1. Ask a question: Which pile has more gold in it?
Form a hypothesis: the left pile has more gold in it
Collect data to support your hypothesis

2. How will you collect your data?
What are you going to measure?
What tools/instruments will you use?

3. Which of the following is the best instrument to use to answer our question?

4. Mass
The amount of matter (stuff) in an object.

5. Mass is not the same as weight
Weight is a measure of the amount of gravity pulling down on an object.
The moon has less gravitational pull, so your weight changes. But the amount of matter in you stays the same.
Your weight changes if you go to the moon, your mass does not.
Why?

6. Mass doesn’t change from planet to planet

7. Kilogram Prototype Image - http://en.wikipedia.org/wiki/Kilogram
Metric Units kg g cg mg
The base unit of mass in the metric system is the kilogram and is represented by kg.
Standard: 1 kilogram is equal to the mass of the International Prototype Kilogram (IPK), a platinum-iridium cylinder kept by the BIPM at Sèvres, France.
Kilogram Prototype
Metric Units
1000 milligrams (mg) = 1 gram (g)
1000 grams (g) = 1 Kilogram (kg)
Kilogram Prototype Image -

8. How do I measure mass?
We will be using triple-beam balances to find the mass of various objects.
The objects are placed on the scale and then you move the weights on the beams until you get the lines on the right-side of the scale to match up.

9. _______ + ______ + _______ = ________ g
Once you have balanced the scale, you add up the amounts on each beam to find the total mass.
What would be the mass of the object measured in the picture?
_______ + ______ + _______ = ________ g

10. Measuring Mass – Triple-Beam Balance
1st – Place the object on the scale.
2nd – Slide the large weight to the right until the arm drops below the line. Move the rider back one groove. Make sure it “locks” into place.
3rd – Repeat this process with the top weight. When the arm moves below the line, back it up one groove.
4th – Slide the small weight on the front beam until the lines match up.
5th – Add the amounts on each beam to find the total mass to the nearest tenth of a gram.

11. You try it! (Zero the balance first!)
1st – Place the object on the scale.
2nd – Slide the large weight to the right until the arm drops below the line. Move the rider back one groove. Make sure it “locks” into place.
3rd – Repeat this process with the top weight. When the arm moves below the line, back it up one groove.
4th – Slide the small weight on the front beam until the lines match up.
5th – Add the amounts on each beam to find the total mass to the nearest tenth of a gram.

12. Re-Think your Drink
Problem: How much sugar is found in commonly consumed beverages?

13. American Heart Association
Recommends no more than 12 g of sugar per day for kids
20 g for women
36 g for men
Are you getting too much added sugar in your drinks?

14. Procedures Chose two beverage containers
Hypothesize which one has the most sugar and record your guess.

15. 3. Use the nutrition labels to complete the charts
Servings per container
Sugars (g)
Total Sugar = servings per container x sugar amount (4 x 26 = 104g)

16. Safety Follow all directions Clean up your workspace when finished
Do NOT taste any chemicals in the lab.
Notify teacher of broken glassware.

17. Find the mass of sugar
4. Enter the total mass of sugar (from page 1) into section D 5. Enter the mass of the EMPTY beaker into section E 6. Add D+E 7. Set the weights to the total seen in section F 8. Scoop sugar into beaker until it balances. 9. Carefully pour into the bag and seal.

18. Make your display Names on the back Glue on the container
Fill your bag with the correct mass of sugar
Staple it to the paper
Fill in the chart
Cut and tape onto the paper

19. Conclusion Questions What were the two beverages?
Was your hypothesis supported?
Which beverage had the most sugar?
What evidence do you have to support that claim?
Were you surprised by the amount of sugar? Explain
Explain how to use a triple beam balance.

20. Re-Think your Drink https://www.youtube.com/watch?v=XHzLvxJF568
How much sugar is in your favorite drinks?
Can you eat the same amount of sugar as you find in a drink?

22. Should sugar be taxed? Will this reduce consumption and increase health?