amber - hardened tree sap, burial site - (n) an area of land where dead bodies are buried, shipwreck - n. a ship that has been destroyed in an accident at sea, fossilised - hardened into a fossil, catch up on something - spend time doing an activity you have not had time to do recently, muddy - (adj.) covered with wet dirt, sea floor/bed - the bottom of the sea, sediment - matter that settles to the bottom of a liquid, errosion - The wearing away by action of wind, water, or ice., to provide clues - to give hints that help solve a problem or a mystery, to reinforce - to make stronger with new materials or support, biases - opinions or beliefs that affect a person's ability to make fair, unclouded judgments or decisions, to strive for sth - to make a great effort to achieve something, Conduct excavations - the act of removing earth that is covering very old objects buried in the ground in order to discover things about the past, to enhance - to improve,

Fossils (Complete IELTS 6.5-7, unit 5)

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