1 / 10

Understanding Measurement: SI Units and Practical Applications

In this engaging activity, partners will measure the width of a black table without devices, recording their results to explore measurement discrepancies. Learn about measurement systems, including the English and Metric systems, and the significance of standard units like length, volume, mass, and temperature. Discover how precise measurements were used to determine the distance to the moon using laser technology. This lesson emphasizes the components of measurement, the importance of standards, and the application of units across various scientific contexts.

joie
Télécharger la présentation

Understanding Measurement: SI Units and Practical Applications

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

Presentation Transcript

  1. Bell-Ringer! • Without using a measuring device, with 2 partners measure the width of one of the black tables (center of the room). • Time: 4 minutes • Write your answer on a white board.

  2. Why do we have different answers?

  3. Measuring and SI Units

  4. standard standard • Measuring is impossible without the use of a ___________. • A __________ is an exact quantity that people agree to use for comparison. • A measurement must contain 2 parts: • A quantity (number) • A unit (refers you to the specific standard) • What type of standards do we use?

  5. Measuring Systems • English • Developed in Medieval Europe as a combination of Roman and Anglo-Saxon terms • Used in US today • Metric • Developed in 1700s

  6. International System of Units: SI • Uses an improved metric system • Each type of measurement has a base unit.

  7. Length: the distance between 2 points. • Volume: amount of space an object occupies. • Mass: amount of matter in an object. • Time: interval between 2 events

  8. Practical Application: How do we measure the distance to the moon? • In 1970s astronauts placed light reflectors on the moon. • Lasers on Earth aimed at the reflectors and the time it took for the light to go from EarthMoonEarth was recorded. • Compared to the speed of light 3x108m/s. • Distance to moon = 378,000,000 m

  9. Other measurements: • The speed of light is 3x108m/s. This unit is not on the table. • Derived units: obtained by combining units on the table. • Speed (length ∕ time) • Area (length x width) • Volume (length x width x height) • Density (mass/volume)

  10. Temperature • The SI unit of temperature is Kelvin (K). • Most scientific work is measured on the Celsius scale except for work at extreme temperatures. • To convert: 0C + 273 = K

More Related