Lesson 25

You Light Up My Life

Classifying Substances

Substances can be grouped into general categories: Solubility- the ability to dissolve, and Conductivity- describes how well a substance transmits electricity

Dissolve - to disperse evenly into another substance

We tested substances' solubility by dropping it into some water and seeing if it dissolved. Then to test conductivity we used a battery connected to wires and a lightbulb to see if putting both ends of the wire to the substance would light up the lightbulb.

Types of Substances

Substances that don't light up the lightbulb

                                 -made up of Carbon, Hydrogen, and Oxygen

                                 -entirely nonmetal atoms

                                 -combination of metals and nonmetals in solid forms

Substances that do light up the lightbulb

                                  -has at least one metal atom

                                  -compound of metals and nonmetals when they are dissolved

                                  -metal solids

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