1. Chapter 2

15. They are the SAME length!

23. A Duck, Bunny, or BOTH?

24. This image contains a picture and a word. Do you see both of them?

26. Your brain!

27. Your right brain tried to say the color, but your left brain was reading the word.

29. They are all the same height!

30. The Landscape of Faces

31. How about now?

38. SI Base Units Quantity Quantity Symbol Unit Name Unit Abbreviation Length l meter m Mass m kilogram kg Time t second s Temperature T kelvin K Amount of substance n mole mol Electric current I ampere A

39. SI Prefixes Prefix Unit Abbreviation Meaning/Example mega M 1Mm = 1,000,000m kilo k 1km = 1,000m hecto h 1hm = 100m deka da 1dam = 10m deci d 1m = 10dm centi c 1m = 100cm milli m 1m = 1,000mm micro μ 1m = 1,000,000 μ m nano n 1m = 1,000,000,000nm pico p 1m = 1,000,000,000,000pm

40. Derived SI Units Quantity Quantity Symbol Unit Unit Abbreviation Derivation Area A Square meter m 2 length x width Volume V Cubic meter m 3 length x width x height Density D Kilograms per cubic meter kg/m 3 mass / volume Molar Mass M Kilograms per mole kg/mol mass / amount of substance Concentration c Moles per liter M amount of substance / volume Molar Volume V m Cubic meters per mole m 3 /mol volume / amount of substance Energy E joule J force x length