T. Trimpe 2008 http://sciencespot.net/ Lesson 1: Length T. Trimpe 2008 http://sciencespot.net/

English vs. Metric Units Which is longer? A. 1 mile or 1 kilometer B. 1 yard or 1 meter C. 1 inch or 1 centimeter 1.6 kilometers 1 mile 1 yard = 0.9444 meters 1 inch = 2.54 centimeters Left Image: http://webapps.lsa.umich.edu/physics/demolab/controls/imagedemosm.aspx?picid=1167 Right Image: http://share.lancealan.com/N800%20ruler.jpg

Click the image to watch a short video about the meter. Metric Units km m cm mm The basic unit of length in the metric system in the meter and is represented by a lowercase m. Standard: The distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second. Metric Units 1 Kilometer (km) = 1000 meters 1 Meter = 100 Centimeters (cm) 1 Meter = 1000 Millimeters (mm) Click the image to watch a short video about the meter. Which is larger? A. 1 meter or 105 centimeters B. 4 kilometers or 4400 meters C. 12 centimeters or 102 millimeters D. 1200 millimeters or 1 meter

Measuring Length How many millimeters are in 1 centimeter? 1 centimeter = 10 millimeters 1 decimeter (dm) = 10 centimeters How many millimeters are in 1 centimeter? What is the length of the line in centimeters? _______cm What is the length of the line in millimeters? _______mm What is the length of the line to the nearest centimeter? ________cm HINT: Round to the nearest centimeter – no decimals. Ruler: http://www.k12math.com/math-concepts/measurement/ruler-cm.jpg

Physical Science Length Challenge 1 L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Find the length (antennae to feet) of the following insects to the nearest whole or half cm:

Find the length (antennae to feet) of the following insects to the nearest whole or half cm:

Physical Science Length Challenge 2 L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Find the lengths of the following pink lines to the nearest mm:

Find the lengths of the following pink lines to the nearest mm:

Physical Science Length Challenge 3 L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Complete the following conversions: 3 cm = _____ mm 15 cm = ____ mm 49 cm = ____ mm 103 cm = ____ mm 5 mm = _____ cm 19 mm = ____ cm 74 mm = ____ cm 158 mm = ____ cm

X 10 ÷ 10 Complete the following conversions: 5 mm = 0.5 cm 3 cm = 30 mm 15 cm = 150 mm 49 cm = 490 mm 103 cm = 1,030 mm X 10 ÷ 10

Physical Science Length Challenge 4 L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Find the lengths of the following pencils in cm & mm: Images from http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/measures/index.htm

Find the lengths of the following pencils in cm & mm: Images from http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/measures/index.htm

Physical Science Length Challenge 5 L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Complete the following conversions for centimeters and meters: 1,955 cm = ___ m 178 cm = ____ m 2,299 cm = ___ m 42 cm = ____ m 1. 8 m = ____ cm 0.56 m = ____ cm 2.3 m = ____ cm 0.02 m = ____ cm

Complete the following conversions for centimeters and meters: 1,955 cm = 19.55 m 178 cm = 1.78 m 2,299 cm = 22.99 m 42 cm = 0.42 m 1. 8 m = 180 cm 0.56 m = 56 cm 2.3 m = 230 cm 0.02 m = 2 cm ÷ 100 x 100