1. List an example of things measured by mass, volume, and length.
Agenda for Wednesday Sept 24th
Go over test
Measurement notes
Measurement practice

2. Accuracy & Precision Accuracy: Precision:
Freedom form mistakes or errors; Correctness
Precision:
The ability to repeat; Repeatability

4. Units of Measurement International System of Units (SI) Quantity
Base Unit
Abbreviation
Length
Meter m
cm, mm, km
Mass
Kilogram kg
g, mg
Time
Second s
Temperature
Kelvin K
**Celsius (C)

5. Linear Measurement (straight lines)
Length, Width, Height
Tool:
Meter stick, ruler
Base unit of measurement:
Meters (m)

7. Area How much surface an object covers Units: Formula: m2, cm2 , etc.
A = L x W

8. Volume How much space an object takes up Two types:
Regular and irregular
Regular solids are box like
Volume is found by measuring length, width, and height
The volume of irregular objects is found by water displacement

9. Volume (cont.) Tool: Units of measurement: 1cm3 = 1ml
Regular = ruler or meter stick
Irregular = graduated cylinder
Units of measurement:
m3, cm3 (for solids)
L , ml (for liquids)
1cm3 = 1ml

10. Volume of Regular Objects
Boxes:
V = L x W x H
Spheres
Formula : V = 4/3 πr3
Cylinder
Formula: V = πr2 h
*π = 3.14

11. Measuring spheres/circles
Measure end to end
Use paper on edge of spheres
Measured diameter we need radius
Radius = ½ diameter
So: if d = 10 then r = 5

13. How many decimals?

15. What is accuracy? Precision?
Agenda for Thursday Sept 25th
Go over test
Measurement pre-lab
Measurement lab

16. Volume lab
Rounding
What was the smallest number of digits in any of my measurements?
You would then round off your calculated value to the smallest number of digits in your measurements.

17. Example:
If L = 2.11 cm, W = cm and H = 7.10cm, 7.10cm has the smallest number of digits so your calculated value would be rounded to three digits.
2.11 x x 7.10 = would be rounded to 64.7

18. Three students reported the length of a pencil to be 12 cm, 12
Three students reported the length of a pencil to be 12 cm, 12.0 cm, and cm. Do all three readings contain the same information? Which one has the most? Why?
Agenda for Friday Sept 26th
Measurement lab

19. How do you decide how much water is in the cylinder?
How much water is there?
Agenda for Monday Sept 29th
Volume of Irregular objects

20. What is the volume of a box with the following dimensions: Width = 3
What is the volume of a box with the following dimensions: Width = 3.45 Length = 2.56 Height = 1.89
Agenda for Tuesday Sept 30th
Finish Measurement notes
Metric Conversion Notes
Density

22. Mass Definition: Tool: Base unit: 1g = 1cm3 for water only
The amount of matter in an object
Tool:
Triple beam Balance
Base unit:
Grams (g)
A penny has the mass of about 1g
1g = 1cm3 for water only

23. Making a connection When you use water (this works only for water)
1 ml = 1 cm3 = 1 g

25. Weight Definition: Tool: Base unit:
The gravitational pull on an object
Tool:
Scale
Base unit:
Newton (N)

26. Mass Vs. Weight

27. Temperature Definition: Tool: Base unit:
Measurement of the average kinetic energy of molecules
Tool:
Thermometer
Base unit:
Celsius (co) and Kelvin (ko)

29. Density
Def. – ratio of the mass of a substance to the volume of a substance
Formula: D = m/V
Density = mass/volume
Units: g/cm3
Low density means atoms are not as packed together

30. Density Density determines whether an object will float or sink
Less dense objects float
Water has a density of 1 g/cm3
Use density to find substances
lab

31. Density Problems
If 12.0 cm3 has a mass of 9.17 g, what is the density?
If an object has a density of 4.2 g/cm3 and a mass of 30 g, what is its volume?

32. Explain how you would find the volume of an irregular shaped object.
Agenda for Monday Jan 13th
Finish notes
Go over worksheet
Mass lab

33. What is the difference between mass and weight?
Agenda for Tuesday Jan 14th
QUIZ
Density
Start lab
TEST TUESDAY

34. What is density?
Agenda for Wednesday Jan 15th
Demo
Lab/worksheet