Types of Fossils

What is the most common type of way for fossils to occur?

Answer explanation

Petrification!

What happens to a shell, bone or tooth after it is buried in sediment

• It dissolves completely

• It becomes a fossil

• It remains unchanged

• It turns into a diamond

What materials can fill the spaces in shells or bones during petrification?

Answer explanation

After a shell, bone or tooth is buried in sediment, it may be exposed to mineral-rich fluids that move through shells or bones and becomes filled with preserving material such as calcium carbonate or silica.

What process forms some fossils when their remains are compressed at a certain depth?

• Sedimentation

• Compaction

• Metamorphism

• Erosion

What is produced as a result of high-pressure forces exerted by the weight of overlying sediments and/or perhaps sea water?

• Diamonds

• Silt

• Coal

• Oil and natural gas

Plants are the type of organism that tend to be good examples of fossils produced by compression

• True
• False

What is the name of the ancient snail/slug whose mould is shown in the image?

• Trilobite

• Bellatraphon

• Bellerophon

• Belleephone

Fossils can form when the mould of the interior of the shell is made by _______ going through it, but later the shell materials dissolves away

Why are soft-bodied sea creatures such as snails commonly found as moulds and casts?

• Their shells are very hard

• Their shells dissolve easily

• They live in water

• They are large in size

Insects are preserved in amber by

• Being trapped in tree resin that hardens over time

• being buried under layers of sediment

• being frozen in ice

• being dried out by the sun