Marcus attends a night program at an observatory to learn more about the solar system. He learns that the solar system contains many objects in addition to the palnets and the sun. Which of the following is the smallest object?

a

asteroid

b

comet

c

moon

d

meteoroid

Answer: D meteoroid

Explanation:

Meteoroid is the smallest among them. It is a tiny asteroid or the broken-off crumb of comets and sometimes planets. It ranges in size from a grain of sand to boulders 3 feet (1 meter) wide. When meteoroids collide with a planet's atmosphere, they become meteors. If those meteors survive the atmosphere and hit the planet's surface, their remains are called meteorites