1. Using Science Tools in Life Science
Triple Beam Balance
Length
Area
Volume
Temperature

2. Lets Review from 7th grade…
Lets Review from 7th grade…. How to Use the Triple Beam Balance and the Metric Ruler

3. Triple Beam Balance
The triple beam balance is used to measure mass, or the amount of matter in an object. Mass is measured in units called grams. Larger masses would be measured in kilograms.
What’s this?

4. Handling a TBB: When carrying the balance you should….
make sure that all of the riders are back to the zero point .
carry the balance using two hands.

5. Handling a TBB: When using the balance you should…
Zero the balance before you determine the mass of any substance.
Slide all of the riders back to the zero point.
You must repeat this procedure every time you use the balance.

6. How to Read a Triple Beam Balance
FIRST: Move the 100 gram (largest) rider along the beam to the right, one notch at a time, until the pointer drops below the zero balance point. Now, move the rider one notch back to the left.

7. How to Read a Triple Beam Balance
SECOND: Move the 10 gram (middle) rider along the beam to the right, one notch at a time until the pointer drops below the zero balance point. When this happens, move the 10 gram rider back one notch to the left.

8. How to Read a Triple Beam Balance
THIRD: The front beam has no notches.  Use the tip of your pencil to gently move the 1 gram (smallest) rider along the beam to the right until the point lines up with the zero balance mark.
FINALLY: To find the mass of the object on the pan, simply add the numbers from the three beams.

9. How to Read a Triple Beam Balance
EXAMPLE #1   · the largest rider is on the 0g mark, · the middle rider is on the 90g mark, · and the smallest rider is on the ninth line past the 7g mark for a total of
97.9 grams. This is the mass of the object.

10. EXAMPLE # 2 · the largest rider is on the 400g mark, · the middle rider is on the 70g mark, · and the smallest rider is on the first line past the 5g mark for a total of g. This is the mass of the object.

11. Please be gentle with the triple beam balances. They cost $$$.
When students have finished using the balances, they need to move all of the riders to the left so that the pointer is at zero.
Please be gentle with the triple beam balances. They cost $$$.

12. Demo Sample of Triple Beam Balance

13. Measuring Length
To measure length, or the distance between two points, the unit of measure is the meter (m). The distance from the floor to a doorknob is approximately one meter.
Long distances, such as the distance between Franklinville and Philadelphia, are measured in kilometers (km).

14. Measuring Length
Small lengths are measured in centimeters (cm) or millimeters (mm).
Scientists use metric rulers and meter sticks to measure length.

15. Measuring Area and Volume
Area is measured by multiplying the
length x width. It can be expressed in square meters (m2) (cm2).
Volume is measured by multiplying the
length x width x height. It can be expressed in cubic meters (m3) (cm3).

16. Sample Problem Measuring Area
AREA The length of the shoebox is 40 cm. The width of the shoebox is 20 cm. The area is 800 cm2 (800 square centimeters).

17. Sample Problem Measuring Volume
Volume The length of the shoebox is 40 cm. The width of the shoebox is 20 cm. The height of the shoebox is 10 cm. The volume is 8000 cm3 (8000 cubic centimeters). Mass & Volume

23. Review of Concepts:
Think METRIC system not ENGLISH system! Mass is measured in units known as _________. When measuring length use the base unit of _____. Measuring a small object (cell phone) use ______. Measuring a large object (around track) use____. Area Formula= Volume Formula=