10. Tools Used to Measure. A. Length (m)– straight line distance between two points.
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Transcript of 10. Tools Used to Measure. A. Length (m)– straight line distance between two points.
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