# Chapter Objectives 5-7 5. Recognize the units used in the International System of measurement. 5. Recognize the units used in the International System.

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Chapter Objectives 5-7 5. Recognize the units used in the International System of measurement. 5. Recognize the units used in the International System of measurement. 6. Make conversions within the SI. 6. Make conversions within the SI. 7. Distinguish between mass and weight. 7. Distinguish between mass and weight.

International System of Measurement All measurements have a number and a unit

Basic Units Length=meter Length=meter Volume=liter Volume=liter Mass=gram Mass=gram

Mass vs. Weight MassWeight Amount of matter Gravitational attraction Measured in grams (g) Measured in newtons (N) Measured with a balance Measured with a spring scale

Common prefixes used in SI System Kilo (K)=1000 Kilo (K)=1000 Hecto (h)=100 Hecto (h)=100 Deka (da)=10 Deka (da)=10 Deci (d)=0.1 Deci (d)=0.1 Centi (c)=0.01 Centi (c)=0.01 Milli (m)=0.001 Milli (m)=0.001 King Henry Died Unexpectedly Drinking Chocolate Milk. Kilo-Hecto-Deka-UNIT-Deci-Centi-Milli

1 million microphones = 1 megaphone 1 million bicycles = 2 megacycles 52 cards = 1 decacards 1/2 lavatory = 1 demijohn 2000 mockingbirds = 2 kilomockingbirds 3-1/3 tridents = 1 decadent 10 monologs = 5 dialogues 2 monograms = 1 diagram 1 millionth of a fish = 1 microfiche 10 rations = 1 decoration 10 millipedes = 1 centipede 1 million microphones = 1 megaphone 1 million bicycles = 2 megacycles 52 cards = 1 decacards 1/2 lavatory = 1 demijohn 2000 mockingbirds = 2 kilomockingbirds 3-1/3 tridents = 1 decadent 10 monologs = 5 dialogues 2 monograms = 1 diagram 1 millionth of a fish = 1 microfiche 10 rations = 1 decoration 10 millipedes = 1 centipede

Advantages of SI System Everything is in multiples of 10 Everything is in multiples of 10 The rest of the world uses it The rest of the world uses it The names used are logical The names used are logical

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