1 / 13

130 likes | 281 Views

Measurement Systems. Standards of Measurement. 1.2. Measurement Systems. Suppose the label on a ball of string indicates that the length of the string is 150. Is the length 150 feet, 150 m, or 150 cm?. For a measurement to make sense , it must include a number and a unit. Volume. liter.

Download Presentation
## Measurement Systems

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
Content is provided to you AS IS for your information and personal use only.
Download presentation by click this link.
While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

**Standards of Measurement**1.2 Measurement Systems • Suppose the label on a ball of string indicates that the length of the string is 150. • Is the length 150 feet, 150 m, or 150 cm? • For a measurement to make sense, it must include a number and a unit.**Volume**liter L International System of Units (Le Système International d’Unités) 1795: In France, a bunch of world-renowned scientists got together and decided on a standard system of units. Any combination of these units creates a derived unit.**Measurement**Accurate measurements are a basic requirement in science. A standard is an exact quantity people agree to for comparison. Standards define each unit. Mass of a kilogram is compared to the international prototype kilogram made of platinum alloy**Mass**The kilogram (kg) is the SI unit of mass. 1 kg = 2.205 pounds Measured using a balance/scale**Measuring Distance**Length is the distance between two points. The meter (m) is the SI unit of length. It is defined as the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second . How many cm are in 1 m?**Volume**The SI unit for volume is the liter (L). V = l x w xh Liquid volumes are measured using a graduated cylinder Solid volumes are found by multiplication 1 mL = 1cm3**Density**Density is the mass of a material divided by its volume. m D= V**Standards of Measurement**1.2 The measurement unit for density: g/cm3 (a combination of SI units = a derived unit)**Standards of Measurement**1.2 What’s Hot and What’s Not Temperature is the measure of how much heat something contains. For most scientific work, temperature is measured on the Celsius (C) scale, where the freezing point of water is 0C, and the boiling point of water is 100C.**Time and Temperature**The SI unit for time is the second (s). The SI unit for temperature is kelvin (K). degrees Celsius + 273 = kelvins Fahrenheit = 1.8C + 32 At what temperature does water freeze on the Kelvin scale? At what temp does it boil? 273 K, 373 K**Section Check**1.2 Question 1 A __________ is an exact quantity that people agree to use to compare measurements. B! A.) variable B.) standard C.) unit D.) control SI standards are universally accepted and understood by scientists throughout the world.**Section Check**1.2 Question 2 The amount of space occupied by an object is called _________? Answer The answer is volume. To find the volume of a solid rectangle, measure the rectangle’s length by its width by its height.

More Related