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Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
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Slide 1
MEASUREMENT MATTERS!
Food Science
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
2
Slide 2
TEA Copyright2
Copyright © Texas Education Agency, 2015. These Materials are copyrighted (©) and trademarked (™) as the property of
the Texas Education Agency (TEA) and may not be reproduced without the expressed written permission of TEA, except under
the following conditions:
1) Texas public school districts, charter schools, and Education Service Centers may reproduce and use copies of the
Materials and Related Materials for the districts’ and schools’ educational use without obtaining permission from TEA.
2) Residents of the state of Texas may reproduce and use copies of the Materials and Related Materials for individual
personal use only, without obtaining written permission of TEA.
3) Any portion reproduced must be reproduced in its entirety and remain unedited, unaltered, and unchanged in any way.
4) No monetary charge can be made for the reproduced materials or any document containing them; however, a reasonable
charge to cover only the cost of reproduction and distribution may be charged.
Private entities or persons located in Texas that are not Texas public school districts, Texas Education Service Centers, or
Texas charter schools or any entity, whether public or private, educational or non-educational, located outside the state of
Texas MUST obtain written approval from TEA and will be required to enter into a license agreement that may involve the
payment of a licensing fee or a royalty.
For information contact: Office of Copyrights, Trademarks, License Agreements, and Royalties, Texas Education Agency, 1701
N. Congress Ave., Austin, TX 78701-1494; phone 512-463-7004; email: [email protected].
Copyright © Texas Education Agency, 2015. All rights reserved.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
3
Slide 3
Measurements in Food Science3
To take accurate measurements, follow these guidelines:
Identify the system of measurement
Determine what is to be measured
Decide what method of measurement will give most consistent results
Copyright © Texas Education Agency, 2015. All rights reserved.
Measurement - a collection of quantitative data made by comparing a quantity with a standard unit
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
4
Slide 4
The Metric System4
Copyright © Texas Education Agency, 2015. All rights reserved.
The metric system is a decimal system of measurement. All units in the metric system are divisible by ten. Examples of the metric system in the United States are: • drinks sold in liters (L) • food mas shown in grams (g) • road signs show distance in kilometers (km) • running competitions measured in meters (m)
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
5
Slide 5
Cooking and Baking Success
Just as in science, cooking and
baking requires exactness
Recipes have been tested to
ensure the same product is
produced every time
Precise numbers and units will
develop a consistent product
5
Copyright © Texas Education Agency, 2015. All rights reserved.
It is important to know how to measure and read measurements accurately in science and in the kitchen. Recipes are scientific equations that help produce the same product every time. Just as we know 2 + 2 will always equal 4, we know that our cookie recipe should produce the same product every time. The only difference between these two formulas is that with the recipe, you are responsible for accurate measurements to develop a consistent product.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
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6
Slide 6
Length Time
Mass Volume
Temperature
Basic Metric Units6
Copyright © Texas Education Agency, 2015. All rights reserved.
In this food science course, we will use the basic metric units of length, mass, temperature, time and volume.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
7
Slide 7
Measuring Length
Metric ruler
Meter stick
centimeters (cm)
millimeters (mm)
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Equipment Common Units
Copyright © Texas Education Agency, 2015. All rights reserved.
Length is the distance between two points. Demonstrate how to use a metric ruler and/or a meter stick.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
8
Slide 8
Measuring Mass
Electronic balance
Triple beam balance
ounces
gram
kilogram
pounds
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Equipment Common Units
Copyright © Texas Education Agency, 2015. All rights reserved.
Mass is a measure of the quantity of matter. The two most common tools for measuring mass are the electronic balance and triple beam balance (scales may also be used). A triple beam balance has three beams. Items to be weighed will need to be placed on weighing papers, weighing dishes, cupcake liners or coffee filters. Demonstrate how to measure mass.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
9
Slide 9
Measuring Time
Clock
Watch
Seconds
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Equipment Common Units
Copyright © Texas Education Agency, 2015. All rights reserved.
Time will be measured in seconds in most food science experiments using a clock or a watch. Someone should be assigned as a timer to record start and stop times.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
10
Slide 10
Measuring Temperature
Thermometer Celsius degree ( C)
Fahrenheit ( F)
10
Equipment Common Units
Copyright © Texas Education Agency, 2015. All rights reserved.
Temperature is a measure of heat intensity. Most laboratory thermometers are marked with both Celsius and Fahrenheit scales.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
Page
11
Slide 11
Measuring Volume
Beakers
Graduated cylinders
liters (L)
milliliters (mL)
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Equipment Common Unites
Copyright © Texas Education Agency, 2015. All rights reserved.
Volume is the amount of space occupied by an object. Liquids are usually measured by volume. Be sure to place the container on a level surface and read the volume at eye level. Demonstrate this procedure.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
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12
Slide 12
U. S. Switch to Metric System?12
(click on image)
‘The Federal Eye'
Ed O'Keefe
answers a reader's
question about U.S.
efforts to switch to
the metric system
Copyright © Texas Education Agency, 2015. All rights reserved.
Click on image to view YouTube™ video: U.S. Switch to Metric System? 'The Federal Eye' Ed O'Keefe answers a reader's question about U.S. efforts to switch to the metric system. http://youtu.be/xXK-QJ_9SLs
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
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13
Slide 13
Units
Be sure to list the units being
measured
Clarify whether the items measured
are in metric or English units
Specify which units you used
Examples include:
ounces
pounds
grams
kilograms
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Reminder - during the food science experiments, be sure to list the units for the items being measured on your data sheets.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
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14
Slide 14
Questions?14
Copyright © Texas Education Agency, 2015. All rights reserved.
Presentation Notes Measurement Matters!
Measurement Matters! Copyright © Texas Education Agency, 2015. All rights reserved.
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Slide 15
References and Resources
Images:
Shutterstock™ images. Photos obtained with subscription. (Slides 3, 5, 7, 8, 10, 11, 13, 14)
Textbook(s):
Mehas, K. Y., & Rodgers, S. L. (2002). Food science: The biochemistry of food and nutrition. New York, NY: Glencoe/McGraw-Hill.
Ward, J. D., & Ward, L. T. (2013). Principles of food science. Tinley Park, IL: Goodheart-Willcox Company.
YouTube™:
U.S. Switch to Metric System?
'The Federal Eye' Ed O'Keefe answers a reader's question about U.S. efforts to switch to the metric system.
http://youtu.be/xXK-QJ_9SLs
Copyright © Texas Education Agency, 2015. All rights reserved.
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