Identify and describe dwarf planets, asteroids, and comets in our solar system

Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system Example: the Asteroid belt

Dwarf Planets, the International Astronomical Union characterizes a planet as being in orbit  around the sun, has enough gravity to maneuver its mass into an adjusted shape (hydrostatic balance), and has freed its circle from other, littler articles. This last standard is where planets and dwarf planets contrast. A planet's gravity either draws in or drives away the littler bodies that would somehow meet its circle; the gravity of a dwarf planet isn't adequate to get this going Example: Pluto, Ceres

Comets are cosmic snowballs of solidified gases, rock and residue that circle the Sun. At the point when solidified, they are the size of a humble community. At the point when a comet's circle brings it near the Sun, it warms up and regurgitates residue and gases into a monster gleaming head bigger than most planets. The residue and gases structure a tail that extends away from the Sun for many miles.  Example: ISON, they are also know as shooting stars

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.