1. AIM: How is the volume of irregularly shaped objects measured?
VOCABULARY
Water displacement method
Irregularly shaped object
11/13/2018

2. To successfully measure volume of irregularly shaped object.
OBJECTIVE
To successfully measure volume of irregularly shaped object.
11/13/2018

3. Volume is the amount of space an object takes up.
DEFINITION
What is volume ?
Volume is the amount of space an object takes up.
11/13/2018

4. What is a regularly shaped object?
In the Metric System
What is a regularly shaped object?
…an object whose length, width, and height can be accurately measured with a ruler !
11/13/2018

5. In the Metric System
When we calculate the volume of a regularly shaped object, what unit do we use?
m3 or cm3
11/13/2018

6. What is an irregularly shaped object?
In the Metric System
What is an irregularly shaped object?
…an object whose length, width, and height cannot be measured with a ruler !
11/13/2018

7. For liquids, the standard unit of measure for volume is …
In the Metric System
For liquids, the standard unit of measure for volume is …
liter
11/13/2018

8. What is this called?
A rock
11/13/2018

9. How can you measure its volume
Can you measure its height, width, and length?
11/13/2018

10. So how do you measure its volume
Water displacement method
Need a graduated cylinder
11/13/2018

11. Water Displacement Method
Using your graduated cylinder
Step 1: measure the volume of water
11/13/2018

12. Water Displacement Method
What is the volume of the water?
7 ml
11/13/2018

13. Water Displacement Method
Step 2: insert the rock in the water
Re-measure the water in the cylinder!
11/13/2018

14. Water Displacement Method
What is volume now?
9 ml
11/13/2018

15. Water Displacement Method
Step 3: Subtract the first measurement from the second.
11/13/2018

16. Water Displacement Method
The difference in the measurements is the volume of the rock in ml
11/13/2018

17. Water Displacement Method
Even though we used liquid to measure the volume of the rock
cm3 3
11/13/2018

18. How do you measure the volume of an irregularly shaped object?3
How do you measure the volume of an irregularly shaped object?
With a graduated cylinder
Using the water displacement method
11/13/2018

19. 3
Is the water displacement method an example of a direct or an indirect measurement?
Indirect !!
11/13/2018

20. Give an example of an irregularly shaped object?3
Give an example of an irregularly shaped object?
A rock
A screw
A penny
A marble
11/13/2018

21. Class
Work
Calculate
the volume
11/13/2018

22. Home
Work
Internet Questions
Work Sheet
11/13/2018

23. Lets Practice reading a graduated cylinder:
What is the volume here?
What is the increment?
11/13/2018

24. Lets Practice reading a graduated cylinder:
What is the volume here?
What’s the increment?
11/13/2018

25. Lets Practice reading a graduated cylinder:
What is the volume here?
11/13/2018

26. a milliliter is the SAME SIZE as a cubic centimeter
Basic Terminology
1 liter = 1000 milliliters
1 l = 1000 ml
a milliliter is the SAME SIZE as a cubic centimeter
or “cc” for short
11/13/2018