1. Press the space bar to begin
The Balance
Press the space bar to begin

2. Designed by Tammy Crannie
The Balance
Designed by Tammy Crannie

3. What is the Balance used for?
***The Balance is used to accurately measure the mass of an object in grams.

4. Parts of the Balance

5. How to handle a Balance Arm Base
***When carrying the balance, you must always place
one hand under the base and one hand on the arm.
Never pick up the balance by the beam.

6. How to get started measuring Mass!
***
1.When beginning to measure mass, First slide all riders back to the zero point. Check to see that the pointer swings freely along the scale. The beam should swing an equal distance above and below the zero point. If it does not, Raise your hand and get the teachers attention. Do Not adjust the balance yourself.

7. Measuring Mass
***
Never put a hot object directly on the pan. Air currents developing around the hot object may cause errors in the mass you measure.
Never pour chemicals directly on the balance pan. Dry chemicals should be placed on paper or in a glass container. Liquid chemicals should be massed in glass containers.

8. Measuring the mass of your object
***
4. Place the object to be massed on the pan and move the riders along the beams, beginning with the LARGEST mass first. If the beams are notched, make sure all riders are in a notch before you take a reading. Remember, the swing should be an equal distance above and below the zero point on the scale.

9. Figuring the mass of the object
***
The mass of the object will be the SUM of the masses indicated on the beams.
If you are using a container to measure the mass of a chemical or other object, you must SUBTRACT the mass of that container from the total mass measured. This is called Tare Weight.

10. Check the mass of this object
Do you know the mass of this object?

11. Check your answer The top rider was at 20.0g
The middle rider was at g
The bottom rider was at g
The answer is the sum of all three = g

12. What’s the mass of this object?
Try this one
What’s the mass of this object?

13. Check your answer The top rider was at 50.0g
The middle rider was at g
The bottom rider was at g
The answer is the sum of all three = 153.7g

14. See if you know the answer to these questions!

15. Let’s discuss the answers
Answer =127g

16. Let’s discuss the answers
Answer = 670.7g

17. Let’s discuss the answers
Answer = 53.4g

18. Let’s discuss the answers
Answer = 344.2g

19. Let’s discuss the answers
Answer = 1.6g

20. Now practice on your own!