Stimulation is the encouragement of development or the cause of activity generally. For example, The press provides stimulation of political discourse. An interesting or fun activity can be described as stimulating, regardless of its physical effects on senses. Stimulate means to act as a stimulus to; stimulus means something that rouses the recipient to activity; stimuli is the plural of stimulus. A particular use of the term is physiological stimulation, which refers to sensory excitation, the action of various agents or forms of energy on receptors that generate impulses that travel through nerves to the brain (afferents).
Scarabs were made in a wide variety of materials, such as carnelian, lapis lazuli, basalt, limestone, malachite, schist, serpentine, turquoise, colored glass, and alabaster. Pottery scarabs were also produced in terra-cotta molds, carved when dry and different colored glazes applied.
Asteroids are made of rock and metal and broken away pieces of planets. They are grouped into three categories: Stony, Iron-Nickel, and a mixture of the two.Most asteroids that we know about fall into the first category, and are made of Silicates. A small percentage are Iron-Nickel.The rest form the third type. I believe that they are made of rocky bits left over from the formation of the inner planets. The run-of-the-mill asteroid is just one kilometer long.hey are grouped into three categories: Stony, Iron-Nickel, and a mixture of the two. Most asteroids that we know about fall into the first category, and are made of Silicates. A small percentage are Iron-Nickel.