Question

task 3: fossils

match the type of fossil with the correct description.

impints left behind in the sediments by an organism.

occurs when minerals carried in water build up in the spaces of an organism and eventually become rock.

formed when sediment leaks into a mold and hardens to form a copy of the original structure.

impints left from something that was buried. the structure decays and its imprint or mold is left in the sediment.

body parts of ancient organisms such as bones, shells, teeth, or plant leaves

traces left by organisms such as burrows, feces, tracks, trails, nests, or footprints.

molds impressions mineralization casts body fossil trace fossil

Explanation:

• Impressions: Impressions are imprints left behind in the sediments by an organism.
• Mineralization: Mineralization occurs when minerals carried in water build up in the spaces of an organism and eventually become rock.
• Casts: Casts are formed when sediment leaks into a mold and hardens to form a copy of the original structure.
• Molds: Molds are imprints left from something that was buried. The structure decays and its imprint or mold is left in the sediment.
• Body fossil: Body fossils are body parts of ancient organisms such as bones, shells, teeth, or plant leaves.
• Trace fossil: Trace fossils are traces left by organisms such as burrows, feces, tracks, trails, nests, or footprints.

Answer:

• Imprints left behind in the sediments by an organism: Impressions
• Occurs when minerals carried in water build up in the spaces of an organism and eventually become rock: Mineralization
• Formed when sediment leaks into a mold and hardens to form a copy of the original structure: Casts
• Imprints left from something that was buried. The structure decays and its imprint or mold is left in the sediment: Molds
• Body parts of ancient organisms such as bones, shells, teeth, or plant leaves: Body fossil
• Traces left by organisms such as burrows, feces, tracks, trails, nests, or footprints: Trace fossil