# Making Measurements by DVfdoh

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```									Making Measurements

Ms. Lockhart
Chemistry
GPS Standard
• SCSh4   • Students will use tools and instruments
for observing, measuring, and
manipulating scientific equipment and
materials.
– a. Develop and use systematic procedures for
recording and organizing information.
– b. Use technology to produce tables and
graphs.
– c. Use technology to develop, test, and revise
experimental or mathematical models.
Distance
• Distance              • The measurement of
change from one position
to a new position.

• SI Unit (metric       • Base Unit: meter
system)               • Prefixes: centimeters,
kilometers.

• Instruments
• Ruler, meter stick
Mass
• Mass            • The amount of matter an
object contains.

• SI Unit         • Base Unit: Grams
• Prefixes: centigrams,
kilograms

• Triple Beam Balance and
• Instruments       Analytical Balance
Volume
• Volume           • The amount of space
an object takes up.

• Base Unit: Liters
• SI Unit
• Prefixes: centiliters,
kiloliters

cylinder, ruler.
Measuring Volume
1. Using Instruments      • Pour liquid in container.
Measure.

• Pour liquid in container.
2.   Using Displacement     Measure.
Measure.
• Subtract the difference.

3.   Using Distance       • Measure the length, width and
height of an object.
• Multiply all numbers together.
– LxWxH
Temperature
• Temperature         • The average kinetic
energy of a substance.

• Base Unit: Kelvins
• SI Unit               (°K).
• Other unit: Celsius
(°C).

• Instruments         • Thermometer.
Percent Error
• Percent Error      • The measure of the accuracy of

• How do you         • Subtract the predicted results
find percent         (theoretical) from the lab results
error?               (actual/experimental)
• Divide by the theoretical results
• Multiply by 100
– The unit is ‘%’
– Warning: numbers can be positive or
negative.
Study Guide
•   The four units of measurement (Section 2.1)
•   The definition of mass, distance and volume (Section 2.1)
•   The instruments used to measure (Lab Information)
•   The accuracy of an instrument (Section 2.3)
•   How to find volume of objects with odd shapes (Lab Information)
•   Percent error (Section 2.3)
•   How to convert (change) units from one unit to the next (Section 2.2)
•   Extra Practice for Quiz: p. 45(19) and p. 49 (32-33)

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