Granite: a very hard, grey, pink, or black rock, used for building.
Noun My kitchen is granite.
Limestone: a white or light grey rock that is used as a building material and in the making of cement.
Noun Limestone fragments and a few silicified grains.
Marble: a type of very hard rock that has a pattern of lines going through it, feels cold, and can be polished to become smooth and shiny.
Noun Lower surface of thorax testaceous and that of abdomen marbled dark brown on a pinkish ground..
Paleontologist: the scientific study of organisms that lived on earth before there were written records, esp. by examining fossils.
Noun when I grow up I want to be a paleontologist.
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
Noun How interesting the history of prehistoric times.
Amphibian: an animal, such as a frog, that lives both on land and in water but must produce its eggs in water.
Noun Salamanders, frogs, and other amphibian life are particularly sensitive to extreme pH levels.
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.
Noun Of the arthropod animals, the one I like the most is the scorpion..
Bacteria: very small organisms that are found everywhere and are the cause of many diseases.
Noun Some bacteria can only live in anaerobic conditions.
Insect: a type of very small animal with six legs, a body divided into three parts and usually two pairs of wings, or, more generally, any similar very small animal.
Noun Ants, beetles, butterflies, and flies are all insects.
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.
Noun Humans, dogs, elephants, and dolphins are all mammals, but birds, fish, and crocodiles are not.
Reptile: an animal that produces eggs and uses the heat of the sun to keep its blood warm.
Noun Snakes, turtles, and crocodiles are all reptiles.
Worm: a small animal with a long, narrow, soft body without arms, legs, or bones.
Noun The vet says our dog has worms.
asteroid: an object like a very large rock that goes around the sun like a planet.
Noun Scientists are hoping an asteroid will clue them in about early life on earth.
earth: the planet third in order of distance from the sun, between Venus and Mars; the world on which we live.
Noun Theories abound about how the earth began.
Ocean: a very large area of sea
Noun These mysterious creatures live at the bottom of the ocean.
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.
Adjective saber-toothed cats are extinct.
