graduated cylinder C. timewatch D. weightscale

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 volumeliter L mass gram g temperatureCelsius °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 patients 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. Johns height is 1) 1.5 yards2) 6 feet3) 2 meters B. The volume of saline in the IV bottle is 1) 1 liters2) 1 quart3) 2 pints C. The mass of a lemon is 1) 12 ounces 2) 145 grams3) 0.6 pounds

16 Solution A. Johns 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


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