Spice is a dried plant added to food for flavor.In cooking, spices differ from herbs which are leafy greens.Spices can also be used for religion, medicine or cosmetics.[from wikipedia]

Chili powder is the dried, pulverized fruit of one or more varieties of chili pepper, sometimes with the addition of other spices (also sometimes known as chili powder blend or chili seasoning mix).[from wikipedia]

Black pepper (Piper nigrum) is a flowering vine in the family Piperaceae, cultivated for its fruit, known as a peppercorn, which is usually dried and used as a spice and seasoning. When fresh and fully mature, it is about 5 mm (0.20 in) in diameter and dark red, and contains a single seed, like all drupes.[from wikipedia]

Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in its natural form as a crystalline mineral is known as rock salt or halite. Salt is present in vast quantities in seawater, where it is the main mineral constituent.[from wikipedia]

Spice mixes are blended spices or herbs. When a certain combination of herbs or spices is called for in many different recipes (or in one recipe that is used frequently), it is convenient to blend these ingredients beforehand. Blends such as chili powder, curry powder, herbes de Provence, garlic salt, and other seasoned salts are traditionally sold pre-made by grocers, and sometimes baking blends such as pumpkin pie spice are also available. [from wikipedia]