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

2. Significant Figures
Go over notes sheet – 10 min

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

4. 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

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

6. Brain Break!

7. 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.

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

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

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

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

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

13. Sig Fig Race!
What is , using significant figures?
10 min

14. Sig Fig Race!
What is , using significant figures?
10 min

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

16. Sig Fig Race!
What is , using significant figures?
10 min

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

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

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

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

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

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

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

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

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

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

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

28. Sig Fig Race!
And the winners are...

29. Homework:
Significant Figure Calculations worksheet