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10. Tools Used to Measure
A. Length (m)– straight line distance between two points.
for small measurementsNot the most accurate
Ways to measure length:1. Ruler
For long measurementsNot the most accurate
2. Retractable Metal Tape
used for small diameters and thickness of thin materials. Accurate tool
3. Micrometer and Vernier Caliper
B. Volume – amount of space a substance occupies
units are often expressed as cubic meters (m3) or cubic centimeters (cm3 = cc )
Volume of irregular shaped objects can be measured by water displacement
1. Solid (such as a brick) – woulduse V = l x w x h
2. Liquid - measure capacity in a container.
Most common units are ml and liters.
An important conversion is: 1 mL = 1 cm3 = 1 cc
Ways to measure liquids:a) Graduated Cylinder
accurate device
b) Pipettes – accurate device
c) Beaker and flask not as accurate
C. Temperature – measure of the amount of molecular movement
Important Temperatures to MemorizeCentigrade
(C°)Fahrenheit
(F°)Results
0° 32° Water freezes
37° 98.6° Average Body Temp
21° 70° Room Temp
100° 212° Water boils