Lessons 12: Choice of Units

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Presentation transcript:

Lessons 12: Choice of Units Goal: determine appropriate units for various measurements and rewrite measurements based on new units. Warm Up Exercises 1-3 for Lesson 12

We Do Gigaelectronvolt Is kilogram the best measure for the mass of a proton? 1 gigaelectronvolt = 1.783 x 10-27 kg Mass of 1 proton = 1.672622 x 10-27 kg Convert the mass of a proton from kilograms to gigaelectronvolts.(Exercise 4)

1 gigaelectronvolt = 1.783 x 10-27 kg Mass of 1 proton = 1.672622 x 10-27 kg Let x be the number of gigaelectronvolts equal to the mass of a proton.

Light-years (Exercise 5 Lesson 12) You Try

Lessons 12: Choice of Units Class Work Lesson 12 Exit Ticket Homework Lesson 12 Problem Set #1-3

Lesson 13: Comparison of Numbers in Scientific Notation Comparing Magnitude Goal: compare numbers expressed in scientific notation.

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Lesson 13: Comparison of Numbers in Scientific Notation You Try Exercise 1 Fornax Dwarf is closer because a number to the 5th magnitude is smaller than a number to the 6th magnitude.

Lesson 13: Comparison of Numbers in Scientific Notation You Try Exercise 2 The tau lepton has a longer average lifetime because 10-13 has a greater magnitude than 10-17.

Lesson 13: Comparison of Numbers in Scientific Notation Class Work Lesson 13 Exit Ticket Homework Lesson 13 Problem Set #1-3