1. Chapter 1.4

2. < BackNext >PreviewMain Tools for Measuring Tools for Analyzing Stopwatches, metersticks, thermometers, and balances are examples of tools for measuring. Calculators, computers, and even pencils and paper, are tools you can use to analyze your data. Why is accurate measurement important? The more exact our measurements, the more exact our understanding of the world around us.

3. < BackNext >PreviewMain The International System of Units (SI) Length is the current name for the metric system. It is used by most scientists and almost all countries. All SI units are based on the number 10. The basic SI unit of length is the meter (m). Other SI units of length are larger or smaller than the meter by multiples of 10.

4. < BackNext >PreviewMain Area The equation for calculating area is: is a measure of how much surface an object has. The units for area are square units, such as square kilometers (km 2 ) and square meters (m 2 ). area  length  width

5. < BackNext >PreviewMain Mass Weight Volume is the amount of matter that something is made of. The kilogram (kg) is basic SI unit for mass. The force of gravity acting on an object. (Your weight changes when if you go to the moon, your mass does not) is the amount of space that something occupies. The volume of liquids are usually given in liters (L) or milliliters (mL). The volume of solids can be given in cubic meters (m 3 ), cubic centimeters (cm 3 ), or cubic millimeters (mm 3 ).

6. < BackNext >PreviewMain Finding Volume Meniscus: the level of the liquid at its lowest point.

7. < BackNext >PreviewMain Density The equation for calculating density is: density  mass volume is the amount of matter in a given volume. Density can be expressed in grams per milliliter (g/mL) or grams per cubic centimeter (g/cm 3 ).

8. < BackNext >PreviewMain Temperature is a measure of how hot (or cold) something is. Scientists often use degrees Celsius (°C) as the unit for temperature. Kelvins (K), the SI base unit for temperature, is also used.

9. < BackNext >PreviewMain  kilo – means ______________.  centi – means ______________.  milli – means _______________. 1,000 0.01 ( 1/100) 0.001 (1/1,000)