1. Reading the Graduated Cylinder
Reading vol notes R4

2. Calculating volume Find the LENGTH, WIDTH, & HEIGHT of the object
Multiple the LENGTH, WIDTH, & HEIGHT
Cube the units of measurement (cm^3)
Example:
Volume = 3 cm X 6 cm X 4 cm
Volume = 72 cm^3 or 73 cubic centimeter cm

3. Reading the Graduated Cylinder
Liquids in glass and some plastic containers curve at the edges
Changing the diameter of the cylinder will change the shape of the curve
This curve is called the MENISCUS

4. Reading the Graduated Cylinder
Your eye should be level with the top of the liquid
You should read to the bottom of the MENISCUS

5. Reading a graduated cylinder’s volume
From above meniscus
WRONG!!!!!
From below meniscus
WRONG!!!!!

6. Reading a graduated cylinder’s volume
From the side of the meniscus
CORRECT!!!

7. Measuring Volume What causes the meniscus?
A concave meniscus occurs when the molecules of the liquid attract those of the container. The glass attracts the water on the sides.
Top Image: Bottom Image:

8. Practice Reading the Graduated Cylinder
What is this reading?
18.0 ml

9. Practice Reading the Graduated Cylinder
What is this reading?
36.5 ml

10. Take notes in to R4 starting here

11. Calculating volume Find the LENGTH, WIDTH, & HEIGHT of the object
Multiply the LENGTH, WIDTH, & HEIGHT
Cube the units of measurement (cm^3)
Example:
Volume = 3 cm X 6 cm X 4 cm
Volume = 72 cm^3 or 72 cubic centimeter cm

12. Reading volume in a graduated cylinder
1. Figure out the intervals between the hash marks
2. Read the bottom of the meniscus

13. End of notes

14. Practice Reading the Graduated Cylinder
What is this reading?
43 ml

15. Practice Reading the Graduated Cylinder
What is this reading?
47.0 ml

16. Practice Reading the Graduated Cylinder
What is this reading?
61 or 61.2 ml

17. What is the volume?
Length = 3 cm
Width = 2 cm
Height = 4 cm

18. Reading volume

22. Extra slides

23. Measuring Volume
We will be using graduated cylinders to find the volume of liquids and other objects.
Read the measurement based on the bottom of the meniscus or curve. When using a real cylinder, make sure you are eye-level with the level of the water.
What is the volume of water in the cylinder? _____mL
What causes the meniscus?
A concave meniscus occurs when the molecules of the liquid attract those of the container. The glass attracts the water on the sides.
Top Image: Bottom Image:

24. Measuring Solid Volume
We can measure the volume of irregular object using water displacement.
Amount of H2O with object = ______ About of H2O without object = ______ Difference = Volume = ______
Click here for an online activity about volume. Choose Lessons  Volume & Displacement

25. Measuring volume of an irregularly-shaped object
For example, if there is 85ml of water in a graduated cylinder and you add an object, then the volume of the water and the object is 92ml. What is the volume of the object?
92ml (volume of water with object submerged)
-85ml (volume of just the water)
7ml (volume of object)