Calculations of Unit of Measure Relating to Length – PST04105 Pharmaceutical Calculations

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NTA Level 4 • Semester 1 • PST04105

Calculations of Unit of Measure Relating to Length

Pharmaceutical Calculations • Source Session/Topic 4
Full source-text version: all educational wording from the extracted learning source is retained; only presenter/tutor metadata and web-layout noise are removed, while formatting is improved for readability.

Session 4: Calculations of Unit of Measure Relating to Length

Total Session Time: 120 minutes

Prerequisites

• None

Learning Tasks

By the end of this session students are expected to be able to:

• Define the unit of measure of length
• Convert different measures of length

Resources Needed:

• Flip charts, marker pens, and masking tape
• Black/white board and chalk/whiteboard markers

SESSION OVERVIEW

|Step |Time |Activity/ |Content |

| | |Method | |

|1 |05 minutes |Presentation |Introduction, Learning Tasks |

|2 |40 minutes |Presentation |Unit of Measure of Length |

| | |Demonstration | |

|3 |40 minutes |Presentation |Different Measures of Length |

| | |Group | |

| | |discussion | |

|4 |10 minutes |Presentation |Key Points |

| 5 |25 minutes |Presentation |Evaluation |

SESSION CONTENTS

STEP 1: Presentation of Session Title and Learning Tasks (5 minutes)

READ or ASK students to read the learning tasks and clarify

ASK students if they have any questions before continuing.

STEP 2: Unit of Measure of Length (40 minutes)

|Activity: Demonstration (30 minutes) |

| |

|DIVIDE students in small manageable groups. |

| |

|PREPARE equipment and materials needed for demonstration |

| |

|POSITION students so that everyone can see and hear |

| |

|REVIEW steps of that skill with students |

| |

|DEMONSTRATE |

|The procedures of measuring different length by using different |

|measures of length |

|ALLOW one student from each group to do a return demonstration and let |

|others comment on it |

| |

|CLARIFY and SUMMARIZE by using the content below |

• Length may be defined as the longest extent of anything as measured from

end to end

• The meter (m) is the fundamental unit of this system
• There are many instruments used to measure length including rulers, tape

measures, micrometers, gauges and vernier calipers

• There are also instruments that make use of scientific principles to

deduce length where it may not be directly measured

• Measuring lengths accurately has been a driving force behind much of

human civilization

• The selection of measuring device depends on the shape of the thing to be

measured

STEP 3: Different Measures of Length (40 Minutes)

|Activity: Small Group Discussion ( 20 minutes) |

| |

|DIVIDE students into small manageable groups |

| |

|ASK students to discuss on the following question |

|What are the different measures of length? |

| |

|ALLOW students to discuss for 15 minutes |

| |

|ALLOW few groups to present and the rest to add points not mentioned |

| |

|CLARIFY and SUMMARIZE by using the contents below |

• The following are the different measures of length:
o 1 kilometer (km) = 1000 meters
o 1 hectometer (hm) = 100 meters
o 1 dekameter (dam) = 10 meters
o 1 meter (m) = 1meter
o 1 decimeter (dm) = 0.1 meter
o 1 centimeter (cm) = 0.01 meter
o 1 millimeter (mm) = 0.001 meter
o 1 micrometer (µm) = 0.000,001 meter
o 1 nanometer (nm) = 0.000,000,001 meter
o 1 micrometer (µm) = 0.000,001 meter

Table 1: Measure of length

|Name of Unit |Abbreviation |Equivalent to |

|1 kilometre |Km |1000m |

|1 metre |M |1000mm(=0.0001km) |
|1 decimetre |Dm |100mm(=0.1m) |
|1 centimetre |Cm |10mm(=0.01m) |
|1 millimetre |Mm |1000 micron(=0.001m) |
|1 micrometre |micron/µm |1000nm(=nanometre) |

STEP 4: Key Points (10minutes)

• There are two most common measurements of length; millimeters and meter
• Millimeter is often written as mm and meter as m
• One meter comprised of 1000 millimeter (1 m = 1000 mm)

STEP 7: Evaluation (25 minutes)

• What is the unit of measure of length?
• Convert the following units of measure of length into meter: 100mm,

360cm, 80km, 123500µm, 0.045hm and 250 dm

References

Ansel, H. C & Stocklosa, M. J. (2001). Pharmaceutical Calculations (11th

ed.). Philadelphia, United States: LIPPINCOTT WILLIAMS & WILKINS

Ansel, H. C (2010) Pharmaceutical Calculations (13rd ed.). Philadelphia,

United States: LIPPINCOTT WILLIAMS & WILKINS

Senya, S. S, Mwasha, C.Y, Muyinga, A. M, Amiri,R. I. and Mauga E.A.S.K.

(2011) Tanzania Pharmaceutical Handbook (2nd ed.). Dar eS Salaam,

Tanzania: School of Pharmaceutical Sciences.

Zatz, J.L and Teixeira, M.G. (2005). Pharmaceutical Calculation (4th ed.).

New Jersey: John Wiley & Sons, Inc

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