asteroid: an object like a very large rock that goes around the sun like a planet.

Reptile: an animal that produces eggs and uses the heat of the sun to keep its blood warm.

arthropod: a type of animal with no spine, a hard outer skin, legs with bones joined together, and a body divided into different parts, for example a spider, crab, or ant.

skunks: a small, black and white North American animal that makes a strong, unpleasant smell as a defence when it is attacked.

saber-toothed cats: any of various extinct carnivorous cats (such as genus Smilodon) that were widely distributed in the Oligocene through the Pleistocene of both the Old and New World, are characterized by elongation of the upper canines.

Granite: a very hard, grey, pink, or black rock, used for building.

Mammal: any animal of which the female feeds her young on milk from her own body. Most mammals give birth to live young, not eggs.

earth: the planet third in order of distance from the sun, between Venus and Mars; the world on which we live.

Prehistoric Times: In this sense, prehistory covers the period of time that extends from the appearance of the first hominids, ancestors of Homo Sapiens, to the production of the first written documents, dating from the year 3,300 a. of C

Ocean: a very large area of sea

coyotes: a small wild animal like a dog that lives in North America.

rabbits: a small animal with long ears and large front teeth that moves by jumping on its long back legs, or the meat of this animal eaten as food.

chemical: any basic substance that is used in or produced by a reaction involving changes to atoms or molecules.