1. Measuring Length & Mass By: Brianna Shields September 13, 2005

2. DO NOW • Lab Safety Quiz • You have 10 minutes to finish • The five pieces of equipment are on the front counter • Place your quiz on the counter when finished

3. Definition Distance between two points Length

4. Tool Ruler or meterstick Length

5. Label units Centimeter (cm) Length

6. Tips Line object up at zero mark Measure with decimals (no fractions) Be accurate Label your answer Length

7. Example • What is the length of the object at left?

8. Example • What is the length of the object at left?

9. What is the length of the object at left? Example

10. Definition Amount of matter in an object Mass

11. Tool Triple beam balance Mass

12. Label units Grams (g) Mass

13. Using a tbb 1. Zero the balance (all masses left)

14. Using a tbb 2. Move 100 g mass first- until balance tips, then slide mass one spot left

15. Using a tbb 3. Move 10 g mass next until balance tips, then slide mass one spot left

16. Using a tbb 4. Move 1 g mass last until balance tips, then slide mass one spot left

17. Using a tbb 5. Add up all three masses to find the total mass

18. Tips Be accurate Use decimals, no fractions Label your answer correctly Mass

19. Example • What is the mass of the object to the left?

20. Example • What is the mass of the object to the left?

21. Practice • Work with your lab partner • Complete the length and mass practice questions in your handout • We will go over the correct answers at the end of the period

22. Hands On: Length

23. Hands On: Mass

24. Practice: Length & Mass

25. Practice: Length & Mass

26. Practice: Length & Mass