Chemistry Review

Properties of Glass and Soil

Physical and Chemical Properties

Physical 0Chemical

Physical and Chemical Changes

0Physical 0Chemical

Forensic Tests

0How do we determine order of tests?

0Broad Narrow

0Tests that alter or destroy evidence last

Metric System

0Based on powers of 100k h D b d c m0Liter, gram, meter

0Useful English to metric conversions

1 in = 2.54 cm1 m = 39.37 in1 pound = 453.6 g1 liter = 1.06 qt1 kg = 2.2 pounds1 mL = 1 cm3

PRACTICE

015 mm = ? cm 25 in = ? cm

025 km = ? m 50.0 m = ? ft

013 g = ? mg 200.0 lb = ? kg

00.050 L = ? mL 2.0 L = ? cm3

Temperature

0Measure of heat or kinetic energy

0Scale requires 2 reference points (MP, BP)

Weight and Mass

0W = m x g

0Not the same

0proportional

Density

0D = m/v

0 Intensive property

0Gas and liquid vary w/temp

Refractive Index

0Speed of light 0Waves slow when they come into contact with

another medium0Bending is a result of change in velocity – refraction

Refractive index = velocity of light in a vacuum velocity of light in

a medium0 Specific wavelength and temp

Crystalline vs Amorphous

0Arrangement of atoms0 Definite and orderly0 Random arrangement

Some other properties of light

0Double refraction0Birefringence

0Dispersion