Warm-upTues. 2/6/07 1.a.) __________measure volume b.) __________measure distance c.) __________measure mass *Liters (L)*Meters (m)*Grams (g) 2.Which is larger? a.) 1 Milliliter (mL) or 1 Liter (L)? b.) 1 Meter (m) or 1 Centimeter (cm)? c.) 1 Gram (g) or 1 Kilogram (kg)? 3.How many meters (m) are in 1 Kilometer (km)? 4.How many centimeters (cm) are in 1 kilometer (km)?

Warm-up answers: 1. a.) Liters (L) measure volume b.) Meters (m) measure length c.) Grams (g) measure mass 2.a.) 1 L > 1mL b.) 1 m > 1 cm c.) 1 Kg > 1 g 3.There are 1,000 m in 1 km 1,000 m = 1 km 4.There are 100,000 cm in 1 km 100,000 cm = 1 km

Scientific Method 5 Steps 1.Ask a question 2.Form a hypothesis (Make a guess) 3.Design an experiment 4.Collect and Analyze data 5.Make a conclusion

The Metric System of Measurement In Science, we must make precise measurements before our observations can be analyzed. What kinds of measurements do we make? –Length (m) –Volume (L), (m 3 ) –Mass (g) Many OTHERS… weight, temperature, electrical current, force…

English Vs. Metric ENGLISH UNITSFor everyday measurements, most Americans use ENGLISH UNITS –Inches, miles, quarts, pounds METRIC UNITSFor all science work we use METRIC UNITS –meters (m), Liters (L), grams (g) “S.I. SYSTEM” –Also known as: “S.I. SYSTEM” Why?Why? –So that everyone is describing objects and properties of objects in the same Language

We are NOT going to use the English System in this Science class!

It is necessary to have a common language of measurement so that we can understand what other scientists are talking about.

Metric System UNITSPREFIXESMade-up of UNITS and PREFIXES UNITS: measurements that do not changeUNITS: measurements that do not change –meters (m) –Liters (L) –Grams (g) PREFIX: a beginning that you add to a word to change its meaningPREFIX: a beginning that you add to a word to change its meaning –Example: Pre-game, what happens on ESPN before the game –Example: Superman, he’s more than just an ordinary man

Common Metric Units of Measurement Length is measured in ___________ Volume is measured in ___________ Mass is measured in _____________ Meters (m) Liters (L) Grams (g)

Common Metric Pre-Fixes Kilo - Centi - Milli / /

Metric System Based on Powers of 10Based on Powers of 10 easily change between units.This allows us to easily change between units. $ Like Money $

Making Conversions Basic Unit Kilo- Hecto- Deca- Deci- Centi- Milli units 100 units 10 units 0.1 units 0.01 units units To convert to a smaller unit, move decimal point to the right, or multiply To convert to a larger unit, move decimal point to the left, or divide x10 x100 x1000 ÷10 ÷100 ÷1000 m, L, g

Practicing Metrics Conversions Let’s practice a few on the board Then we’re going to do the metrics lab

Warm-down 5 steps of scientific method: 1.Question 2.Hypothesis 3.Experiment 4.Collect & analyze data 5.Conclusion

Warm-down: Which system of Measurement do we use in ALL SCIENCE? –Metric System

Common Metric Units of Measurement Length is measured in ___________ Volume is measured in ___________ Mass is measured in _____________ Meters (m) Liters (L) Grams (g)

Metric system is based on… powers of 10 The metric system is based on powers of 10