Carvon:a chemical element that exists in its pure form as diamond or graphite, and is an important part of other substances such as coal and oil, as well as being contained in all plants and animals

horseshoe:a U-shaped piece of metal that is attached to the bottom of a horse's hoof to protect it

trilobite:a simple, flat sea creature that lived in the earliest period of life on earth, with a hard outer layer and a body in three parts

fish:an animal that lives in water, is covered with scales, and breathes by taking water in through its mouth, or the flesh of these animals eaten as food

fossil:the shape of a bone, a shell, or a plant or animal that has been preserved in rock for a very long period

footprint:the mark made by a person's or animal's foot

cast:the doctor put thr cast

sponge:a soft substance that is full of small holes and can absorb a lot of liquid, and is used for washing and cleaning

trade:the activity of buying and selling, or exchanging, goods and/or services between people or countries

sediment:a soft substance that is like a wet powder and consists of very small pieces of a solid material that have fallen to the bottom of a liquid:

mineral:a valuable or useful chemical substance that is formed naturally in the ground

preserved:to keep something as it is, especially in order to prevent it from decaying or being damaged or destroyed