Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement Early Measurement History

What Do the Following Terms Mean? Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement What Do the Following Terms Mean? The Cubit . . . The Fathom . . . The Hand/span . . . The Pace . . . The Foot . . . The Girth . . . The Palm . . .

Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement The Cubit The cubit was the measurement used by the Egyptians to build the pyramids. The cubit is the measure from your elbow to the tip of your middle finger when your arm is extended.

Early Measurement History The Fathom Gateway To Technology Unit 1– Lesson 1.3 – Measurement The fathom was used by seamen to measure the depth of water so that boats would not run aground and be stranded. The fathom is the measure from fingertip to fingertip when your arms are stretched sideways as far as they will go. You sometimes see a rope or fabric measured in this way.

Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement The Hand-span The hand-span was used to measure the height of horses. People still describe horses as being so many hands high. The hand-span is the measure from the tip of your pinky to the tip of your thumb when your hand is stretched out.

Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement The Pace This term was used by the Roman army to judge speed. The term is still used frequently during various types of foot races. The pace is the measure of distance from one step to another.

Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement The Foot A measurement equal to the length of an individuals foot. King Henry 1 standardized this measurement, because his foot was 12 inches long.

Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement The Girth Girth was a measurement often used to measure fishing line. The girth was the measurement around one’s stomach (your belt measure).

Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement The Palm The palm is the width of your four fingers when they are placed together.

Some folks found measuring in this fashion to be quite challenging. Early Measurement History Gateway To Technology Unit 1– Lesson 1.3 – Measurement Some folks found measuring in this fashion to be quite challenging. So, two types of standard measuring systems were created.

Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Measurement Systems Two types of measurement systems exist. Standard (Customary) Three countries have not officially adopted the International System of Units as their primary or sole system of measurement: Liberia, Myanmar, and the United States. The U. S. has switched to Metric with Sporting Events - Olympics Military Medicine Scientific studies At this time, Manufacturing; Transportation; and Construction Industries; are primarily using the U.S. Customary system. In certain sectors, the conversion is obvious (i.e. – Automobiles). However, in these industry areas the changes have not been as complete. This is the reasoning for studying both measurement systems used in the United States. Metric (SI or International System)

Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Standard (Customary) System Inches Fractions The Whole Inch 2 First Half Second Half ¼ ¾ 4 Notice that all denominators are even numbers. Therefore, if your numerator is also even, then your fraction can be reduced. 1/8 3/8 5/8 7/8 8 1/16 3/16 5/16 7/16 9/16 11/16 13/16 15/16 16

Introduction to Standard and Metric Measurement Steps in Using the Standard (Customary) System Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning 1. Find out how many parts the inches are divided into. Count the spaces in 1 inch. This number will be the denominator. 2. Count the number of whole inches. Write down the number. 3. Count the number of spaces after the last whole inch. This number will be the numerator. 4. Reduce fraction, if necessary.

Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Let’s Review 7 1 Find Numerator Step 3 Count Whole Inches Step 2 16 Step 1 Find Denominator Reduce Fraction, If Necessary Step 4

Introduction to Standard and Metric Measurement Let’s Practice Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning What is the distance from the end of the ruler to A? ¼ in. What is the distance from the end of the ruler to B? 15/16 in. What is the distance from the end of the ruler to C? 1 ¾ in. What is the distance from the end of the ruler to D? 2 3/8 in. What is the distance from the end of the ruler to E? 3 1/16 in.

Metric System International System of Units (SI) Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Metric System International System of Units (SI) Millimeters and Centimeters Decimals 1 mm = 0.1 cm 5 mm = 0.5 cm The metric system is much easier to use than the English system because it was based on a decimal system (powers of ten). Therefore, you don't have to remember all the different conversions (16 ounces in a pound, 12 inches in a foot, and so on). You only have to remember a short list of prefixes that represent powers of ten. Common units for length, width, distance, thickness, girth, etc. are: Millimeter mm 10-3 10 mm = 1 cm Centimeter cm 10-2 100 cm = 10 dm = 1 m Decimeter dm 10-1 10 dm = 1 m    Kilometer km 103 1 km = 1000 m 10 mm = 1 cm

Steps in Using the Metric (SI) System Introduction to Standard and Metric Measurement Steps in Using the Metric (SI) System Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Count the number of whole centimeters (cm). These are the larger lines with numbers 2. Count the number of lines after the whole number. The smaller lines are millimeters (mm). 3. Put in correct terms. Since mm are 1/10th of a cm, if you measure 7 marks after 1 cm, the measure is 1.7 cm or 17 mm long.

Introduction to Standard and Metric Measurement Let’s Practice Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning What is the distance from the end of the ruler to A? 4 mm = 0.4 cm What is the distance from the end of the ruler to B? 19 mm = 1.9 cm What is the distance from the end of the ruler to C? 37 mm = 3.7 cm What is the distance from the end of the ruler to D? 63 mm = 6.3 cm What is the distance from the end of the ruler to E? 73 mm = 7.3 cm

Converting from Standard to Metric Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Converting from Standard to Metric Convert from: To: Multiply by: mile kilometer (km) 1.609347 inch millimeter (mm) 25.4 inch centimeter (cm) 2.54 foot meter (m) 0.3048 yard meter (m) 0.9144

Introduction to Standard and Metric Measurement Gateway To Technology Unit 1 – Lesson 1.3 – Dimensioning Converting from Metric to Standard Convert from: To: Multiply by: kilometer (km) mile 0.6214 millimeter (mm) inch 0.0394 centimeter (cm) inch 0.3937 meter (m) foot 3.281 meter (m) yard 1.094