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