Final answer:
The smaller objects made of rock and metal orbiting between Jupiter and Mars are known as asteroids.
Step-by-step explanation:
The smaller objects in the solar system made of rock and metal that most commonly orbit between Jupiter and Mars are asteroids. Asteroids are remnants from the solar system's initial population before the planets formed. They are rocky bodies that orbit the Sun similarly to planets but on a much smaller scale. The asteroid belt, where most of these asteroids are found, contains various asteroids, including the three main types: C-type (carbonaceous), S-type (stony), and M-type (metallic). The study of asteroids is not only important for understanding the solar system's history but also for planetary defense, as these objects could potentially collide with Earth.