East of the 100th meridian, the climate is humid continental in northern areas (locations above 40 north latitude), to humid temperate from the lower Midwest eastward to the middle Atlantic coast regions, to humid subtropical in the Gulf and south Atlantic regions.
Matter can be classified according to physical and chemical properties. Scientists can observe physical properties without changing the composition of the substance, whereas chemical properties describe the tendency of a substance to undergo chemical changes (chemical reactions) that change its chemical composition.
PS, love your pfp :)