1 / 14

Unit One: Review

Unit One: Review. Chemistry II. What is Chemistry?. Chemistry: The study of matter, its structure, properties, and composition, and the changes that matter undergoes a. Matter – has mass and takes up space. II. Graph – a visual display of information. 3 types : line, bar, and pie graph

nelia
Download Presentation

Unit One: Review

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. Unit One: Review Chemistry II

  2. What is Chemistry? • Chemistry: The study of matter, its structure, properties, and composition, and the changes that matter undergoes a. Matter – has mass and takes up space

  3. II. Graph – a visual display of information 3 types : line, bar, and pie graph A. Line Graph – shows how information changes over time, or to show continuous data

  4. Example: Day of the Week Temperature Sunday 81 Monday 86 Tuesday 82 Wednesday 79 Thursday 76 Friday 80 Saturday 74

  5. B. Bar Graph – Compares collected information in columns (non-continuous data)

  6. C. Pie Graph – shows how a total is broken into parts

  7. III. SI System – International System of Standards A. Base units: Mass – kg (only one with a prefix) Length – m Time – s B. Derived units – combinations of base units by multiplication or division ex: speed – m/s force = N = kg*m/s2

  8. C. Prefixes – - used to express big or small extremes Micro µ (1x106µm/m) Milli m (1x103mm/m) Centi c (1x102cm/m) Deci d (1x101dm/m) ------ DekadK (1x10-1dKm/m) Hecto h (1x10-2hm/m) Kilo k (1x10-3km/m) Mega M (1x10-6Mm/m)

  9. Which is heavier, a pound of lead or a pound of feathers?

  10. III. Density • Density – amount of matter present in a given volume of substance

  11. Practice: Suppose a student finds that 23.50 mL of a certain liquid weighs 35.062g. What is the density of this liquid? Density = mass = 35.063g = 1.492 g/mL volume 23.50 mL

  12. B. Density Determination 1. Submerge object in water and measure the volume of water it displaced Example: measuring a person’s % body fat

  13. C. Uses 1. Identification of substances

  14. 2. Specific Gravity – the ratio of the density of a given liquid to the density of water at 4 degrees C - because it is a ratio of densities, it has no units

More Related