preserved: to keep something as it is, especially in order to prevent it from decaying or being damaged or destroyed
is a verb. to preserve the environment
trilobite: a simple, flat sea creature that lived in the earliest period of life on earth
is a noun. Some, such as those on brachiopods, trilobites and chitinozoa, record information pooled by many specialists; others are the work of one or a few wor
trace: to find someone or something that was lost
is a noun. The police are trying to trace the mother of a newborn baby found abandoned outside a hospital.
horseshoe:a U-shaped piece of metal that is attached to the bottom of a horse's hoof to protect it
is a noun. For many people the horseshoe is a symbol of good luck.
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mineral: a valuable or useful chemical substance that is formed naturally in the ground
is a noun. A healthy diet should supply all necessary vitamins and minerals.
crab: a sea creature with five pairs of legs and a round, flat body covered by a shell, or its flesh eaten as food
is a noun. We walked along the beach collecting small crabs.
fossil: the shape of a bone, a shell, or a plant or animal that has been preserved in rock for a very long period
is a noun. Most bivalve fossils are a few centimetres long; the ideal size for collecting.
mold: Someone who molds someone else has an important influence on how that person develops
is a noun. Parents help mold a child’s character.
dinosaur: a type of reptile that became extinct about 65,000,000 years ago
is a noun. The old car was a gas-guzzling dinosaur and we had to get rid of it
impression: an idea or opinion of what something or someone is like
is a noun. What was your impression of Charlotte's husband?
mud: earth that has been mixed with water
is a noun. The vehicles got bogged down in the heavy mud.
footprint: the mark made by a person's or animal's foot
is a noun. The new computer has a smaller footprint.
fish: an animal that lives in water
is a noun. Several large fish live in the pond.
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
is a noun. There was a brown sediment in the bottom of the bottle.
amber: a hard, transparent, yellowish-brown substance that was formed in ancient times from resin
is a noun. He has a collection of prehistoric insects preserved in amber
tar: a black substance, sticky when hot, used especially for making roads
is a noun. a low tar cigarette
cast: the actors in a film, play, or show
is a noun. After the final performance the director threw a party for the cast.
sponge: a soft substance that is full of small holes and can absorb a lot of liquid
is a noun. Give it a sponge with a damp cloth - that will remove the blood stains