Beaver teeth are so sharp that Native Americans once used them as knife blades. Beavers eat tree bark and the soft tissue, that lies beneath the bark. Trees they seem especially fond of are willows, maples, poplars, beeches, birches, alders, and aspens. Mr. Kaiser’s beaver log was hallowed out like a cylinder with pointed ends. This log was accidently placed on the bomb fire and burned which caused physical and chemical reactions and changes. Let’s talk about some of the physical and chemical properties. Physical properties can be observed or measured without changing the composition of the matter. The beaver’s log had the following physical properties. It was shaped like a cylinder with pointed ends, brown and rough. The beaver ate the bark and the soft tissue in order to receive nourishment. Chemical properties of matter describe its “potential” to undergo some chemical change or reaction by virtue of its composition. As the beaver log burns, it goes through three phases. The first phase is the evaporation of water. As the wood is heated moisture evaporates quickly consuming heat energy in the process. The second phase is the emission of smoke. As the wood heats up, it starts to smoke. The smoke is the visible result of the destruction of the solid wood as it vaporizes into a cloud of combustible gases. The smoke will burn if the temperature is high enough and oxygen is present. The third and final phase is the charcoal phase. As the fire grows and most of the gasses have vaporized out of the wood, charcoal remains. All three phases of wood burning occur at the same time. The wood gases can be flaming and the edges of the pieces can be glowing red as charcoal burns, while moisture in the core of the wood is evaporating. The wood went through both a physical and chemical change. A chemical change can produce heat, light and smoke. The