Unit 1, Lesson 5: Significant Figures

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Presentation transcript:

Unit 1, Lesson 5: Significant Figures Hand out notes sheet as students come in

Significant Figures Go over notes sheet – 10 min

Quick Check Which would you use to measure 20.0 mL? Quick Check – 5 min

Quick Check Using this scale, to how many significant figures could a person weighing around 70 kg determine their mass? Quick Check – 5 min 3 4

Calculator Tips The “Exp” button means “x10^” If you have a number like 0.0000000453 showing on the screen, don’t assume it ends there!

Brain Break!

Sig Fig Race! Form a team of three people. As a team, you will race against other teams to hold up cards that show the correct answer to each question. Each team is permitted ONE calculator, and you must switch which team member is using the calculator each round. Here we go... *Need 11 large index cards per team. 10 min game.

Sig Fig Race! How many significant figures are in 1,500? 10 min

Sig Fig Race! How many significant figures are in 1,500.01? 10 min

Sig Fig Race! How many significant figures are in 0.00673927? 10 min

Sig Fig Race! How many significant figures are in 10? 10 min

Sig Fig Race! How many significant figures are in 1308.7? 10 min

Sig Fig Race! What is 60 + 83.2, using significant figures? 10 min

Sig Fig Race! What is 0.158 + 0.4, using significant figures? 10 min

Sig Fig Race! What is 0.11 – 2.2, using significant figures? 10 min

Sig Fig Race! What is 494 + 30, using significant figures? 10 min

Sig Fig Race! What is 9.8070 – 404.08, using significant figures? 10 min

Sig Fig Race! What is 610 ÷ 9.1, using significant figures? 10 min

Sig Fig Race! What is 4.59 X 3.201, using significant figures? 10 min

Sig Fig Race! What is 0.009 X 19.5, using significant figures? 10 min

Sig Fig Race! What is 30700 ÷ 67000, using significant figures? 10 min

Sig Fig Race! What is 851.796 X 742.95, using significant figures? 10 min

Sig Fig Race! Give a number between –1 and 1 that has 5 significant figures. 10 min

Sig Fig Race! Give a number greater than 100 that has 2 significant figures. 10 min

Sig Fig Race! Give a number that is 4 digits but only has 3 significant figures. 10 min

Sig Fig Race! Give a number between 5 and 6 that has 3 significant figures. 10 min

Sig Fig Race! Give a number less than 40 that has 6 significant figures. 10 min

Sig Fig Race! And the winners are...

Homework: Significant Figure Calculations worksheet