This document provides information about units of measurement including customary and metric units. It discusses measuring length, weight, and capacity using units like inches, feet, yards, ounces, pounds, cups, pints, quarts, and gallons. It also explains how to use a triple beam balance to measure weight in ounces and pounds, calculate differences in weight, record data on a graph, and solve word problems involving measurements. Additional resources on units of measurement are provided.

2. Standards
Units of Measurement
3. M. 1 Select tools and units (customary) appropriate for the length measured.
3. M. 2 Use a ruler/yardstick to measure to the nearest standard unit (whole and ½
inches, whole feet, and whole yards).
3. M. 3 Measure objects, using ounces and pounds.
3. M. 4 Recognize capacity as an attribute that can be measured.
3. M. 5 Compare capacities (e.g., Which contains more? Which contains less?).
3. M. 6 Measure capacity, using cups, pints, quarts, and gallons.

3. Video

4. Parts of a Triple Beam Balance

5. Ounces
• An ounce is a unit of mass.
• It is abbreviated as “.oz”.
• When measuring an item that weighs less than a
pound, convert the measurement to ounces.
• 1 ounce is equal to 28 grams.
• 16 ounces is equal to 1 pound.

6. Pounds
• A pound is another unit of mass, and is
primarily utilized in the United States.
• It is abbreviated as “.lbs”.
• 1 pound = 16 ounces = 28 grams.

7. Finding the Difference in Weight
• Difference is the key word.
• You have to subtract two numbers to get the
difference.
• The weight of one object - the weight of
another object = difference.

8. Record Data & Plot onto Graph
• Now that you have the weight of your items, you will
now plot the data on a graph.
• Example…

9. SMART Board Activity
http://www.touchspin.com/c
hem/DisplayTBB.html

10. Using the Triple Beam Balance
• You will now measure your items on a physical
triple beam balance scale.
• Make sure that you record the data for every
object that you weigh.

11. Data on Graph

12. Word Problem
• Now that you have measured your items and
recorded your data, create a word problem using
each item’s weight.
• Example: My milk container weighs 2oz., my
notebook weighs 5.5oz., and my rock weighs 3oz.
How much do all three objects weigh together?

13. Literature Connection
• How Heavy Is It? (2006)
• In this title, readers will
learn that every object has
weight. They will also be
introduced to the types of
tools that are used to
determine weight, the basic
units of measurement, and
the importance of knowing
an object’s weight.

14. Additional Resources
 Units of measurement Dictionary:
 http://www.unc.edu/~rowlett/units/
 AAA Math – Measurement:
 http://www.aaamath.com/mea.html
 Fish Tales Measurement Game:
 http://www.compasslearningodyssey.com/sample_act/math1_2/01MADB03a-
fish_tails_v2.swf
 Choose the Appropriate Measuring Tool:
 http://www.ixl.com/math/practice/grade-2-choose-the-appropriate-measuring-tool
 Choose the Appropriate Unit of Measurement:
 http://www.ixl.com/math/practice/grade-3-which-customary-unit-is-appropriate