fossil: animals bone

cast:thing worn to rest a part of the body

sponge:a primitive sedentary aquatic invertebrate with a soft porous body that is typically supported by a framework of fibers or calcareous or glassy spicules. Sponges draw in a current of water to extract nutrients and oxygen.

mud:earth but mixed with wather

crab: a animal but he has a twezeers

preserved to keep something as it is

carbon:the chemical element of atomic number 6, a nonmetal which has two main forms

trilobite:an extinct marine arthropod that occurred abundantly during the Paleozoic era, with a carapace over the forepart, and a segmented hind part divided longitudinally into three lobes.

amber:hard translucent fossilized resin produced by extinct coniferous trees of the Tertiary period, typically yellowish in color.

tar:something that is in the streets

trace :a way do you follow for find something

sediment: matter that settles to the bottom of a liquid; dregs.

fish;a small animal, live in the water