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Understanding Length Measurement: Units, Tools, and Techniques

ronan-hodges avatar
ronan-hodges
11 diapositives · 244 Views · Oct 25, 2014

This guide provides an overview of measuring length, detailing the primary unit of measurement, the meter, and its subdivisions such as millimeters (mm), centimeters (cm), and kilometers (km). It explains the use of tools like rulers and metersticks for determining length. You'll learn to differentiate between the centimeter and inch sides of a ruler, focusing solely on the metric system in scientific contexts. Additionally, step-by-step instructions are provided for reading measurements accurately, ensuring you can confidently express lengths in centimeters.

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  1. Measuring Length

  2. Length Units • The main unit for length is the meter or “cm” for short • There are also other smaller and bigger units like: • Millimeters or “mm” for short • Centimeters or “cm” for short • Kilometers or “km” for short • The units are how we label an answer

  3. Length Tools/Instruments • The tool or instrument used to find length is either a ruler or a meterstick

  4. Two sides of a Ruler • There are two sides to a ruler: centimeters and inches • In science you will NEVER EVER use the inches side! • The smaller/shorter dashes with NO numbers represent millimeters “mm” • The longer dashes with numbers represent centimeters “cm”

  5. Finding the Length • Find the twobig numbers that the line/object is between. • Use the lower of the two numbers. This is the first part of your answer. • Now count the dashes after the lower number. This is the second part of your answer • Take both parts of your answer and put a decimal between the two numbers • Label your answer with the unit centimeters or “cm” for short.

  6. The nail is between ___5______ and ____6_____ • I will use the _____5____ since it is smaller • 3. I count ______1_______ dashes after the big number • Answer: ____5___.____1___ centimeters

  7. The lineis between ____3_____ and _____4____ • 2. I will use the ____3_____ since it is smaller • 3. I count _____4________ dashes after the big number • 4. Answer: ____3___.___4____ centimeters

  8. The lineis between _________ and _________ • 2. I will use the _________ since it is smaller • 3. I count _____________ dashes after the big number • 4. Answer: _______._______ centimeters

  9. The lineis between ____11_____ and ____12_____ • 2. I will use the ___11______ since it is smaller • 3. I count ______6_______ dashes after the big number • 4. Answer: ___11____.___6____ centimeters

  10. The lineis between _________ and _________ • 2. I will use the _________ since it is smaller • 3. I count _____________ dashes after the big number • 4. Answer: _______._______ centimeters

  11. The lineis between ____1_____ and ____2_____ • 2. I will use the ___1______ since it is smaller • 3. I count ______8_______ dashes after the big number • 4. Answer: __1_____._____8__ centimeters