Measuring Length

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

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

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”

Finding the Length Find the two big 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.

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

The line is 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

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

The line is 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

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

The line is 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