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Ch.1, Sec.4 – Measurement Reference Guide

Learn the basics of the International System of Units (SI) and measurement. Discover how to measure length, mass, volume, density, and temperature using SI units. Practice solving measurement problems and understand the importance of accurate measurements in scientific experiments.

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Ch.1, Sec.4 – Measurement Reference Guide

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  1. Ch.1, Sec.4 – Measurement Reference Guide • the metric system is called the International System of Units (SI) and is expressed in multiples of 10 • 1. Length: - the meter (m) is the basic SI unit of length - other SI units of length are larger or smaller than the meter by multiples of 10 - if you divide 1 meter into 1,000 parts, each part equals 1 millimeter (mm)

  2. Ch.1, Sec.4 – Measurement Reference Guide • 2. Mass: - mass is the amount of matter in an object - the gram (g) is the basic SI unit of mass - the gram (g) is used to describe the mass of small objects & 1,000g = 1kg • 3. Volume - volume is the amount of space that something occupies - the liter (L) is the basic SI unit of volume for a liquid and is based on the meter

  3. Ch.1, Sec.4 – Measurement Reference Guide - therefore, a cubic meter (1 m³) = 1,000 liters - the cubic meter (m³), centimeter (cm³), & millimeter (mm³) are the basic SI unit of volume for a solid object • volume of any rectangular shape is expressed by the following formula: V = L x W x H • 4. Density: - density is the amount of matter in a given volume • density of an object can be found after mass and volume are calculated…. D = m / V

  4. Ch.1, Sec.4 – Measurement Reference Guide • 5. Temperature: - temperature is the measurement of how hot or cold a substance is - the kelvin (K) is the basic SI unit of temperature - degrees Fahrenheit (°F) and degrees Celsius (°C) are also used to measure temperature - converting Fahrenheit temperature to Celsius temperature and vice versa is by using the following formulas: °F to °C = .55 x (_°F - 32) °C to °F = 1.8 x _°C + 32

  5. Examples 1. What is the volume of a box that is 1 meter long, 0.5 meters wide, and 2 meters tall? • Solution (L x W x H): 1 x 0.5 x 2 = 1.0 m³ 2. What is the volume of a bar of soap that is 9 centimeters long, 5 centimeters wide, and 2 centimeters high? • Solution (L x W x H): 9 x 5 x 2 = 90 cm³

  6. Examples 3. A glass contains about 250 milliliters of milk. After adding a cookie to the milk, the level is 261 milliliters. Therefore, what is the volume of the cookie? • Solution (total ended with – total started with): 261 – 250 = (use cm³, not milliliters, because a cookie is a solid object!!!!) 11 cm³

  7. Examples 4. How many milliliters are in 3.5 kiloliters? A. 0.0035 C. 35,000 B. 3,500 D. 3,500,000 • Solution (the prefix milli means one-thousandth and the prefix kilo means one-thousand): there are 1 million milliliters (1,000 x 1,000) in a kiloliter, but there are 3.5 kiloliters, so 1,000,000 x 3.5 = D. 3,500,000

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